NICS - Barr Filters

"J" is the "standard" filter manufactured by Barr. It is mounted inside NICS tilted by about 3 degrees. Its transmission was measured directly inside the instrument by taking a series of spectra of a halogen lamp without and with the filter inserted before the AMICI, IJ and JH dispersers. No significant (>10-4) out-of-band leak was found within the 0.8-2.6 µm wavelength range.
The resulting transmission curves, measured at a temperature of about 78 K, is available in the following ASCII file.

For any comments please contact Francesca Ghinassi.