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Axial Transmissive f/1.8 Imaging Raman Spectrograph with Volume-Phase Holographic Filter and Grating

Volume 47, Number 11 (Nov. 1993) Page 1913-1919

Battey, David E.; Slater, Joseph B.; Wludyka, Ronald; Owen, Harry; Pallister, David M.; Morris, Michael D.


An axial transmissive Raman spectrograph is described. The instrument employs volume-phase holograms as the laser line rejection filter and transmission grating. The on-axis configuration and the use of a high-spatial-frequency transmission grating allows nearly diffraction-limited imaging and pixel-limited resolution at f1.8. The performance of the instrument is demonstrated for fiber-optic probe and microprobe Raman spectroscopy.