Patent ID: 7365850
Filing Date: 2008-04-29
Classification: G01J,G01N

Abstract:
1. A two-dimensional spectroradiometer comprising: an optical system which receives light from an object to be measured to form an optical image; a transmittance wavelength variable filter having a spectral transmittance characteristic that a transmittance wavelength of the light differs depending on a transmittance site of the transmittance wavelength variable filter where the light is passed; a scanner which movably holds the transmittance wavelength variable filter on an optical path forming the optical image for sequential scanning at a. plurality of scanning positions; and a two-dimensional image sensor which captures the optical image composed of the light passing through the transmittance wavelength variable filter at each of the scanning positions of the filter to acquire a plurality of images having a different spectral sensitivity among pixels of the image at the each of the scanning positions, wherein each image of the plurality of images is composed of a two-dimensional image, the each image of the plurality of images represents at least two lights having different wavelengths from one another depending on a pixel of the two-dimensional image sensor, and the wavelengths of the lights received by a certain pixel are different from one another depending on the each image.