EPJ Web Conf.
Volume 215, 2019EOS Optical Technologies
|Number of page(s)||2|
|Section||Manufacturing, Tolerancing and Testing of Optical Systems (MOS) – Session 4|
|Published online||10 September 2019|
Testing the transmitted wavefront of large aperture long-focallength lens using a multizone computer-generated hologram
Chengdu Fine Optical Engineering Research Center, 610041 Chengdu, China
* Corresponding author: email@example.com
Published online: 10 September 2019
A method for testing the transmitted wavefront of large aperture long-focal-length lens with a multizone computer-generated hologram (CGH) is proposed. The multizone CGH has 5 zones: one main zone for the null testing of long-focal-length lens and four auxiliary zones for the pre-alignment of measured lens. Both 1st order wavefront and 0th order wavefront of CGH are measured, and 0th order wavefront is used to calibrate the substrate error. To verify this test approach, a 450mm×450mm multizone CGH is designed and fabricated for testing the spatial filter lens. Experiments and error analysis are carried out. The results show that the desired precision can be reached with use of CGH.
© The Authors, published by EDP Sciences, 2019
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