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Surface illuminator with means for adjusting orientation and inclination of incident illumination

  • US 5,690,417 A
  • Filed: 05/13/1996
  • Issued: 11/25/1997
  • Est. Priority Date: 05/13/1996
  • Status: Expired due to Term
First Claim
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1. A surface illuminator, comprisinga first housing having therein an axial bore containing means for projecting through said bore the image of an object located in a predetermined position beyond one end of said first housing,a second housing surrounding said first housing and having an open end disposed coaxially of and adjacent to said one end of said first housinga plurality of collimated light sources each having a light emitting end,said light sources being mounted in said second housing in spaced relation to each other, and with said light emitting ends thereof disposed in radially spaced circular arrays surrounding said first housing coaxially of said bore, and lying in a common plane extending normal to the axis of said bore, each of said sources being operative, when energized, to direct a beam of light substantially parallel to said axis and toward the open end of said second housing,a Fresnel lens mounted in said open end of said second housing in confronting relation to the light emitting ends of said light sources whereby the light beams from said sources pass through said Fresnel lens and are thereby redirected toward and focused onto said object in said predetermined position, andcontrol means for selectively energizing said light sources, thereby to control the amount and orientation of the illumination directed by said Fresnal lens onto said object.

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