First results from application of protected silver coatings to
DEIMOS in April 2005.
Photos
- Coated tent mirror, front illumination.
[small,
large]
- Coated tent mirror, rear illumination. Note pinholes in
central region.
[small,
large]
- Coated tent mirror, rear illumination, seen face on.
Note diagonal shape of pinholes.
[small,
large]
- Scotch tape test on corner of tent mirror cleanly
removed the coating.
[small,
large]
Reflectance Curve
The following plots compares various reflectance curves:
- Apr 2005 Gemini protected
silver on DEIMOS tent mirror (measured by Tim Saloga -- preliminary!)
- Dec 2004 Gemini protected silver coating (measured by Lick)
- Definitive measurement of 2001 LLNL Ag-on-Al coating
applied to LRIS collimator (measured by ORA)
- Bare Al (NIST standard)
- Bare Ag (Allen's Astrophsyical Quantities, Table 5.21)