Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1995-04-05
1997-04-15
Gonzalez, Frank
Optics: measuring and testing
By polarized light examination
With light attenuation
250237G, G01B 1124
Patent
active
056215290
ABSTRACT:
An illuminating apparatus is for use with a visual sensory apparatus, for projecting a light pattern onto a surface to be viewed by the sensory apparatus. The illuminating apparatus comprises: a light source; a patterniser for constraining light emitted from the source to produce on the surface, a light pattern having a light interface, the interface having an extended dimension. The light pattern is caused to move relative to the surface, parallel to the extended dimension of the light interface. The pattern may comprise a plurality of extended straight line interfaces, each interface being parallel to the other interfaces of the plurality. Rather than straight, the plurality may be circular and concentric. Rather than a plurality, the pattern may comprise a single straight line or circular light interface. The motion of the light pattern relative to the surface minimizes any speckle pattern that might arise from optical interference, below the degree of speckle that would be presence if the pattern were not moving. The pattern may be made to move by moving the light source, or a mirror or prism interposed in the optical path from the light source to the surface.
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Benayad-Cherif Faycal E. K.
Gordon Steven J.
Gonzalez Frank
Intelligent Automation Systems, Inc.
Merlino Amanda
Weissburg Steven J.
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