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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 47,
  • Issue 11,
  • pp. 1913-1919
  • (1993)

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

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Abstract

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 <i>f</i>1.8. The performance of the instrument is demonstrated for fiber-optic probe and microprobe Raman spectroscopy.

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