SkyMapper Filter Set: Design and Fabrication of Large-Scale Optical Filters

被引:74
作者
Bessell, Michael [1 ]
Bloxham, Gabe [1 ]
Schmidt, Brian [1 ]
Keller, Stefan [1 ]
Tisserand, Patrick [1 ]
Francis, Paul [1 ]
机构
[1] Australian Natl Univ, RSAA, Mt Stromlo Observ, Weston, ACT 2611, Australia
关键词
INTERFERENCE FILTER; SKY SURVEY; H-ALPHA;
D O I
10.1086/660849
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The SkyMapper Southern Sky Survey will be conducted from Siding Spring Observatory with u, v, g, r, i, and z filters that comprise glued glass combination filters with dimensions of 309 x 309 x 15 mm. In this article we discuss the rationale for our bandpasses and physical characteristics of the filter set. The u, v, g, and z filters are entirely glass filters, which provide highly uniform bandpasses across the complete filter aperture. The i filter uses glass with a short-wave pass coating, and the r filter is a complete dielectric filter. We describe the process by which the filters were constructed, including the processes used to obtain uniform dielectric coatings and optimized narrowband antireflection coatings, as well as the technique of gluing the large glass pieces together after coating using UV transparent epoxy cement. The measured passbands, including extinction and CCD QE, are presented.
引用
收藏
页码:789 / 798
页数:10
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