The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2010
Filed:
Nov. 30, 2007
Yi-yuh Hwang, Taoyuan, TW;
Ming Chen, Tao-Yuan, TW;
Shin-i MA, Tao-Yuan, TW;
Chin-der Hwang, Jhubei, TW;
Mau-ran Wang, Taipei, TW;
Wen-chen Huang, Taipei, TW;
Yi-Yuh Hwang, Taoyuan, TW;
Ming Chen, Tao-Yuan, TW;
Shin-I Ma, Tao-Yuan, TW;
Chin-Der Hwang, Jhubei, TW;
Mau-Ran Wang, Taipei, TW;
Wen-Chen Huang, Taipei, TW;
Chung Shan Institute of Science and Technology, Taoyuan County, TW;
Abstract
An image invariant optical speckle capturing device and method. A highly coherent light is used to illuminate a surface and is scattered by the surface, and is captured from the direction with a ±10° from the angle of specular reflection. A light restrictive module is designed to confine the angular field of view of the sensor, when the speckle capturing device has a relative motion with respect to the surface, the speckle only move on the image but the shape and the intensity are almost keep constant, that is favorable for high accuracy optical pattern recognition and positioning.