This page gives the filter specs and a report on the status of
the various orders. There are also links to the filter profiles.
Information about the Gemini Consortium filter sepcifications are here
Useful technical background on the choice of Gemini filter specifications is here . Gemini recommended a narrow J than standard to avoid OH lines and water vapour absprption edges. They claimed that the J sky would be 0.5 magnitudes fainter in their J filter which is 40% narrower than the standard Barr J.
Plots of Eric Persson's LCO Filters are here
Barr Associates have useful online information about filters and general and their own filter sets. The division of Barr Associates that deals with Astronomical Filters is the Scientific Products Devision.
They have a useful page which summarises their astronomical filters , including their IR filter specifications.
|6||1.55||1.50||0.80||2.30||95||received Sept 98|
Notes: Numbers for yet to be received filters are design
expectations. Numbers for received filters are achieved performances.
All performances given for 77K operating temperature and a collimated beam.
For further information and detailed filter profiles, click on
the filter name you are interested in.
Original page by François Piché
Last Revision: Febuary 25, 1999 by rgm