Spectrometer
AssigneeSeiko Epson Corporation
InventorTatsuaki Funamoto
Life of this patent
Estimating the term…
Abstract
A spectrometer includes: a tungsten lamp which emits light with no peak wavelength within a wavelength range of visible light and having a light amount increasing as the wavelength becomes longer; a violet LED which emits light having a peak wavelength within the wavelength range of visible light; a light mixer which mixes light emitted from the tungsten lamp and the violet LED; an etalon which receives light mixed by the light mixer and transmits light contained in the received mixed light and having a particular wavelength; a light receiving unit which receives light transmitted by the etalon; and a measurement control unit which changes the wavelength of light that can pass through the etalon and measures spectral characteristics of the light having passed through the etalon based on the light received by the light receiving unit.
Claims8
A spectrometer comprising:
- a first light source which emits first light with no peak wavelength within a predetermined wavelength range of visible light and having a light amount increasing as a wavelength of the first light becomes longer within the predetermined wavelength range of visible light;
- a second light source which emits second light having a peak wavelength within the predetermined wavelength range;
- a light mixer that mixes the first light and the second light into mixed light, wherein the mixed light is directed toward an object;
- a wavelength variable interference filter which receives the mixed light incident on the object and transmits light having a wavelength varied by a driving voltage;
- a light detector which receives the light transmitted by the wavelength variable interference filter;
- and
- a computer configured to operate as a correction unit which corrects the driving voltage based on a relationship between the peak wavelength of the second light and the driving voltage when the wavelength variable interference filter transmits the light having the peak wavelength of the second light.
Dependencies are inferred from the claim text.