Digital camera optical system with field lens
First Claim
Patent Images
1. An optical system for imaging light in a digital camera, comprising:
- an electronic sensor having an area array of pixels for detecting said image light;
a lens for focusing said image light onto said electronic sensor, wherein said lens comprises a near-telecentric lens; and
one or more field lenses positioned adjacent said electronic sensor so as to be substantially in the path of said image light for directing said image light onto said area array of pixels.
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Abstract
An optical system for detecting image light in a digital camera includes an electronic sensor having an area array of pixels for detecting the image light. A field lens is positioned adjacent the electronic sensor so as to be substantially in the path of the image light for directing the image light onto the area array of pixels. The field lens straightens the image light so that the straightened image light rays are substantially parallel to an optical axis of the digital camera.
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Citations
17 Claims
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1. An optical system for imaging light in a digital camera, comprising:
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an electronic sensor having an area array of pixels for detecting said image light;
a lens for focusing said image light onto said electronic sensor, wherein said lens comprises a near-telecentric lens; and
one or more field lenses positioned adjacent said electronic sensor so as to be substantially in the path of said image light for directing said image light onto said area array of pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for reducing the angle of incidence of image light rays falling upon an electronic sensor in a digital camera, comprising:
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providing a near-telecentric lens to focus said image light rays; and
mounting a field lens between said near-telecentric lens and said electronic sensor so as to be substantially in the path of said image light rays. - View Dependent Claims (12)
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13. An optical apparatus in a digital camera, the apparatus consisting of:
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a two-dimensional array of light detecting pixels mounted in said digital camera substantially in a light path of said optical apparatus and substantially perpendicular to an optical axis of said digital camera; and
a field lens having a substantially flat bottom surface and a convex upper surface and a positive focal length, said field lens being mounted in said digital camera in front of said two-dimensional array of light detecting pixels so that said substantially flat bottom surface is parallel to and mounted adjacent said two-dimensional array of light detecting pixels and the light path passes through said field lens before reaching said two-dimensional array of light detecting pixels. - View Dependent Claims (14, 15, 16, 17)
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Specification