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. 17, 1994
Filed:
Jul. 13, 1992
James G Leatham, Cardiff by the Sea, CA (US);
Raymond H Bratton, Santee, CA (US);
Applied Remote Technology Inc., San Diego, CA (US);
Abstract
In a laser beam X-Y scanning system for use, as for example, in turbid media such as sea water; the laser light reflected from objects is received by an image receiving device or detector such as a photomultiplier tube (PMT). The intensity level of the reflected light is maintained at an intensity level within the dynamic range of the image receiving device by controlling the effective intensity of the laser beam by varying the density of a plurality of series positioned variable neutral density filters positioned between the laser beam generator and the object to be illuminated or the illuminated object and the image receiving device. The light density of each filter is determined by real time environmental conditions and the instantaneous position of the laser light source relative to the object from which the laser light is reflected to the image receiver. The density of each of the plurality of filters is controlled by a computer.