Design of compact IR zoom telescope

Ruiyi Chen; Xiuli Zhou; Xingde Zhang

doi:10.1117/12.48769

1 December 1991 Design of compact IR zoom telescope

Ruiyi Chen, Xiuli Zhou, Xingde Zhang

Proceedings Volume 1540, Infrared Technology XVII; (1991) https://doi.org/10.1117/12.48769
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A compact IR zoom telescope with diameter/length = 94/159 mm and magnification from 2 to 6 times at 8-12 microns is designed. Mechanically compensated zoom is adopted. Zooming lens and compensating lens groups possessing three roller followers for each are controlled by the stationary control cylinder on which there are three pairs of cam slots to which six followers are attached. When the outer cylinder having six linear slots is rotated, it will force the followers (i.e., the two lens mountings) to turn, resulting in smoothly turning and moving the two. The effect of air gap between the follower and the slot on backlash in the cam track is eliminated by special design of elastic construction of the roller follower. The image quality examed by MTF testing is satisfactory.

Citation Download Citation

Ruiyi Chen, Xiuli Zhou, and Xingde Zhang "Design of compact IR zoom telescope", Proc. SPIE 1540, Infrared Technology XVII, (1 December 1991); https://doi.org/10.1117/12.48769

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