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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 13,
  • Issue 11,
  • pp. 110501-
  • (2015)

Concave grating miniature spectrometer with an expanded spectral band by using two entrance slits

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Abstract

A new miniature spectrometer with two entrance slits is proposed to expand the spectral band. The proposed spectrometer is designed such that the two entrance slits share the same concave grating and detector array. The two slits are located at different positions such that the spectral range of the same light source incident on the detector array varies greatly between the two slits. Only one of the two slits is illuminated at a given time; as such, the two spectral ranges are sequentially measured. Theoretical calculation and experimentation are conducted to verify the proposed design.

© 2015 Chinese Laser Press

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