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US 8,786,854 B2Granted
Spectroscopic detector
AssigneeOlympus Corporation
InventorYuya Miyazono
Life of this patent
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Abstract
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.
Claims3
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.
3 more elements
Dependencies are inferred from the claim text.