Patent ID: 6930297
Filing Date: 2005-08-16
Classification: G01C,G01S

Abstract:
1. An image sensing device comprising: a first optical system for forming a first object image; a first area sensor arranged in the approximate image forming plane of the first optical system for receiving the light of the first object image, wherein sensing elements of the first area sensor are arranged contiguously in two dimensions; a second optical system for forming a second object image; a second area sensor arranged in the approximate image forming plane of the second optical system for receiving the light of the second object image, wherein sensing elements of the second area sensor are arranged contiguously in two dimensions; a signal reader for reading a first photoreception signal group from said first area sensor, a second photoreception signal group from said second area sensor and a third photoreception signal group from said second area sensor, wherein the first photoreception signal group constitutes a set of two-dimensional image data from the first object image, the second photoreception signal group constitutes a first set of two-dimensional image data from the second object image, and the third photoreception signal group constitutes a second set of two-dimensional image data from the second object image; a position detector for detecting a first image interval by comparing the two-dimensional image data of the second photoreception signal group with the two-dimensional image data of the first photoreception signal group, and for detecting a second image interval by comparing the two-dimensional image data of the third photoreception signal group with the two-dimensional image data of the first photoreception signal group; and an angle detector for detecting a magnitude of an angle of the second object image relative to an axis of the second area sensor based on the detected image intervals.