Development of a compact tool for sealing the compensator group in final stages of alignment

J. Arasa; E. Oteo; P. Blanco; S. Royo; A. Cifuentes

doi:10.1117/12.828879

10 September 2009 Development of a compact tool for sealing the compensator group in final stages of alignment

J. Arasa, E. Oteo, P. Blanco, S. Royo, A. Cifuentes

Proceedings Volume 7424, Advances in Optomechanics; 74240S (2009) https://doi.org/10.1117/12.828879
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

A high-precision, low-cost tool for optimal alignment of a compensator group in anamorphic objectives is presented. The system provides highly accurate information by analyzing the axis and field PSFs in the focal plane of the optical system under test. The PSFs are provided by a bundle of 9 different pigtailed laser diodes placed in the object field, and they are recorded by a lensless 2/3" CCD camera. The comparison of the simulated and obtained PSFs allows determining the optical element introducing the differences so action may be taken precisely on that element. The system is especially useful in non-rotationally symmetrical systems, where errors in axis position result into asymmetries of the PSF images. The tool is used for precise alignment of the cylindrical lenses in the compensator group of an anamorphic objective prior to sealing. Results show the system is able to detect misalignments of 100μm and axis positioning errors of just 30arcsec using off-the-shelf components without the need of high-precision positioning equipment.

Citation Download Citation

J. Arasa, E. Oteo, P. Blanco, S. Royo, and A. Cifuentes "Development of a compact tool for sealing the compensator group in final stages of alignment", Proc. SPIE 7424, Advances in Optomechanics, 74240S (10 September 2009); https://doi.org/10.1117/12.828879

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KEYWORDS

Point spread functions

Optical testing

Optical components

Semiconductor lasers

Objectives

Collimators

CCD image sensors

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