Study on segmentation and  alignment related  effects in  a 10m class telescope

Annu Jacob; Padmakar Singh Parihar; Melvin K. James; Radhika Dharmadhikari

doi:10.1117/12.2629948

29 August 2022 Study on segmentation and alignment related effects in a 10m class telescope

Annu Jacob, Padmakar Singh Parihar, Melvin K. James, Radhika Dharmadhikari

Proceedings Volume 12182, Ground-based and Airborne Telescopes IX; 1218224 (2022) https://doi.org/10.1117/12.2629948
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Indian astronomers are aiming to build a large 10m class optical-NIR telescope, equipped with state-of art instruments. After exploring many potential design options, we ended up with two mirror Ritchey-Chretien (RC) type design, which provide diffraction limited performance over a sufficiently large field and delivers decent image quality over fairly extended field. The segmented primary mirror is a natural choice for the proposed 10m class telescope. However, unlike monolithic primary mirror, various factors linked with the segmentation plays very critical role to decide the performance of the telescope. In great detail, we have also studied the effect of the segment piston, tip and tilt, clocking, the radius of curvature, the shear, the segment size, inter-segment gap as well as figuring error on the telescope performances. All these studies are conducted using a custom developed generic python-based tool that can be used along with ZEMAX ray-tracing software. In this paper we present the optical design of proposed 10m class telescope as well as our extensive study on segmentation and alignment related effects.

Citation Download Citation

Annu Jacob, Padmakar Singh Parihar, Melvin K. James, and Radhika Dharmadhikari "Study on segmentation and alignment related effects in a 10m class telescope", Proc. SPIE 12182, Ground-based and Airborne Telescopes IX, 1218224 (29 August 2022); https://doi.org/10.1117/12.2629948

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