Diff for "ZemaxSimul2012" - www.iram.es Main Wiki

Differences between revisions 4 and 5

Prediction of field distortion from Zemax simulations, June 1, 2012, SL

Example for the 2mm array (which has the bigger FOV in the June 2012 configuration, hence the biggest distortions):

Zemax_NIKA_2012_fit_Grid_distrotion_to_FOV_Geometry_2mm.jpg

Equations and more details: NIKA_2012_grid_distortion.pdf
Grid distortion output from zemax (attention this is the position of incoming rays with respect to a regular grid on the image, that is to say the inverse of the FOV distortion !): 12x12 grid 14x14 grid

Image 1 = 30m telescope with NIKA simulated in ZEMAX, including the tetrapod (arms holding M2 from M1 at ~2/3rd of its radius )
Image 2 = Image plane (on KID array) at nominal focus (M2 = 0), fields numbered from 1 to 4 = fields shown on the PSF images; 1 = top left, 2 = top right, 3 = bottom left, 4 = bottom right
Image 3 = PSF at nominal focus (M2 = 0), without the tetrapod
Image 4 = PSF at nominal focus (M2 = 0), with the tetrapod
Text files of the 4 PSF shown in image 4: field 0 field +X field +Y field -X-Y

Zemax_PSF_4_fields_distributed_Y_pattern_NIKA_2012_1mm_M2_0_NO_TETRAPOD_.jpg

Zemax_image_plane_NIKA_2012_M2_+1mm_.jpg Zemax_PSF_4_fields_distributed_Y_pattern_NIKA_2012_1mm_M2_+1mm_.jpg

Zemax_PSF_4_fields_distributed_Y_pattern_NIKA_2012_1mm_M2_-1mm_.jpg

Bonus: text files of the PSF at M2 = +0.5mm: field 0 field +X; and at -0.5mm: field 0 field +X

-  ⇤ ← Revision 4 as of 2012-06-04 20:18:27 → 
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  Editor: NikaBolometer
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+   ← Revision 5 as of 2012-06-04 20:19:11 → ⇥
  Size: 3290
  Editor: NikaBolometer
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- .Grid distortion output from zemax (attention this is the position of incoming rays with respect to a regular grid on the image, that is to say the inverse of the FOV distortion !): [[attachment:Zemax_NIKA_2012_grid_distortion_12x12.TXT|12x12 grid]] [[attachment:Zemax_NIKA_2012_grid_distortion_14x14.TXT|14x14 grid]]]
+ .Grid distortion output from zemax (attention this is the position of incoming rays with respect to a regular grid on the image, that is to say the inverse of the FOV distortion !): [[attachment:Zemax_NIKA_2012_grid_distortion_12x12.TXT|12x12 grid]] [[attachment:Zemax_NIKA_2012_grid_distortion_14x14.TXT|14x14 grid]]