Optimization of telescope focal ratios for MLA-fiber coupled integral field units

Sabyasachi Chattopadhyay; Matthew A. Bershady; Marsha J. Wolf; Michael P. Smith

doi:10.1117/12.2562900

16 December 2020 Optimization of telescope focal ratios for MLA-fiber coupled integral field units

Sabyasachi Chattopadhyay, Matthew A. Bershady, Marsha J. Wolf, Michael P. Smith

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 1145168 (2020) https://doi.org/10.1117/12.2562900
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

We have developed an analytic model for generic image transfer using microlens-coupled fibers to determine the telescope input beam speed that optimizes the lenslet clear aperture and minimizes fiber focal-ratio degradation. Assuming fibers are fed at f/3.5 by the lenslets, our study shows that f/11 is the optimum telescope beam speed to feed a lenslet coupled to a fiber with a 100um diameter core. These considerations are relevant for design of high-efficiency dedicated survey telescopes that employ lenslet-coupled fiber systems.

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Citation Download Citation

Sabyasachi Chattopadhyay, Matthew A. Bershady, Marsha J. Wolf, and Michael P. Smith "Optimization of telescope focal ratios for MLA-fiber coupled integral field units", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 1145168 (16 December 2020); https://doi.org/10.1117/12.2562900

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