Alignment of a three-mirror off-axis telescope by reverse optimization

Details Alignment of a three-mirror off-axis telescope by reverse optimization Alignment of a three-mirror off-axis telescope by reverse optimization

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991opten..30..307l&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 30, Mar. 1991, p. 307-311.

Physics

6

Aberration, Computerized Simulation, Mirrors, Telescopes, Computer Aided Design, Focal Plane Devices, Position Indicators, Position Sensing, Translational Motion

Scientific paper

A three-mirror off-axis telescope was aligned by ray aberration measurement and reverse optimization, which is the technique of creating a computer model of the telescope in its misaligned state. A set of Hartmann measurements were made at multiple field points and multiple focus planes. The Hartmann data were then used as targets for the ACCOS V lens design code that created via least squares optimization a misaligned model of the telescope to match the measurements. The physical telescope components were then moved opposite the misalignments of the model. The Hartmann pattern was generated using a five-hole Hartmann screen and measured by the use of a position-sensing, lateral-effect photodiode. The results show this method is a viable tool for assisting in the alignment of optical systems.

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