Patent ID: 6147749
Filing Date: 2000-11-14
Classification: A61B,G01N

Abstract:
A measuring apparatus that has a projection optical system, projects measuring light onto a measured object, and detects a spectral intensity of the light transmitted or reflected by the measured object to measure a concentration of a particular component within the measured object based on the spectral intensity; said measuring apparatus comprising:measured-object mounting means for mounting the measured object,image pickup means for taking a picture of the measured object,image display means for displaying an image of the measured object,image registration means, during registration of a measuring location, for storing as a registered image an image in which a part having a visually recognized feature is marked by selecting the part from a pattern of the image of the measured object displayed on said image display means, andmoving means, during the restoration of the measuring location, for comparing the pattern of said registered image with a pattern of a currently taken image of the measured object to move said projection optical system so that the measuring light is projected onto a location of a part corresponding to the marked part of the registered image, in the currently taken image of the measured object; wherein the measurement is always performed by projecting the measuring light onto an identical part of the measured object;wherein said projection optical system moves in directions of an X axis and a Y axis that are orthogonal to a Z axis that is oriented in a direction of an optical axis of the measuring light.