Patent ID: 8384011
Filing Date: 2013-02-26
Classification: G06F

Abstract:
1. An optical detection device comprising: a light emitting element; an irradiation optical system for applying a bundle of emission rays emitted from the light emitting element to an object to be measured; a reflected light optical system for condensing reflected light from the object to be measured; a light receiving element for detecting reflected light from the object to be measured condensed by the reflected light optical system; and a signal processing section for processing a light-reception signal from the light receiving element, wherein the light receiving element is a line sensor or area sensor for detecting an intensity distribution of reflected light from the object to be measured, and given a z-axis that is an optical axis of a bundle of emission rays emitted from the light emitting element, an x-axis that is a straight line perpendicular to the z-axis and extending along a line direction interconnecting the light emitting element and the light receiving element, a y-axis that is a straight line passing through an intersection point of the z-axis and the x-axis and perpendicular to the z-axis and the x-axis, and given an x-y coordinate plane that is a plane containing the x-axis and the y-axis, then the signal processing section detects at least one of an x-coordinate and a y-coordinate of the object to be measured on the x-y coordinate plane from at least one of a light-spot position on the light receiving element or a light-spot shape on the light receiving element based on the light-reception signal received from the light receiving element.