Optical spectrum separation apparatus

Details Optical spectrum separation apparatus Optical spectrum separation apparatus

1997-01-30

1998-05-05

Evans, F. I.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

356328, G01J 306, G01J 318

Patent

active

057483108

ABSTRACT:
A high-precision spectrum separation apparatus enables to generate an output beam having a specific wavelength from a multi-wavelength input beam. The input beam is focused on a diffraction grating through a focusing lens to generate a number of diffracted component beams, of which a diffracted component beam having a specific wavelength is directed to an output slit, resulting in an output beam having well-defined spectral properties. When the output beam is required to have a band of wavelengths, the fixed focal distance of the focusing lens is shorter than is required to generate well-defined output beam, resulting that the diffracted component beam cannot be focused precisely on the output slit. In such a case, a flat glass plate is introduced between the focusing lens and the output slit to adjust the focal-point of the focusing lens so that the diffracted component beams are focused precisely on the output slit. An output beam having well-defined spectral properties is thus produced from the apparatus.

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