Telescope and Facility
Optical data for the SOAR telescope and SOAR Optical Imager (SOI) Foci:
Note that for focal lengths and f/ratios two values are given: the first one is the working value and is used to compute the plate scales etc., while the second one is the paraxial value to be used for "calculating backwards". The difference between the working and paraxial values for the telescope is very small; it is significant for the faster beams at the guider foci. The entrance pupil value is determined by the primary mirror baffle which has a diameter of 4100mm. Items marked with an asterisk * have not been Zemax modeled yet.
SOAR telescope as built Optical Specifications: |
|
|
M1 total diameter |
4300mm |
| Entrance Pupil Diameter | 4100mm |
| Pupil central Obstruction | 980mm |
| M1 working f/# | 1.6855 |
| SOAR focal plane working f/# | 16.625 |
| SOAR EFL | 68176.3mm |
| Gamma ratio (dZ(foc)/dZ(M2)) | 100.5 |
| Zero-Vignetting Field Diameter | 14.4arcmin |
| Focal Plane Radius of curvature | 966.3mm |
| Sag w/r to Maximum Field | 10.59mm |
Nasmyth foci at the Instrument Support Boxes: |
||
|
Entrance Pupil diam. |
4100mm |
|
|
EFL |
68162.5mm |
68176.3mm |
|
f/# |
16.625 |
16.628 |
|
Plate Scale |
330.53 um/arcsec |
3.025 arcsec/mm |
|
Field diameter |
14.4 arcmin (no vignetting) |
|
OPT_ISB TTGuider: |
||
| Entrance pupil diam. | 4100mm | |
| EFL | 13445.1mm | 12579.9mm |
| F/# | 3.279 | 3.068 |
| Plate Scale | 65.20 um/arcsec = 15.3 arcsec/mm = 0.37 arcsec/pix | |
| Pixel size | 24um | |
| Field diameter | 8 arcsec | |
* IR_ISB TTGuider: |
|
| Entrance pupil diam. | 4100mm |
| EFL | 17056mm |
| F/# | 4.16 |
| Plate Scale | 82.76 um/arcsec= 12.08 arcsec/mm = 0.29 arcsec/pix. |
| Pixel size | 24um |
| Field diameter | 8 arcsec |
SOAR Optical Imager: |
||
| Exit pupil diam. | 617.272mm | |
| Exit Pupil position | -6073.094mm | |
| Entrance Pupil diam. | 4100mm | |
| EFL | 40303.1mm | 40294.9 mm |
| F/# | 9.83 | 9.828 |
| Scale | 195.4 um/arcsec = 5.12 arcsec/mm = 0.077 arcsec/pix | |
| Pixel size | 15um | |
| SOI Field | 5.24 x 5.24 arcmin^2 | |
| Field Diag. | 7.4 arcmin | |
SOI TT Guider: |
||
| Entrance Pupil Diam. | 4100mm | |
| EFL | 22796mm | 20759.1mm |
| F/# | 5.56 | 5.06 |
| Scale | 110.5 um/arcsec = 9.05 arcsec/mm = 0.22 arcsec/pix | |
| Pixel size | 24um | |
| Guiding Field | 6.34 x 6.34 arcsec^2 | |
| Field Diag. | 9 arcsec | |
* CWFS aquisition camera: |
|
| Scale | SOAR scale x Magnif.factor |
| Scale | 329.847x0.606= 0.20 mm/arcsec = 5.00 arcsec/mm = 0.12 arcsec/pix |
| Pixel size | 24um |
| Aquisition Field | 2.05 arcmin |
* CWFS Shack-Hartmann camera: |
|
| scale | SOAR scale x 60/246.492 |
| scale | 80 um/arcsec = 12.46 arcsec/mm = 0.30 arcsec/pix |
| Pixel size | 24um |
