Method and System for Filtering an Optical Lens
First Claim
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1. A system, comprising:
- an imager providing an image of a target based on light from the target;
an optical lens having a light-filtering coating blocking ambient light, the optical lens focusing at least a portion of the light from the target onto the imager; and
a processing device decoding the image of the target.
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Abstract
Described are a method and system for filtering an optical lens. The system includes an imager providing an image of a target based on light from the target; an optical lens having a light-filtering coating blocking ambient light, the optical lens focusing at least a portion of the light from the target onto the imager; and a processing device decoding the image of the target.
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Citations
22 Claims
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1. A system, comprising:
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an imager providing an image of a target based on light from the target; an optical lens having a light-filtering coating blocking ambient light, the optical lens focusing at least a portion of the light from the target onto the imager; and a processing device decoding the image of the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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receiving light from a target; blocking, by a light-filtering coating on an optical lens, ambient light from entering an imager while allowing light having a wavelength within a predetermined range to enter the imager; creating an image of the target via the imager based on the light received by the imager; and decoding the image. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An optical lens, comprising:
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a body having a plurality of surface; and a light-filtering coating applied to a surface of the surface producing a smallest incident angle relative to a surface normal for a worst ray. - View Dependent Claims (20, 21)
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22. A system, comprising:
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imaging means for providing an image of a target based on light from the target; optical means having a light-filtering coating blocking ambient light, the optical means focusing at least a portion of the light from the target onto the imaging means; and processing means for decoding the image of the target.
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Specification