Image-taking optical system and image input apparatus
First Claim
1. An image-taking optical system for forming an image of a two-dimensional object on an image-taking surface, comprising:
- a plurality of reflecting surfaces which reflect light from said two-dimensional object sequentially and guide the light to said image-taking surface, wherein a reference axis passing through the center of the pupil of said image-taking optical system and the center of the image formed on said image-taking surface is inclined with respect to the normal line of said two-dimensional object.
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Abstract
An image-taking optical system according to the present invention for forming an image of a two-dimensional object on an image-taking surface comprises a plurality of reflecting surfaces which reflect light from the two-dimensional object sequentially and guides the light to the image-taking surface, and a reference axis passing through the center of the pupil of the image-taking system and the center of the optical image formed on the image-taking surface is inclined with respect to the normal line of the two-dimensional object.
The present invention provides an image-taking optical system which achieves a reduction in size, ensures a ratio of an amount of peripheral light, allows correction of trapezoidal distortion of a formed image, and is suitable for oblique image-taking.
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Citations
13 Claims
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1. An image-taking optical system for forming an image of a two-dimensional object on an image-taking surface, comprising:
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a plurality of reflecting surfaces which reflect light from said two-dimensional object sequentially and guide the light to said image-taking surface, wherein a reference axis passing through the center of the pupil of said image-taking optical system and the center of the image formed on said image-taking surface is inclined with respect to the normal line of said two-dimensional object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification