Optical element and device for providing uniform irradiance of a surface
First Claim
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1. An optical element adapted to be interposed between a light source and a target surface, comprising:
- a meniscus cylinder lens adapted to collimate light beams from the light source and direct the collimated light beams to a preselected area on the target surface; and
first and second reflective portions, each reflective portion attached to and extending parallel to the mensicus cylinder lens, each reflective portion adapted to totally internally reflect light beams from the light source and direct the light beams reflected therein to the preselected area on the target surface, whereby the reflected light beams from the reflective portions are not parallel to the collimated light beams from the menisicus cylinder lens.
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Accused Products
Abstract
An optical element uniformly distributes radiant energy on a target surface, such as for discharging an area of a photoreceptor in a xerographic printer, or for applying infrared energy to dry an ink-jet image. A cylinder lens collimates light beams from a light source and directs the collimated light beams to a preselected area on the target surface. First and second refractive portions, each attached to and extending parallel to the cylinder lens, totally internally reflect light beams from the light source and direct the light beams reflected therein to the target surface.
191 Citations
7 Claims
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1. An optical element adapted to be interposed between a light source and a target surface, comprising:
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a meniscus cylinder lens adapted to collimate light beams from the light source and direct the collimated light beams to a preselected area on the target surface; and first and second reflective portions, each reflective portion attached to and extending parallel to the mensicus cylinder lens, each reflective portion adapted to totally internally reflect light beams from the light source and direct the light beams reflected therein to the preselected area on the target surface, whereby the reflected light beams from the reflective portions are not parallel to the collimated light beams from the menisicus cylinder lens. - View Dependent Claims (2, 3)
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4. An apparatus for irradiating a target surface, comprising:
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a plurality of light-emitting elements acting as point light sources, arranged in a linear array; a meniscus cylinder lens adapted to collimate light beams from the light elements and direct the collimated light beams to a preselected area on the target surface; and first and second reflective portions, each reflective portion attached to and extending parallel to the meniscus cylinder lens, each reflective portion adapted to totally internally reflect light beams from the light sources and direct the light beams reflected therein to the preselected area on the target surface, whereby the reflected light beams from the reflective portions are not parallel to the collimated light beams from the menisicus cylinder lens. - View Dependent Claims (5, 6, 7)
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Specification