Transmission data for the KPNO Mosaic Rhoads 820Rv2 filter (aka 823) (k1047)


Below is the transmission curve for this filter in parallel light.

Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See the plot at the bottom of the page.

Note: This is a replacement of the old Rhoads 823 filter (k1027) was purchased. See below for a comparison of the two filters.

Click here to get the ASCII version of the above plot.
Click here to get the Postscript version of the above plot.

Click here to get the ASCII version of the above plot.
Click here to get the Postscript version of the above plot.


A comparison of this filter with the newer version (k1047):


Below is a plot of this filter as simulated in different f/ratio beams. At the KPNO 4m f/3.1 the properties of this filter are:
CWL= 8193.49A FWHM= 68.30A PEAK TRANSMISSION= 89.71% at 8182A

Click here for ASCII version of the simulation data from the above plot.
Click here for the Postscript version of the above plot.



Last updated February 9, 2004 by Heidi Schweiker