Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet

Details Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4139..122l&link_type=abstract

Proc. SPIE Vol. 4139, p. 122-130, Instrumentation for UV/EUV Astronomy and Solar Missions, Silvano Fineschi; Clarence M. Korendy

Astronomy and Astrophysics

Astronomy

Scientific paper

The stimulus for ultraviolet flat fields (STUFF) was developed to supply spatially flat, broadband, far ultraviolet irradiance in thermal vacuum testing of the Solar Blind Channel (SBC) of the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) which will fly on Servicing Mission 3b in mid-2001. Because the SBC's 1K X 1K multi-anode microchannel array (MAMA) detector has a global count rate limit of about 300,000 events/s, it takes a minimum of roughly 10 hours of expensive test time in thermal vacuum to collect a deep flat field having 10,000 signal counts in each pixel (1% certainty in Poisson statistics). As such, a diffuser with far ultraviolet (FUV) throughput substantially higher than conventional state-of-the-art Lambertian diffuser material was sought to insure that the length of flat field exposures could be minimized. An FUV diffuser with concentrating properties was conceived as the overcoating of the convex lens side of commercially available microlens array material with Goddard Space Flight Center's (GSFC) standard aluminum-magnesium fluoride coating optimized for reflectance at 120 nm. The concept for this diffuser, a geometric optical model of its performance, visible light measurements to test that model, and the diffuser's FUV performance in STUFF relative to conventional diffuser material is presented.

Affiliated with

Also associated with

No associations

Rating

Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microlens array coated as a high-efficiency reflective diffuser for the vacuum ultraviolet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1161091