Specific Parameters for BARR's H Filters

Filter ID #
Short HPP (300K)
Long HPP (300K)
Short HPP (77K)
Long HPP (77K)
1
1.505
1.817
1.475
1.781
2
1.505
1.816
1.475
1.780
3
1.504
1.814
1.474
1.778
4
1.504
1.810
1.474
1.774
5
1.501
1.810
1.471
1.774
6
1.501
1.820
1.471
1.784
7
1.498
1.814
1.468
1.778
8
1.504
1.821
1.474
1.785

Note: BARR's measurements were performed at 300K. The values given for 77K were calculated by applying a 2% blueward shift to the wavelengths (expected shift to be from 1 - 3%).

All values given in nm.


Postscript of a typical transmission curve scan for a standard BARR H filter performed at 77K.

François Piché

Latest Revision: July 11, 1997