Transmissive diffractive membrane optic for large aperture lightweight optical telescope

Yue Zhang; Jianchao Jiao; Baohua Wang; Jiangao Jin; Yun Su

doi:10.1117/12.2190602

5 August 2015 Transmissive diffractive membrane optic for large aperture lightweight optical telescope

Yue Zhang, Jianchao Jiao, Baohua Wang, Jiangao Jin, Yun Su

Proceedings Volume 9622, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology; 96220G (2015) https://doi.org/10.1117/12.2190602
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

Transmissive diffractive membrane optic can be used in space optical telescope to reduce the size and mass of imaging system. Based on the international research results about transmissive diffractive membrane, a 4-level diffractive substrate with 100mm apertures was designed and transmissive diffractive membrane was fabricated by spin coating. High-precision support structure for diffractive membrane with surface precision 0.12λ RMS (λ=632.8nm) was introduced, and that can meet the diffractive imaging requirements. Diffraction efficiency of the diffractive membrane supported by support structure was tested, and the test results showed that diffraction efficiency was >50%. The step figure test results illustrated the etched deep precision was less the 10nm. The imaging wavefront test result demonstrated a wavefront error of about 38 nm RMS. The transmissive diffractive membrane optic can be very useful for large aperture imaging system to realize low mass and low cost.

Citation Download Citation

Yue Zhang, Jianchao Jiao, Baohua Wang, Jiangao Jin, and Yun Su "Transmissive diffractive membrane optic for large aperture lightweight optical telescope", Proc. SPIE 9622, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 96220G (5 August 2015); https://doi.org/10.1117/12.2190602

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