We have developed and tested an antireflection (AR) coating method for
silicon lenses used at cryogenic temperatures and millimeter wavelengths. Our
particular application is a measurement of the cosmic microwave background.
The coating consists of machined pieces of Cirlex glued to the silicon.
The measured reflection from an AR-coated flat piece is less than
© 2006 Optical Society of America
Original Manuscript: August 31, 2005
Revised Manuscript: October 15, 2005
Manuscript Accepted: October 26, 2005
Judy Lau, Joseph Fowler, Tobias Marriage, Lyman Page, Jon Leong, Edward Wishnow, Ross Henry, Ed Wollack, Mark Halpern, Danica Marsden, and Gaelen Marsden, "Millimeter-wave antireflection coating for cryogenic silicon lenses," Appl. Opt. 45, 3746-3751 (2006)