skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultraviolet spectrograph lens

Journal Article · · Proc. Soc. Photo-Opt. Instrum. Eng.; (United States)
OSTI ID:5079077

A 700-mm f/4.7 spectrograph camera lens was designed for imaging spectral lines in the 200 to 400-nm region on a 120-mm flat image field. Lens elements of fused silica and crystalline calcium fluoride have so little secondary spectrum that raytracing calculations predict a monochromatic resolution limit of 30 lines/mm without refocusing in the 238- to 365-nm region. Light scattering at the polished calcium-fluoride surfaces is avoided by sandwiching the fluoride elements between fused silica and cementing with silicone fluid. The constructed lens makes good spectrograms.

Research Organization:
Los Alamos National Lab., NM
OSTI ID:
5079077
Journal Information:
Proc. Soc. Photo-Opt. Instrum. Eng.; (United States), Vol. 288
Country of Publication:
United States
Language:
English