Subject: IRTF WFS

From: Chris Shelton <[email-masked]>
Date: Wed, 26 Apr 2000 07:57:03 -1000

26 April 2000
Here is a first cut at a WFS for the IRTF AO.

It has f/60.0 at the membrane mirror, a 20 mm diam lenslet pupil,
and steers over a square field 80 arcsec on an edge.  The design
is optimized at 0.70, 0.85 and 1.00 microns.  It fits in the
currently defined envelope.

Strehl ratio, through telescope, AO relay, Spex, and WFS up to the
membrane mirror, is as follows for the center and the corner of
the square field.

Strehl ratio at membrane mirror
Wavelength    Center   Corner
0.70          0.993    0.988
0.85          0.999    0.980
1.00          0.991    0.996

These files are attached:

  wfs2000apr26.zmx   The raytrace file
  raytracefigs.doc   Two annotated views of the WFS, saved as a .doc
page
  wfs2000apr26.zip   A zip of the above, in case the .zmx file appears
inline.

Chris S

VERS 8165 776
NAME IRTF ADAPTIVE OPTICS
NOTE 1 Notes...
NOTE 2  
NOTE 3  
UNIT MM
FLOA
PUPD 86375.2 3001.78
GFAC 0 0
GCAT INFRARED OLD_SCHO
RAIM 1.0E-8 1 1 1 0 0
PUSH 0 0 0 0
SDMA 0 1
FTYP 0
ROPD 2
PICB 1
XFLD 0 -0.01111 0.01111 -0.01111 0.01111
YFLD 0 0.01111 0.01111 -0.01111 -0.01111
FWGT 1 0.25 0.25 0.25 0.25
WAVL 0.7 0.85 1
WWGT 1 1 1
PWAV 2
POLS 1 0 1 0 0
GLRS 1
COFN COATING.DAT
SURF 0
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 22
  DISZ INFINITY
  DIAM 0 0 0
SURF 1
  COMM PRIMARY
  TYPE STANDARD
  CURV -6.542597214816e-005 0 0 0
  SLAB 23
  DISZ -7021.0253761
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1
  DIAM 1523.83679 0 0
SURF 2
  COMM SECONDARY
  STOP
  TYPE STANDARD
  CURV -0.00075138536677 0 0 0
  SLAB 24
  DISZ 7021.0253761
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1.314627
  PZUP 1 -1 0
  DIAM 122 1 0
SURF 3
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 1
  DISZ 892.075
  DIAM 53.9495838 0 0
SURF 4
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 2
  DISZ 250.3508
  DIAM 45.3101339 0 0
SURF 5
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 3
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 47.94790641024
  PARM 5 1.411282358447
  PARM 6 1
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 6
  COMM FOLD1
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 4
  DISZ 0
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 55.4306504 0 0
  SQAP 53.0408 53.0408
SURF 7
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 5
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 47.94790641024
  PPAR 4 5 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -1092.8092938
  DIAM 0 0 0
SURF 8
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 16
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 51.70199301448
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 9
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 6
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -4.729997685035
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 10
  COMM FOLD2
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 7
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 32.4359971 0 0
SURF 11
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 8
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -4.729997685035
  PPAR 4 9 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 12
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 25
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 -51.31981615672
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 85.3439062
  PZUP 7 1 1178.1532
  DIAM 0 0 0
SURF 13
  COMM FOC1
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 6
  DISZ 1895.6721
  DIAM 31.5629186 0 0
SURF 14
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 13
  PARM 1 0
  PARM 2 266.6721
  PARM 3 -8
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 15
  COMM OAP1 COLL
  TYPE STANDARD
  CURV -0.0002611918077712 0 0 0
  SLAB 8
  DISZ 0
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1
  DIAM 316.944161 0 0
  CLAP 0 64
  OBDC 0 -267.722
SURF 16
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 9
  PARM 1 0
  PARM 2 -267.722
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -2323.7417
  DIAM 0 0 0
SURF 17
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 10
  PARM 1 0
  PARM 2 0
  PARM 3 -3
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 18
  COMM AO DM
  TYPE EVENASPH
  CURV 3.493370544305e-007 0 0 0
  SLAB 11
  PARM 1 0
  PARM 2 -2.75696536067e-010
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 25.3171154 0 0
  CLAP 0 30
SURF 19
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 28
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 25.3171153 0 0
SURF 20
  TYPE BICONICX
  CURV 2.405468576967e-009 0 0 0
  SLAB 26
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 25.3171154 0 0
SURF 21
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 12
  PARM 1 0
  PARM 2 0
  PARM 3 -3
  PPAR 3 17 1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 22
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 27
  PARM 1 0
  PARM 2 267.722
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 2290.9823427
  DIAM 0 0 0
SURF 23
  COMM OAP2 CAM
  TYPE STANDARD
  CURV -0.0002611918077712 0 0 0
  SLAB 14
  DISZ 0
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1
  DIAM 315.742678 0 0
  CLAP 0 64
  OBDC 0 -267.722
SURF 24
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 15
  PARM 1 0
  PARM 2 -266.6721
  PARM 3 8
  PARM 4 0
  PARM 5 0
  PARM 6 1
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 25
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 17
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -829.78378866
  DIAM 0 0 0
SURF 26
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 18
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -45
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 27
  COMM FOLD 3
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 19
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 61.2152255 0 0
  SQAP 60.2983 60.2983
SURF 28
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 20
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -45
  PPAR 4 26 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 356.23422408
  DIAM 0 0 0
SURF 29
  COMM FO/VJ ALIGNMENT
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 3
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 30
  COMM TOP OF CAL BOX
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 4
  DISZ 279.4
  DIAM 43.276125 0 0
SURF 31
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 5
  PARM 1 0
  PARM 2 0
  PARM 3 5
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 32
  COMM WINDOW
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 6
  DISZ 6.35
  GLAS CAF2 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
  SQAP 38.0999985 38.0999985
SURF 33
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 7
  DISZ 0
  DIAM 38.1 1 0
  SQAP 38.0999985 38.0999985
SURF 34
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 8
  PARM 1 0
  PARM 2 0.9
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 35
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 9
  PARM 1 0
  PARM 2 0
  PARM 3 -5
  PPAR 3 31 -1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 5
  DIAM 0 1 0
SURF 36
  COMM SQ. BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 10
  DISZ 75.47
  DIAM 38.3047888 0 0
  SQAP 60 60
SURF 37
  COMM BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 11
  DISZ 60
  DIAM 37.0994468 0 0
  CLAP 0 57.9
SURF 38
  COMM BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 12
  DISZ 48
  DIAM 36.1411786 0 0
  CLAP 0 56.6
SURF 39
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 13
  PARM 1 0
  PARM 2 0
  PARM 3 -45
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 40
  COMM DICHROIC
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 14
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 40 1 0
  SQAP 54.102 73.052
SURF 41
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 17
  PARM 1 0
  PARM 2 0
  PARM 3 -45
  PPAR 3 39 1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -237.3507705
  DIAM 0 0 0
SURF 42
  COMM WFS FOCUS
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 29
  DISZ -65
  DIAM 31.5856304 0 0
  CLAP 0 50
SURF 43
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 32
  PARM 1 0
  PARM 2 0
  PARM 3 45
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 44
  COMM WFS MIRROR 1
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 31
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 40.2128296 0 0
SURF 45
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 30
  PARM 1 0
  PARM 2 0
  PARM 3 45
  PPAR 3 43 1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 342.558319
  DIAM 0 0 0
SURF 46
  COMM WFS LENS1
  TYPE STANDARD
  CURV 0.002739658282642 0 0 0
  SLAB 33
  DISZ 5
  GLAS SF5 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
SURF 47
  COMM 427.5 MM FL
  TYPE STANDARD
  CURV 0.005804226626295 0 0 0
  SLAB 45
  DISZ 12
  GLAS SK11 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
SURF 48
  TYPE STANDARD
  CURV -0.005804226626295 4 47 -1
  SLAB 47
  DISZ 5
  GLAS SF5 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
SURF 49
  TYPE STANDARD
  CURV -0.002739658282642 4 46 -1
  SLAB 46
  DISZ 389.39778669
  CHZH 0 0
  DIAM 38.1 1 0
SURF 50
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 36
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 51
  COMM STEERING MIRROR
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 35
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 52
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 34
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 50 1 0
  PARM 4 5
  PPAR 4 50 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 53
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 44
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 50 -2 0
  PARM 4 0
  PPAR 4 50 -2 10
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 54
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 39
  DISZ -250
  DIAM 5.44243487 0 0
SURF 55
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 43
  DISZ -400
  DIAM 24.4626738 0 0
  CLAP 0 8
SURF 56
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 41
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -3
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 57
  COMM WFS MIRROR 3
  TYPE STANDARD
  CURV 0.0007692307692308 0 0 0
  SLAB 40
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 58
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 37
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -3
  PPAR 4 56 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 650
  DIAM 0 0 0
SURF 59
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 38
  PARM 1 0
  PARM 2 0
  PARM 3 -2
  PARM 4 -2
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 60
  COMM MEMBRANE MIRROR
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 48
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 25 1 0
SURF 61
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 42
  PARM 1 0
  PARM 2 0
  PARM 3 -2
  PPAR 3 59 1 0
  PARM 4 -2
  PPAR 4 59 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -900
  DIAM 0 1 0
SURF 62
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 50
  PARM 1 0
  PARM 2 0
  PARM 3 1.9489444089
  PARM 4 4.5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 63
  COMM WFS MIRROR 4
  TYPE STANDARD
  CURV 0.0003805920123407 0 0 0
  SLAB 49
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 64
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 51
  PARM 1 0
  PARM 2 0
  PARM 3 1.9489444089
  PPAR 3 62 1 0
  PARM 4 4.5
  PPAR 4 62 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 927.99231088
  DIAM 0 0 0
SURF 65
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 54
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 -4.5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 66
  COMM WFS MIRROR 5
  TYPE STANDARD
  CURV -0.0001323966559731 0 0 0
  SLAB 53
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 24.6152824 0 0
SURF 67
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 55
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 65 1 0
  PARM 4 -4.5
  PPAR 4 65 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -550
  DIAM 0 0 0
SURF 68
  COMM LENSLET
  TYPE PARAXIAL
  CURV 0.0 0 0.0 0.0
  SLAB 52
  PARM 1 100
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -100
  DIAM 18.6583568 0 0
SURF 69
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 56
  DISZ 0
  DIAM 4.17263773 0 0
SURF 70
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 21
  DISZ 0
  DIAM 25.4 1 0
RAGA  40   2              0              0              0              0              0              0
RAGB  63   2              0              0              0              0              0              0
ISFN   0   0              0              0              0              0              5              0
EXPP   0   0              0              0              0              0           -100              0
ISFN   0   0              0              0              0              0             60              0
RANG  70   1              0              1              0              0              0              0
EXPP   0   0              0              0              0              0        -1e+010              0
DMFS   0   0              0              0              0              0              0              0
BLNK Start of default merit function.
BLNK No default air thickness boundary constraints.
BLNK No default glass thickness boundary constraints.
BLNK Operands for field 1.
OPDX   0   1              0              0    0.167855344    0.290733983              0   0.0484813681
OPDX   0   1              0              0    0.353553391    0.612372436              0    0.077570189
OPDX   0   1              0              0    0.470982573    0.815765745              0   0.0484813681
OPDX   0   1              0              0    0.335710687              0              0   0.0484813681
OPDX   0   1              0              0    0.707106781              0              0    0.077570189
OPDX   0   1              0              0    0.941965145              0              0   0.0484813681
OPDX   0   1              0              0    0.167855344   -0.290733983              0   0.0484813681
OPDX   0   1              0              0    0.353553391   -0.612372436              0    0.077570189
OPDX   0   1              0              0    0.470982573   -0.815765745              0   0.0484813681
OPDX   0   1              0              0   -0.167855344   -0.290733983              0   0.0484813681
OPDX   0   1              0              0   -0.353553391   -0.612372436              0    0.077570189
OPDX   0   1              0              0   -0.470982573   -0.815765745              0   0.0484813681
OPDX   0   1              0              0   -0.335710687 2.57059643e-016              0   0.0484813681
OPDX   0   1              0              0   -0.707106781 5.41444238e-016              0    0.077570189
OPDX   0   1              0              0   -0.941965145 7.21279464e-016              0   0.0484813681
OPDX   0   1              0              0   -0.167855344    0.290733983              0   0.0484813681
OPDX   0   1              0              0   -0.353553391    0.612372436              0    0.077570189
OPDX   0   1              0              0   -0.470982573    0.815765745              0   0.0484813681
OPDX   0   2              0              0    0.167855344    0.290733983              0   0.0484813681
OPDX   0   2              0              0    0.353553391    0.612372436              0    0.077570189
OPDX   0   2              0              0    0.470982573    0.815765745              0   0.0484813681
OPDX   0   2              0              0    0.335710687              0              0   0.0484813681
OPDX   0   2              0              0    0.707106781              0              0    0.077570189
OPDX   0   2              0              0    0.941965145              0              0   0.0484813681
OPDX   0   2              0              0    0.167855344   -0.290733983              0   0.0484813681
OPDX   0   2              0              0    0.353553391   -0.612372436              0    0.077570189
OPDX   0   2              0              0    0.470982573   -0.815765745              0   0.0484813681
OPDX   0   2              0              0   -0.167855344   -0.290733983              0   0.0484813681
OPDX   0   2              0              0   -0.353553391   -0.612372436              0    0.077570189
OPDX   0   2              0              0   -0.470982573   -0.815765745              0   0.0484813681
OPDX   0   2              0              0   -0.335710687 2.57059643e-016              0   0.0484813681
OPDX   0   2              0              0   -0.707106781 5.41444238e-016              0    0.077570189
OPDX   0   2              0              0   -0.941965145 7.21279464e-016              0   0.0484813681
OPDX   0   2              0              0   -0.167855344    0.290733983              0   0.0484813681
OPDX   0   2              0              0   -0.353553391    0.612372436              0    0.077570189
OPDX   0   2              0              0   -0.470982573    0.815765745              0   0.0484813681
OPDX   0   3              0              0    0.167855344    0.290733983              0   0.0484813681
OPDX   0   3              0              0    0.353553391    0.612372436              0    0.077570189
OPDX   0   3              0              0    0.470982573    0.815765745              0   0.0484813681
OPDX   0   3              0              0    0.335710687              0              0   0.0484813681
OPDX   0   3              0              0    0.707106781              0              0    0.077570189
OPDX   0   3              0              0    0.941965145              0              0   0.0484813681
OPDX   0   3              0              0    0.167855344   -0.290733983              0   0.0484813681
OPDX   0   3              0              0    0.353553391   -0.612372436              0    0.077570189
OPDX   0   3              0              0    0.470982573   -0.815765745              0   0.0484813681
OPDX   0   3              0              0   -0.167855344   -0.290733983              0   0.0484813681
OPDX   0   3              0              0   -0.353553391   -0.612372436              0    0.077570189
OPDX   0   3              0              0   -0.470982573   -0.815765745              0   0.0484813681
OPDX   0   3              0              0   -0.335710687 2.57059643e-016              0   0.0484813681
OPDX   0   3              0              0   -0.707106781 5.41444238e-016              0    0.077570189
OPDX   0   3              0              0   -0.941965145 7.21279464e-016              0   0.0484813681
OPDX   0   3              0              0   -0.167855344    0.290733983              0   0.0484813681
OPDX   0   3              0              0   -0.353553391    0.612372436              0    0.077570189
OPDX   0   3              0              0   -0.470982573    0.815765745              0   0.0484813681
MNUM 1

---

From: Chris Shelton <[email-masked]>
Date: Fri, 02 Jun 2000 10:41:26 -1000

Good morning!  Here is your new IRTF WFS optical design.

This one is all reflective.  It uses a small steering mirror 
(14 mm pupil) and has all spherical mirrors, except one mirror 
with a bit of a cylinder component.  That mirror has x focal 
length of -1620 mm and a y focal length of -1641 mm, over a clear 
aperture of 14 mm, so it is very close to a sphere.

A possibility that I discussed with Doug is to make this mirror a
sphere, but include an adjustable astigmatism nuller, which would
be a tiltable plate in the converging beam between the mirror
before the membrane mirror and the membrane mirror itself.  This
would allow nulling the astigmatism in the science path due to
the dichroic thickness, without software offsets, in addition to
eliminating all aspheres.  It might need to be set differently 
for SPEX and NSFCam, or the difference handled as a software offset,
or the difference may be ignorable.

Other properties are the same as the one-lens design of May 26 --
f/60.0 at the membrane mirror, a 20.0 mm diam. lenslet pupil,
steers over a square field 80 arcsec on an edge.  

The WFS box envelope and the envelopes of the membrane mirror
and lenslet assemblies, as emailed by Dan, have been accounted
for.

The strehl ratio at the membrane mirror, at 0.85 microns, is
  Center of field 0.999   
  Four corners    0.958, 0.909, 0.963, 0.980

If the WFS camera mirror is ground as a pure sphere and no
astigmatism nuller is used, the strehls are reduced to
  Center of field 0.769
  Four corners    0.722, 0.857, 0.710, 0.660

A zip file is attached, wfs2000jun2.zip, which contains
  wfs2000may30.zmx, .igs and .eps

The postscript file has annotated plan and side views of the 
optical design showing how it fits with the WFS box, membrane 
mirror assembly and lenslet assembly.

Cheers,

Chris S

---

From: Buzz Graves <[email-masked]>
Date: Fri, 2 Jun 2000 14:59:28 -1000

Upon first try to unpack the .ZMX file I'm having trouble.  I tried 
on my MAC and my PC, both claim something is corrupted.   Can you 
send it whole?

Buzz

---

From: Chris Shelton <[email-masked]>
Date: Fri, 02 Jun 2000 17:01:26 -1000

Buzz -

Will do.  I'll send the eps file again too, it shows the packing in
the box.  These should be attachments, not text.  There is a button
in Netscape on the recipient side View/Attachments In Line that should
not be checked.

I used Winzip, by the way.  In the past it has worked ok.  I sent the
files zipped because Doug uses a dial-up line.

Chris

> on my MAC and my PC, both claim something is corrupted.   Can you

VERS 8165 1862
NAME IRTF ADAPTIVE OPTICS
NOTE 1 Notes...
NOTE 2  
NOTE 3  
UNIT MM
FLOA
PUPD 86375.2 3001.78
GFAC 0 0
GCAT INFRARED OLD_SCHO
RAIM 1.0E-8 1 1 1 0 0
PUSH 0 0 0 0
SDMA 0 1
FTYP 0
ROPD 2
PICB 1
XFLD 0 -0.01111 0.01111 -0.01111 0.01111
YFLD 0 0.01111 0.01111 -0.01111 -0.01111
FWGT 1 0.001 0.001 0.001 0.001
WAVL 0.85
WWGT 1
PWAV 1
POLS 1 0 1 0 0
GLRS 1
COFN COATING.DAT
SURF 0
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 22
  DISZ INFINITY
  DIAM 0 0 0
SURF 1
  COMM PRIMARY
  TYPE STANDARD
  CURV -6.542597214816e-005 0 0 0
  SLAB 23
  DISZ -7021.0253761
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1
  DIAM 1523.83679 0 0
SURF 2
  COMM SECONDARY
  STOP
  TYPE STANDARD
  CURV -0.0007513702363315 0 0 0
  SLAB 24
  DISZ 7021.0253761
  GLAS MIRROR 0 0 0.000000 0.000000 0.000000 0 0 0 0.00000000 0.00000000
  CONI -1.3052
  PZUP 1 -1 0
  DIAM 122 1 0
SURF 3
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 1
  DISZ 892.075
  DIAM 53.9743679 0 0
SURF 4
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 2
  DISZ 250.3508
  DIAM 45.3380645 0 0
SURF 5
  COMM AO SUB
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  DISZ 112.2532
  DIAM 42.9143832 0 0
SURF 6
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 20
  DISZ 356.23422408
  DIAM 41.8276442 0 0
SURF 7
  COMM FO/VJ ALIGNMENT
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 3
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 8
  COMM TOP OF CAL BOX
  TYPE STANDARD
  CURV 0 0 0 0
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  DISZ 279.4
  DIAM 38.3788906 0 0
SURF 9
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 5
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
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  DISZ 0
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SURF 10
  COMM WINDOW
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 6
  DISZ 0
  GLAS CAF2 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
  SQAP 38.0999985 38.0999985
SURF 11
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 18
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 9 -0.69928 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 6.35
  DIAM 0 0 0
SURF 12
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 16
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  PPAR 3 11 -1 0
  PARM 4 0
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  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 13
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 7
  DISZ 0
  DIAM 38.1 1 0
  SQAP 38.0999985 38.0999985
SURF 14
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 9
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 9 -1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 5
  DIAM 0 1 0
SURF 15
  COMM SQ. BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 10
  DISZ 75.47
  DIAM 35.5825869 0 0
  SQAP 60 60
SURF 16
  COMM BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 11
  DISZ 60
  DIAM 34.8519512 0 0
  CLAP 0 57.9
SURF 17
  COMM BAFFLE
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 12
  DISZ 48
  DIAM 34.2710828 0 0
  CLAP 0 56.6
SURF 18
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 13
  PARM 1 0
  PARM 2 0
  PARM 3 -45
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 19
  COMM DICHROIC
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 14
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 40 1 0
  SQAP 54.102 73.052
SURF 20
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 17
  PARM 1 0
  PARM 2 0
  PARM 3 -45
  PPAR 3 18 1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -202.3507705
  DIAM 0 0 0
SURF 21
  COMM BOX WALL
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 27
  DISZ -35
  DIAM 31.8474018 0 0
SURF 22
  COMM WFS FOCUS
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 29
  DISZ -65
  DIAM 31.5298633 0 0
SURF 23
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 32
  PARM 1 0
  PARM 2 0
  PARM 3 45
  PARM 4 0
  PARM 5 -4.2
  PARM 6 1
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 24
  COMM WFS FOLD MIRROR
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 31
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 41.3988464 0 0
SURF 25
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 30
  PARM 1 0
  PARM 2 0
  PARM 3 45
  PPAR 3 23 1 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 460
  DIAM 0 0 0
SURF 26
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 33
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 3.5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 27
  COMM WFS COLL MIRROR
  TYPE STANDARD
  CURV -0.0009665981447696 0 0 0
  SLAB 46
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 38.1 1 0
SURF 28
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 42
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 26 1 0
  PARM 4 3.5
  PPAR 4 26 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -545.89793825
  DIAM 0 0 0
SURF 29
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 36
  PARM 1 0
  PARM 2 0
  PARM 3 3
  PARM 4 -3.5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 30
  COMM STEERING MIRROR
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 35
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 31
  COMM BAFFLE 1
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 28
  DISZ 0
  DIAM 6.87059774 0 0
  CLAP 0 7
SURF 32
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 34
  PARM 1 0
  PARM 2 0
  PARM 3 3
  PPAR 3 29 1 0
  PARM 4 -3.5
  PPAR 4 29 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 33
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 44
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 29 -2 6
  PARM 4 0
  PPAR 4 29 -2 -7
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 34
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 26
  DISZ 300
  DIAM 6.83900976 0 0
SURF 35
  COMM BAFFLE 2
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 43
  DISZ 510
  DIAM 25.0869933 0 0
  CLAP 0 9
SURF 36
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 41
  PARM 1 0
  PARM 2 0
  PARM 3 -2.929056965905
  PARM 4 -4.5
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 37
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 19
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 -19.52474724054
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 38
  COMM WFS CAM MIRROR
  TYPE BICONICX
  CURV -0.0006172839506173 0 0 0
  SLAB 40
  PARM 1 -1640.807769992
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 39
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 25
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 19.52474724054
  PPAR 5 37 -1 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 40
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 37
  PARM 1 0
  PARM 2 0
  PARM 3 -2.929056965905
  PPAR 3 36 1 0
  PARM 4 -4.5
  PPAR 4 36 1 0
  PARM 5 0.7874034231008
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 41
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 48
  DISZ -796.00283561
  DIAM 25 1 0
SURF 42
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 38
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 2
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 43
  COMM MEMBRANE MIRROR
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 48
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 49.8902504 0 0
SURF 44
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 42
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 42 1 0
  PARM 4 2
  PPAR 4 42 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 810
  DIAM 0 0 0
SURF 45
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 50
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 2.7
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 46
  COMM WFS MIRROR 4
  TYPE STANDARD
  CURV -0.0003205829029395 0 0 0
  SLAB 49
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 47
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 51
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 45 1 0
  PARM 4 2.7
  PPAR 4 45 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ -810
  DIAM 0 0 0
SURF 48
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
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  PARM 1 0
  PARM 2 0
  PARM 3 0
  PARM 4 5.7
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 0
  DIAM 0 0 0
SURF 49
  COMM WFS MIRROR 5
  TYPE STANDARD
  CURV 0.0002004074261404 0 0 0
  SLAB 53
  DISZ 0
  GLAS MIRROR 0 0 1.500000 40.000000 0.000000 0 0 0 0.00000000 0.00000000
  DIAM 12.7 1 0
SURF 50
  TYPE COORDBRK
  CURV 0.0 0 0.0 0.0
  SLAB 55
  PARM 1 0
  PARM 2 0
  PARM 3 0
  PPAR 3 48 1 0
  PARM 4 5.7
  PPAR 4 48 1 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 576.45036388
  DIAM 0 0 0
SURF 51
  COMM LENSLET
  TYPE PARAXIAL
  CURV 0.0 0 0.0 0.0
  SLAB 52
  PARM 1 100
  PARM 2 0
  PARM 3 0
  PARM 4 0
  PARM 5 0
  PARM 6 0
  PARM 7 0
  PARM 8 0
  DISZ 100
  DIAM 12.7 1 0
SURF 52
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 56
  DISZ 0
  DIAM 4.16332806 0 0
SURF 53
  TYPE STANDARD
  CURV 0 0 0 0
  SLAB 21
  DISZ 0
  DIAM 25.4 1 0
BLNK 
MNUM 1

---

From: Chris Shelton <[email-masked]>
Date: Mon, 05 Jun 2000 11:37:02 -1000

Hi Buzz,

The monolithic biconic is a fancy name for a part which is mostly
sphere with a little cylinder.  I picked it because it was
the cheapest asphere you can get.  When you get a glasses prescription,
it is for a sphere with some cylinder.  For example, mine have -5
diopters
(-200 mm fl) of sphere with about a diopter (1000 mm fl) of cylinder, on
a specified axis not far from vertical.  My guess is that you could
order a pair of glasses with the right prescription, remove and
aluminize the lenses and have a part and a spare.

A professional optiker would probably just polish a sphere while using
a tilted plate as a null corrector.  It's a piece of cake.

For the astigmatizer(tm), it's just a question of desired range.  I'll
run some numbers.  The only complication is the image rotator.  The 
astigmatizer would have to have two degrees of freedom to do the slit 
thing, a tilt for magnitude and a spin around the axis for attitude.

If your WFS likes to run at null as much as you describe, a two degree
of freedom motorized astigmatism creator/nuller might be handy for this 
application.  It would give you diffraction limited imaging along the
slit, and optimal fill across the slit.  And the fill across the slit
could be varied, to accommodate different wavelength bands or seeing.
And the biconic becomes a sphere.

I proposed such a thing for mating NIRSPEC, a non-AO Keck instrument, to 
the Keck AO, but the decision was to just throw together an ordinary
focal 
reducer, as NIRC2, designed for AO, was coming up in a year or so.

Here's yet another reason for not doing the astigmatism in WFS offsets
--
think of what it would do to psf stability, particularly on faint
objects.  I don't know what your experience has been with curvature
systems, but on SH systems, putting any significant offsets into the
WFS hurts the limiting magnitude, and gives you a spot that changes
ellipticity with seeing changes, particularly wind speed changes.

Chris

Buzz Graves wrote:

> I was able to get this last file into Zemax OK.  Any idea how tough
> or expensive  it is to do a monolithic biconic?    If you are going
> to use a warping device, it should have nearly the expansion coef. of
> the glass so it doesn't become a thermometer.  I didn't look at the
> other solution using a glass block as yet.  Historical note, in the
> past we talked with Rayner about such advice to introduce astig just
> to filled his slit.  KSPEC doesn't have a small enough slit at the
> diffraction in J-H.  He proposed to defocus the image just to fill
> the slit properly.  Any thoughts on how this optical arrangement will
> cojugate the foci, WFS to science detector?

---

From: Buzz Graves <[email-masked]>
Date: Mon, 5 Jun 2000 09:10:26 -1000

Chris,

I saw your email to Jeff and his response.  We should know this week 
about the new IfA director, I am told, and there by the stage for a 
bunch of stuff.  Would still like to get you to Manoa for a visit. 
This week we are in town, but next week we are at Gemini telescope, 
monday thru wednesday, Jun 12-14.

Buzz