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:
Aug. 27, 2002
Filed:
Feb. 08, 2000
Po-Sung Kao, Taichung Hsien, TW;
Asia Optical Co., Ltd., Taichung Export Processing Zone, TW;
Abstract
Measuring method and device providing a traveling path of light beam. The traveling path includes a front portion between a target and a prism unit, a refraction portion entering the prism unit and extending inside the prism unit and a first and a second rear portions positioned outside the prism unit and corresponding to the front portion. A visible light beam and an invisible light beam at the same time travel along the front portion. The visible light beam comes from the surface of the target while the invisible light beam is a laser beam coming from a laser transmitter. The laser beam travels along the same path as the visible light beam to reach the surface of the target. Therefore, very long parts of the traveling paths of the visible light beam and the invisible light beam coincide with each other and are commonly directed to a specific portion of the target. Accordingly, a better measurement precision can be achieved and the volume of the device can be reduced