Monochromator and optical spectrum analyzer using the same

Details Monochromator and optical spectrum analyzer using the same Monochromator and optical spectrum analyzer using the same

2005-04-12

2005-04-12

Launchman, Layla (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

C356S331000

Reexamination Certificate

active

06879396

ABSTRACT:
A monochromator including: a concave mirror which converts incident light into parallel light and emits the parallel light, a plane diffraction grating for diffracting the parallel light emitted from the concave mirror, first reflection means which reflects first light diffracted by the plane diffraction grating and causes the diffracted light to enter the plane diffraction grating as second incident light, second reflection means which reflects second diffracted light and causes the reflected light to enter the plane diffraction grating as third incident light, and an exit slit disposed in the vicinity of a focal point such that third diffracted light is reflected by the first reflection means, to thereby enter the plane diffraction grating as fourth incident light and such that fourth diffracted light is converged at the focal point by the concave mirror, to thereby enable extraction of light having a specific wavelength.

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