FINK SPECTROGRAPH
=================

  Instrument Overview                                                         
  ===================                                                         
    The following description is excerpted from Fink et al. 1980.             
    [FINKETAL1980].                                                           
                                                                              
    The Fink Spectrograph was built at the Lunar and Planetary                
    Laboratory and was designed to make opimum use of the CCD array.          
    It employed a transmission grating and had a spectral range of            
    5700-11000 Angstroms and a maximum first order resolution of 11           
    Angstroms.  The long-wavelength limit was determined by the CCD           
    sensitivity cutoff and in practice was close to 1.06 microns.  The        
    short-wavelength limit followed the sharp cutoff of a Schott OG           
    570 filter which eliminated overlapping orders.                           
                                                                              
    The CCD was manufactured by Texas Instruments and contained               
    500x500 elements, each being 15.2 microns square.  During its             
    operation it was cooled to ~120 degrees C to minimize dark noise.         
    The detector and associated electronics were part of a                    
    ground-based system built at the California Institute of                  
    Technology for use by the Space Telescope Wide Field Planetary            
    Camera investigation definition team.

References
==========

Fink, U., B.A. Smith, C. Benner, J.R. Johnson, and  
        H.J. Reitsema, Detection of a CH4 atmosphere on Pluto.  Icarus 44,    
        62-71, 1980.