Illumination – Photographic lighting – Including specific light modifier
Patent
1985-11-15
1987-11-10
Feinberg, Craig R.
Illumination
Photographic lighting
Including specific light modifier
362 32, 362302, G03B 1502
Patent
active
047061685
ABSTRACT:
An illumination system, particularly suitable for use with automatic vision systems employing an image sensing device or system, illuminates an object under analysis with the cone of light that may cover 360.degree. or only an arc segment about a part of the object under analysis. Light from a ring source is directed toward a curved parabolic surface on a light collector ring that substantially collimates the light and fans it out radially out toward a toroidal reflector surface on an encompassing ring, the relative position of which determines the angle of incidence of a cone of light formed to fall in the region of the object, so as to illuminate particular features with optimal efficiency. To change the angle of incidence while maintaining focus, a differential drive mechanism moves the parabolic collector ring and the toroidal angle generator ring in differential fashion concurrently.
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patent: 4494868 (1985-01-01), Lambeth
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patent: 4530036 (1985-07-01), Conti
patent: 4611917 (1986-09-01), Robieux et al.
patent: 4617619 (1986-10-01), Gehly
Feinberg Craig R.
Okonsky David A.
View Engineering, Inc.
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