Physics – Optics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.7191w&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 31, no. 34, p. 7191-7197.
Physics
Optics
3
Interferometry, Metrology, Mirrors, Optical Correction Procedure, Optical Measuring Instruments, Adaptive Optics, Asphericity, Instrument Errors, Polishing
Scientific paper
We describe a relatively simple, but highly effective, approach to the system design and alignment of an all-refractive Offner null corrector and phase-measuring Shack cube interferometer. In addition we outline procedures for fabricating and testing the optical components. Allowable errors for all parameters are determined by a tolerance analysis that separates axisymmetric and residual figure errors. An open construction optics frame provides a high degree of metering flexibility by incorporating simple kinematic mounts that provide adjustment of each lens while also allowing the lens to be removed and replaced with greater than 2 microns absolute repeatability. Nonaxisymmetric alignment errors are removed by rotating the optics on a high-precision bearing. Axial spacings are measured with contact transducers attached to both ends of an Invar metering rod. Two completed systems have guided the stressed-lap polishing of 1.8-m f/1.0 and 3.5-m f/1.5 aspheric mirrors.
Anderson David S.
Burge James H.
Ketelsen Dean A.
Martin Heath M.
Murgiuc C.
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