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Chin. Opt. Lett.
 Home  List of Issues    Issue 10 , Vol. 14 , 2016    10.3788/COL201614.100801


Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process
Tong Yang, Jun Zhu, and Guofan Jin
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, [Tsinghua University], Beijing 100084, China

Chin. Opt. Lett., 2016, 14(10): pp.100801

DOI:10.3788/COL201614.100801
Topic:Geometric optics
Keywords(OCIS Code): 080.4228  080.4035  220.2740  

Abstract
In this Letter, we propose a novel configuration and design method of freeform, dual fields-of-view (FOVs), dual focal lengths, off-axis three-mirror zoom imaging systems. The switch of the two zooms is achieved by rotating a single mirror element. The design of a freeform, dual focal lengths zoom system is realized by a point-by-point design approach for the first time to our knowledge. This method enables the direct design of freeform surfaces from initial planes using given system specifications and configuration, and the designed system can be taken as a good starting point for further optimization. A freeform, dual FOVs, dual focal lengths, off-axis three-mirror zoom system is demonstrated. The F-numbers of the two zooms are 2 and 2.4. The dual FOVs are 3°×3° and 2.5°×2.5°. After final optimization, both of the zooms achieve high performances.

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Received:2016/6/14
Accepted:2016/8/26
Posted online:2016/9/30

Get Citation: Tong Yang, Jun Zhu, and Guofan Jin, "Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process," Chin. Opt. Lett. 14(10), 100801(2016)

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