Spectroscopic detector

摘要

A spectroscopic detector includes a spectroscopic element for dispersing light, a photodetector for detecting the light dispersed by the spectroscopic element and a condensing optical system for condensing the dispersed light to the photodetector and compensating for a deviation in a detected wavelength deriving from nonlinearity of the angle of emergence generated in the spectroscopic element through chromatic aberration of magnification.

主权项

1. A spectroscopic detector comprising:
a spectroscopic element which disperses light; a photodetector which detects the light dispersed by the spectroscopic element; and a condensing optical system which condenses the dispersed light to the photodetector, and which compensates for a deviation in a detected wavelength deriving from nonlinearity of an angle of emergence generated in the spectroscopic element through chromatic aberration of magnification; wherein assuming λ1 is a minimum value of wavelengths captured by the photodetector, λ2 is a maximum value of wavelengths captured by the photodetector, δ1 is chromatic aberration of magnification at a maximum image height of the condensing optical system with respect to light of wavelength λ1, and δ2 is chromatic aberration of magnification at a maximum image height of the condensing optical system with respect to light of wavelength λ2, the following conditional expression is satisfied: δ1>δ2.