CFHT Interference Filter Database Code Explanation for Visible Filters

HTML version created by Greg Barrick

Maintained by Greg Barrick

Last updated: 29 December 2004

Send comments to barrick@cfht.hawaii.edu.

A numbering system has been adopted to organize the filter database. The filters are numbered based on a 4 digit code.The following diagram explains the coding system for the visible filters. The system for the IR filters is similar, and is explained on the IR code page.

      
     ex.:      1  5 04 
               |  |  |
               |  |  -------  order sequence # (4th filter with 15 as prefix) 
               |  | 
               |  ----------  first number of central wavelength (5430 Ang)     
               |               
               -------------  size and/or instrument to be used with:
 
                         1 :    50.8x50.8 mm will fit in FOCAM 
                         2 :    50.8x50.8 mm will NOT fit in FOCAM 
                         3 :    50.8 mm round   
                         4 :    76.2 mm round   (Fabry-Perot, MOS/SIS) 
                         7 :    85.0, 152.4 mm sq(MOCAM, UH8k) or
                                165x250 mm (CFH12k) 
                         9 :    300 mm square (MegaPrime)

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