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:
Dec. 02, 1997
Filed:
Jan. 31, 1995
Yasuji Ogawa, Otone-machi, JP;
Kabushikikaisha Wacom, , JP;
Abstract
A range imaging device such as a distance camera is improved by incorporating an oscillator to generate a reference signal, a light source to emit a light modulated in accordance with the reference signal and to project the light onto a three-dimensional target. A condenser lens collects and condenses a secondary light reflected by the target and projects the secondary light onto a gating image intensifier, which selectively gates the secondary light in synchronism with a pair of out-of-phase gate signals generated in accordance with the reference signal. Range information contained in the secondary light is extracted by the gating process. A CCD camera receives the gated secondary light and produces a corresponding image signal which is processed to produce a range image of the target.