Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 15, 2010 | Published
Book Section - Chapter Open

Optics for MUSIC: a new (sub)millimeter camera for the Caltech Submillimeter Observatory


We will present the design and implementation, along with calculations and some measurements of the performance, of the room-temperature and cryogenic optics for MUSIC, a new (sub)millimeter camera we are developing for the Caltech Submm Observatory (CSO). The design consists of two focusing elements in addition to the CSO primary and secondary mirrors: a warm off-axis elliptical mirror and a cryogenic (4K) lens. These optics will provide a 14 arcmin field of view that is diffraction limited in all four of the MUSIC observing bands (2.00, 1.33, 1.02, and 0.86 mm). A cold (4K) Lyot stop will be used to define the primary mirror illumination, which will be maximized while keeping spillover at the sub 1% level. The MUSIC focal plane will be populated with broadband phased antenna arrays that efficiently couple to factor of (see manuscript) 3 in bandwidth, and each pixel on the focal plane will be read out via a set of four lumped element filters that define the MUSIC observing bands (i.e., each pixel on the focal plane simultaneously observes in all four bands). Finally, a series of dielectric and metal-mesh low pass filters have been implemented to reduce the optical power load on the MUSIC cryogenic stages to a quasi-negligible level while maintaining good transmission in-band.

Additional Information

© 2010 SPIE. We acknowledge the assistance of: Sean Lin and Jaime Luna of NASA's Jet Propulsion Laboratory, who engineered the relay optics for the CSO, Marton Precision Manufacturing, Inc. for building the relay optics, Marc Runyan and Randol Aikon for insights from their work developing optical components for SPIDER and BICEP II, Diana Bisel, Kathy Deniston, and BarbaraWertz for exceptional administrative assistance, and the Hilo-based staff of the CSO for help with the design and ongoing installation of the new relay optics. The MKID Camera project is supported by NSF grant AST-0705157 to the University of Colorado, NASA grant NNGC06C71G to Caltech, the Gordon and Betty Moore Foundation, NASA grant NNX10AC83G, and the JPL Research and Technology Development Fund. We are grateful to the Xilinx corporation for their generous donation of the FPGAs needed for the readout electronics. Jack Sayers was supported by a NASA Postdoctoral Program Fellowship and James Schlaerth and Nicole Czakon were partially supported by NASA Graduate Student Researchers Program Fellowships. The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

Attached Files

Published - 77410W_1.pdf


Files (5.2 MB)
Name Size Download all
5.2 MB Preview Download

Additional details

August 19, 2023
March 5, 2024