Optical imaging device
First Claim
Patent Images
1. An optical imaging device comprising:
- a source of light for illuminating an object to be imaged so that a light beam derived from said object and carrying its image is formed,image focusing means for dividing said derived light beam into a plurality of focused sub-beams carrying subimages of said object, and for focusing each of said sub-beams on a focal plane, anda plurality of charge coupled device array image sensors corresponding to said plurality of sub-beams, each image sensor disposed in a focal plane corresponding to one of said sub-beams, for receiving and converting a corresponding subimage into an electric signal and each charge coupled device array comprising an array of m x n charge coupled devices where m and n are both greater than 1.
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Abstract
An optical imaging device such as a fingerprint imager or a CCD camera, has a reduced size due to the provision of multiple lenses which are associated with respective CCDs. The optical path between the lenses and the CCDs is shortened. In a fingerprint version of the device, a staircase-shaped prism is advantageously used in combination with the multiple lens and multiple CCD arrangement. An alignment means is provided to facilitate the reconstructing the image out of partial images created by separate CCDs.
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Citations
19 Claims
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1. An optical imaging device comprising:
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a source of light for illuminating an object to be imaged so that a light beam derived from said object and carrying its image is formed, image focusing means for dividing said derived light beam into a plurality of focused sub-beams carrying subimages of said object, and for focusing each of said sub-beams on a focal plane, and a plurality of charge coupled device array image sensors corresponding to said plurality of sub-beams, each image sensor disposed in a focal plane corresponding to one of said sub-beams, for receiving and converting a corresponding subimage into an electric signal and each charge coupled device array comprising an array of m x n charge coupled devices where m and n are both greater than 1. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical imaging device comprising:
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a transparent prism having a first surface to which an object to be imaged is contacted, a source of light for illuminating said object so that a light beam derived from said object and carrying its image is formed, an image focusing means for dividing said derived light beam into a plurality of focused sub-beams carrying subimages of said object, and for focusing each of said subbeams on a focal plane, and a plurality of image sensors corresponding to said plurality of sub-beams, each image sensor disposed in a focal plane corresponding to one of said sub-beams. for receiving and converting a corresponding subimage into an electric signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. An optical imaging device comprising;
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an array of charge coupled device arrays having a predetermined spatial relation to each other for sensing at least some of an incident optical image, each charge coupled device array comprising a two-dimensional array of sense elements for sensing light incident upon the elements; and means for directing different portions of an image incident upon the means toward each of the charge coupled device arrays. - View Dependent Claims (18, 19)
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Specification