Micro aspherical lens and fabricating method therefor and optica

Details Micro aspherical lens and fabricating method therefor and optica Micro aspherical lens and fabricating method therefor and optica

1992-06-16

1994-09-06

Sugarman, Scott J.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359563, 359569, G02B 2744, G02B 1318

Patent

active

053453360

ABSTRACT:
An imaging device is formed by a transparent substrate having opposite surfaces on which are formed a plurality of micro aspherical lenses. The axes of the lenses on one surface coincide with the axes of respective lenses on the other surface. A two-dimensional micro lens array constructed by arranging converging lenses having a diameter of approximately several to several hundred micrometers is arranged ahead of a light source, thereby forming a multi-beam spot caused by diffraction in a distant position. A three-dimensional shape can be recognized with high precision by shape recognition means utilizing this multi-beam spot.

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