Acta Optica Sinica, Volume. 39, Issue 11, 1122003(2019)
Catadioptric Testing of Large Aperture Convex Hyperboloid Surfaces
In the testing of convex hyperboloid surfaces, the required auxiliary mirror is too large to manufacture. A new method of testing is proposed herein to solve this problem. Based on the Hindle test, the correcting lens and the spherical mirror produce a ray that has no aberration and is incident to the test surface. The distance between auxiliary mirror and hyperboloid mirror is short. This reduces the aperture of the auxiliary mirror, while the effective aperture does not reduce. The formula is derived based on the third-order aberration theory. A test optical system is designed, wherein the aperture of the mirror being tested is 800 mm, the vertex radius is 1800 mm, and the conic constant is -2.25. The peak-valley value of the residual aberration is 0.0003λ (λ=632.8 nm), and the root mean square is 0.0001λ. The analysis shows that this method can be used to test large aperture and large relative aperture convex hyperboloid surfaces with a small auxiliary mirror and short length.
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Pengwei Zhao, Jinping Zhang, Lu Ye, Liehua Zheng. Catadioptric Testing of Large Aperture Convex Hyperboloid Surfaces[J]. Acta Optica Sinica, 2019, 39(11): 1122003
Category: Optical Design and Fabrication
Received: Apr. 9, 2019
Accepted: Jul. 25, 2019
Published Online: Nov. 6, 2019
The Author Email: Zheng Liehua (dimo818@126.com)