Patent ID: 6243163
Filing Date: 2001-06-05
Classification: G01J

Abstract:
A wavelength detector which enters a reference light emitted from a reference light source and a light to be detected emitted from a source of light to be detected into a spectroscope, guides the reference light and the light to be detected to a sensor, and calculates a wavelength of the light to be detected on the basis of detection positions of the reference light and the light to be detected on the sensor, a characteristic value of the spectroscope and a known wavelength of the reference light, wherein:at least two reference lights having different wavelengths are emitted as the reference light from the reference light source;an actual characteristic value of the spectroscope is calculated on the basis of detection positions of the at least two reference lights on the sensor and known wavelengths of the at least two reference lights; andthe wavelength of the light to be detected is calculated on the basis of the detection positions of the reference lights and the light to be detected on the sensor, the calculated actual characteristic value of the spectroscope and the known wavelengths of the reference lights.