Optimization of telescope focal ratios for MLA-fiber coupled Integral Field Units

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.

References in corpus (6)

• SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
• The MUSE second-generation VLT instrument
• The Sydney-AAO Multi-object Integral field spectrograph (SAMI)
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• PMAS: The Potsdam Multi Aperture Spectrophotometer. II. The Wide Integral Field Unit PPak
• End effects in optical fibres