Design Of A 1-m Unobscured Infrared Collimator And Laser Tracker Test System

S. R. Lange

doi:10.1117/12.957894

29 November 1979 Design Of A 1-m Unobscured Infrared Collimator And Laser Tracker Test System

S. R. Lange

Proceedings Volume 0193, Optical Systems in Engineering I; (1979) https://doi.org/10.1117/12.957894
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

The large collimator is designed to test laser tracking systems with apertures as large as 1 m. To reduce the l-m aperture of the large collimator to a reasonable working size, two confocal parabolas (Mersenne) reimage the pupil to 0.1 m with a 1.4-m off-axis parabola decentered 1 m. Near the reimaged pupil two cylindrical mirrors are used to introduce near-field defocus and astigmatism while a two-axis tilt mirror simulates target motion and atmospheric tilts. A second Mersenne reduces the beam size further with the intermediate focus used for far-field atmospheric turbulence and thermal blooming simulation. A bandpass beamsplitter allows the incoming laser beam to proceed to a laser analyzer section, for directional and spot size information, while allowing the infrared radiation from the target to pass to the tracker. A large focal ratio allows for zooming the target by a "trombone" set of movable mirrors and fixed target. Rotation is provided by a K-mirror image rotator. The optics are chilled in a cold box and situated on an optical bench in a van for transportation.

Citation Download Citation

S. R. Lange "Design Of A 1-m Unobscured Infrared Collimator And Laser Tracker Test System", Proc. SPIE 0193, Optical Systems in Engineering I, (29 November 1979); https://doi.org/10.1117/12.957894

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