Patent ID: 6324008
Filing Date: 2001-11-27
Classification: G01K,G05B,G08B,H05B,H05K,Y02B

Abstract:
A cubicle wall mount segmented lens array providing a wide field of view and a very short range detection optical pattern suitable for operation in a close-in environment as in a cubicle, and yet having the same focal distance as a wideview or hallway sensor, to create a universal lens design for a universal multifunction sensor comprising:a. a curved Fresnel lens array comprising a plurality of Fresnel lens segments positioned along the length of the lens array, and atypically positioned out-of-focus with respect to an infrared detector element, each of which segments provides a field of view slightly below the horizon; andb. a plurality of lensless infrared window segments positioned near the bottom of the lens array, providing a short range detection optical pattern and field of view inclined substantially downwardly with respect to the field of view of the Fresnel lens array and the horizon.