Calibrations

Raytrace optical design program

Design a telescope, optimize the design, compute diffraction patterns, Strehl ratios, MTF, spot diagrams, and more. Tilts, decenters, polynomial aspheres, stops all supported. Schott Glass catalog. Recent changes: tolerancing, multi-processor parallelization, tests, version numbers. Bugs: Undoubtedly! Some might even be egregious. [Update - yep, a couple that need fixing.] [Updated update - current version fixed them.] So watch out. Screenshot.

NOTE: The tcl/tk/tclx packages will not compile out-of-the-box on Fedora Core 6 (and presumably other recent Linux distributions). The problem is due to some bugs in the supplied "configure" scripts that were innocuously ignored in older Linux (and probably Unix) distributions. Patches will be developed. Hand editing of the configure scripts is also possible (it's just a few lines).
Version v3_10: 2006-Aug-18. Updates: Allow for finite object conjugate. Converted from ".len" format to ".lns" (to avoid ambiguity with OSLO). Added Mars Rover designs. Better mapping of entrance pupil for fish-eye lenses.
Version v3_8: 2005-May-11. Updates: Fixed a pair of egregious bugs (in "rtrace": obey stopcheck flag; calculation of location of exit pupil fixed for multiconfiguration systems), add zernike shapes to surfaces, read simple Zemax files, added entrance pupil calculation, allow finite distance for source (not everything updated for that yet), add calculation of "whiskers" for weak lensing. New designs added. Least squares routines now use adaptive step size.
Version v3_6: 2004-Jul-24. Updates: Added LSST design; reorganized data directory to add subdirectories, added ability to make FITS files from geometric spot diagrams; lots of bug fixes and minor enhancements.
Binaries for Linux.
Source for above. Compiles on most major Unix/Linux systems.

CAUTION!!! The above files include several optical designs for projects that are currently in the R&&D phase. These designs are not final, and in some cases (such as LSST and SNAP) are now obsolete. They are still useful for some types of studies but should be understood to not represent the final system.

FOR SNAP PROJECT PEOPLE:

In the top-level directory of the binaries, there are two shell procedures - snapdiff and lsstspot - that can be used to create PSFs in FITS files. Each shell procedure takes the name of a file as input. Each file contains optional keyword-value pairs. The usage is as follows:

To make a FITS file with the SNAP PSF:

USAGE: "snapdiff <paramfile>"
Optional parameters:

    PIXMM   Size of one pixel in mm (.001 is a nice value to start)
    NPIX    Total size of image (must be even, 512 is nice)
    FILTER  Filter 1 is .44 microns, filter 9 is 1.55 microns.
    XMM     Position in the focal plane (max 283 mm radius)
    YMM 
    OUTPUT  Name of output file

    X surf offset       (mm)
    Y surf offset       (mm)
    Z surf offset       (mm)
    THETA surf offset   (radians)
    PHI surf offset     (radians)
    CURV surf offset    (inverse mm)
    CCON surf offset    (dimensionless)
    surf: 1 = primary, 2 = secondary, 3 = tertiary, 4 = focal plane

To make a FITS file with the LSST PSF:

USAGE: "lsstspot <paramfile>"
Optional parameters:

    SCALE   Size of one pixel in arcsec (.05 is nice)
    NPIX    Total size of image (128 is nice)
    SIGMA   Blur in arcsec (to smooth out spot diagram) (.2 is nice)
    FILTER  Filter 1 to 6 for U, B, V, R, I, Z
    XMM     Position in the focal plane (max 275 mm radius)
    YMM 
    OUTPUT  Name of output file (default is spot7.fit)

    X surf offset       (mm)
    Y surf offset       (mm)
    Z surf offset       (mm)
    THETA surf offset   (radians)
    PHI surf offset     (radians)
    CURV surf offset    (inverse mm)
    CCON surf offset    (dimensionless)
    surf: 1 = primary, 2 = secondary, 3 = tertiary
    surf: 4 = Lens C1, 5 = Lens C2,   6 = filter
    surf: 7 = Lens C3, 8 = focal plane

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Star Densities in the 9 SNAP filter bands.

Calibrations

Raytrace optical design program

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