Residual
dispersions and pupil shifts for BK7/LLF6 ADC
for NAOMI WFS
wht-naomi-62
The residual dispersions, in arcseconds, at zenith
distances of 30, 45 and 60 degrees are tabulated below. The values are given for two ADC
settings, the first bringing 500 and
1000 nm to the same position and the second for 500 and 800 nm. The prism pair deviation and displacement
have been nulled for the laser wavelength 632.8 nm. The x and y positions of
the pupil centre for the given wavelengths are tabulated for each ADC setting
and also for the zero dispersion condition.
These values are in microns at the pupil plane, the lenslet size is 1100 microns and the
pupil is 8.08 mm in diameter.
Zenith
distance 30°
Residual
dispersions
|
Wavelength nm |
Residual dispersion in arcseconds 500-1000nm |
Residual dispersion in arcseconds 500-800nm |
|
500 |
0.0358 |
0.0208 |
|
550 |
0.0117 |
0.0039 |
|
600 |
0.0019 |
-0.0007 |
|
632.8 |
0 |
0 |
|
700 |
0.0028 |
0.0068 |
|
800 |
0.0134 |
0.0212 |
|
900 |
0.0254 |
0.0353 |
|
1000 |
0.0358 |
0.0468 |
Pupil
positions
|
Wavlength Nm |
X-position (undispersed) microns |
Y-position(dispersed) microns |
|
500 |
28.44 |
-26.57 |
|
550 |
14.70 |
-14.74 |
|
600 |
4.96 |
-4.94 |
|
632.8 |
0.05 |
-0.02 |
|
700 |
-7.47 |
7.52 |
|
800 |
-14.56 |
14.66 |
|
900 |
-18.68 |
18.87 |
|
1000 |
-20.95 |
23.39 |
Zenith
distance 45°
Residual
dispersions
|
Wavelength nm |
Residual dispersion in arcseconds 500-1000nm |
Residual dispersion in arcseconds 500-800nm |
|
500 |
0.0628 |
0.0373 |
|
550 |
0.0204 |
0.0072 |
|
600 |
0.0033 |
-0.0011 |
|
632.8 |
0 |
0 |
|
700 |
0.0051 |
0.0118 |
|
800 |
0.0240 |
0.0372 |
|
900 |
0.0451 |
0.0620 |
|
1000 |
0.0635 |
0.0824 |
Pupil
positions
|
Wavlength nm |
X-position (undispersed) microns |
Y-position(dispersed) microns |
|
500 |
26.48 |
-50.68 |
|
550 |
13.64 |
-26.04 |
|
600 |
4.60 |
-8.73 |
|
632.8 |
0.05 |
-0.04 |
|
700 |
-6.94 |
13.30 |
|
800 |
-13.52 |
25.92 |
|
900 |
-17.34 |
33.35 |
|
1000 |
-19.45 |
37.59 |
Zenith
distance 60°
Residual dispersions
|
Wavelength nm |
Residual dispersion in arcseconds 500-1000nm |
Residual dispersion in arcseconds 500-800nm |
|
500 |
0.1096 |
0.0624 |
|
550 |
0.0360 |
0.0116 |
|
600 |
0.0058 |
-0.0024 |
|
632.8 |
0 |
0 |
|
700 |
0.0072 |
0.0198 |
|
800 |
0.0384 |
0.0628 |
|
900 |
0.0737 |
0.1049 |
|
1000 |
0.1046 |
0.1395 |
Pupil
positions
|
Wavlength nm |
X-position (undispersed) microns |
Y-position(dispersed) microns |
|
500 |
19.46 |
-86.79 |
|
550 |
10.0 |
-44.59 |
|
600 |
3.39 |
-14.95 |
|
632.8 |
0.03 |
-0.06 |
|
700 |
-5.11 |
22.77 |
|
800 |
-9.96 |
44.38 |
|
900 |
-12.78 |
57.11 |
|
1000 |
-14.33 |
64.39 |
Pupil displacements for ADC set to null dispersion
Pupil
positions
|
Wavlength nm |
X-position (undispersed) microns |
Y-position(dispersed) microns |
|
500 |
29.35 |
0 |
|
550 |
15.16 |
0 |
|
600 |
5.12 |
0 |
|
632.8 |
0.05 |
0 |
|
700 |
-7.71 |
0 |
|
800 |
-15.03 |
0 |
|
900 |
-19.27 |
0 |
|
1000 |
-21.62 |
0 |