IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0973898
(2004-10-27)
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등록번호 |
US-7586591
(2009-09-22)
|
발명자
/ 주소 |
- McClurg, George W.
- Fedele, Dean J.
|
출원인 / 주소 |
- Cross Match Technologies, Inc.
|
대리인 / 주소 |
Sterne, Kessler, Goldstein & Fox P.L.L.C.
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인용정보 |
피인용 횟수 :
1 인용 특허 :
171 |
초록
▼
Light wedges that reflect light internally and produce diffuse light for uniformly illuminating a platen in a print scanner are presented. In one example, a light wedge has a first surface that receives light emitted from an illumination source and a second surface that limits specular reflections.
Light wedges that reflect light internally and produce diffuse light for uniformly illuminating a platen in a print scanner are presented. In one example, a light wedge has a first surface that receives light emitted from an illumination source and a second surface that limits specular reflections. The light wedge transmits light from the illumination source toward the platen, whereby uniform illumination is provided to the platen. In another example, a light wedge has an illumination surface that receives light emitted from the illumination source, a first surface that limits specular reflections, and a second surface that acts as a diffuser. The second surface reflects light out of the light wedge toward the platen, whereby uniform illumination is provided to the platen.
대표청구항
▼
What is claimed is: 1. A light wedge used in an illumination system that provides uniform illumination for a platen in a print scanner, the light wedge comprising: an illumination surface that receives light emitted from an illumination source array; a first painted surface that limits specular ref
What is claimed is: 1. A light wedge used in an illumination system that provides uniform illumination for a platen in a print scanner, the light wedge comprising: an illumination surface that receives light emitted from an illumination source array; a first painted surface that limits specular reflections; and a second painted surface that acts as a diffuser, wherein the second painted surface reflects light out of the light wedge toward the platen, and whereby uniform illumination is provided to the platen. 2. The light wedge of claim 1, wherein the first painted surface is ground prior to being painted. 3. The light wedge of claim 1, wherein the second painted surface is ground prior to being painted. 4. The light wedge of claim 1, wherein the first painted surface is painted with a color similar to the color light emitted by the illumination source array. 5. The light wedge of claim 1, wherein the second painted surface is painted with a color similar to the color light emitted by the illumination source array. 6. The light wedge of claim 1, wherein the first painted surface is painted with a green paint. 7. The light wedge of claim 1, wherein the second painted surface is painted with a green paint. 8. The light wedge of claim 1, wherein the first painted surface and the second painted surface are painted with a paint having a color other than white. 9. The light wedge of claim 1, wherein the first painted surface and the second painted surface are painted with a green paint. 10. The light wedge of claim 1, wherein the light wedge is a Type-1light wedge. 11. The light wedge of claim 10, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is less than 180 degrees. 12. The light wedge of claim 1, wherein the light wedge is a Type-2light wedge. 13. The light wedge of claim 12, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is more than 180 degrees. 14. The light wedge of claim 1, wherein the light wedge is a Type-3light wedge. 15. The light wedge of claim 14, wherein the first painted surface is parallel, coplanar, and shares an edge with the second painted surface. 16. The light wedge of claim 14, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is equal to 180 degrees. 17. The light wedge of claim 1, wherein the light wedge is a Type-4light wedge. 18. The light wedge of claim 17, wherein the second painted surface is non-flat. 19. The light wedge of claim 18, wherein the second painted surface is concave. 20. A print scanner having an illumination source and a platen, the print scanner comprising: a light wedge having an illumination surface that receives light emitted from the illumination source, a first painted surface that limits specular reflections, and a second painted surface that acts as a diffuser, wherein the second painted surface reflects light out of the light wedge toward the platen, and whereby uniform illumination is provided to the platen. 21. The print scanner of claim 20, wherein the first painted surface is ground prior to being painted. 22. The print scanner of claim 20, wherein the second painted surface is ground prior to being painted. 23. The print scanner of claim 20, wherein the first painted surface is painted with a color similar to the color light emitted by the illumination source. 24. The print scanner of claim 20, wherein the second painted surface is painted with a color similar to the color light emitted by the illumination source. 25. The print scanner of claim 20, wherein the first painted surface is painted with a green paint. 26. The print scanner of claim 20, wherein the second painted surface is painted with a green paint. 27. The print scanner of claim 20, wherein the first painted surface and the second painted surface are painted with a paint having a color other than white. 28. The print scanner of claim 20, wherein the first painted surface and the second painted surface are painted with a green paint. 29. The print scanner of claim 20, wherein the light wedge is a Type-1light wedge. 30. The print scanner of claim 29, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is less than 180 degrees. 31. The print scanner of claim 20, wherein the light wedge is a Type-2light wedge. 32. The print scanner of claim 31, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is more than 180 degrees. 33. The print scanner of claim 20, wherein the light wedge is a Type-3light wedge. 34. The print scanner of claim 33, wherein the first painted surface is parallel, coplanar, and shares an edge with the second painted surface. 35. The print scanner of claim 33, wherein the first painted surface shares an edge with the second painted surface, and the angle between the first painted surface and the second painted surface is equal to 180 degrees. 36. The print scanner of claim 20, wherein the light wedge is a Type-4light wedge. 37. The print scanner of claim 36, wherein the second painted surface is non-flat. 38. The print scanner of claim 37, wherein the second painted surface is concave.
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