Optical encoder wheel with split lens ring

Details Optical encoder wheel with split lens ring Optical encoder wheel with split lens ring

1998-09-25

1999-11-09

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359642, 359738, 359809, G02B 2710, G02B 300

Patent

active

059825510

ABSTRACT:
Disclosed is a split-lens for grating wheel comprising a disk body and a ring-lens around the peripheral of the disk body wherein said ring-lens comprises alternately-arranged opaque parts and transparent parts, and transparent parts forms the convex lens portion for said ring-lens. The opaque parts are arranged in radial direction on peripheral of the disk body and with equi-angle. By this configuration, the inference problem can be solved and the resolution can be enhanced.

REFERENCES:
patent: 4757196 (1988-07-01), Yamada et al.
patent: 4899048 (1990-02-01), Shelander
patent: 5148020 (1992-09-01), Machida
patent: 5241172 (1993-08-01), Lugaresi

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