AI Article Synopsis
- A new method was developed using a novel computer-generated hologram (CGH) to effectively test large convex aspheric surfaces, featuring two zones with varying power levels.
- This CGH design addresses challenges in measuring the central region of convex surfaces and eases requirements for illumination optics and CGH setups.
- An optical test system was successfully designed with this CGH to evaluate a 150 mm-diameter convex surface, with simulation results validating its effectiveness for measuring large and deep convex shapes.
Article Abstract
We proposed a valid method with a novel computer-generated hologram (CGH) to test large-aperture convex aspheric. The CGH consisted of two zones with different amounts of power: the central zone has a larger amount of power than the marginal zone. Compared with other CGHs used for convex aspheric testing [SPIE.2576.258 (1995)], it could overcome the difficulty of measuring the central region of the convex surface under test, while relaxing the requirement for the illumination optics and CGH of the test system. We have designed an optical test system with the novel CGH to test a 150 mm-diameter convex surface with full aperture by using optical design software Zemax. The simulated result verified the efficiency of the novel CGH. It is believed that this kind of CGHs can be used to measure any large and deep convex surface with full aperture.
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| http://dx.doi.org/10.1364/oe.15.003120 | DOI Listing |
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