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Image collector and fingerprint collection device

An image collector and image sensor technology, which is applied in printing image collection, image communication, fingerprint/palmprint acquisition/organization, etc., can solve the problems of large image collector thickness and high production cost, and achieve simple production, low cost, The effect of simple production process

Inactive Publication Date: 2017-12-05
渭南印象认知技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of large thickness and high production cost of existing image collectors using field diaphragms, the present invention provides a new image collector; in addition, the present invention also provides a fingerprint scanner using the aforementioned image collector. Acquisition equipment

Method used

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  • Image collector and fingerprint collection device
  • Image collector and fingerprint collection device

Examples

Experimental program
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no. 1 example

[0022] figure 2 It is a schematic structural diagram of an image collector shown in the first embodiment. Such as figure 2 As shown, the image collector includes a transparent cover 11, an image sensor 12 arranged below the transparent cover 11, and a light blocking layer 13 arranged above the transparent cover 11; the image sensor 12 is provided with several photosensitive pixels 15 , the light-blocking layer 13 is provided with several small light-transmitting holes 14 .

[0023] The light blocking layer 13 is made of opaque material. Preferably, the light-blocking layer 13 is a light-blocking film; in actual processing, the light-blocking layer 13 can be coated on the transparent cover plate 11 by vapor deposition or electroplating, and the light-transmitting small holes on the light-blocking layer 13 14 is formed by etching process. In practical application, the thickness of the light blocking layer 13 is less than 100um.

[0024] In the present embodiment, the imag...

no. 2 example

[0033] Figure 4 is a schematic structural diagram of the image collector shown in the second embodiment. Such as Figure 4As shown, the image collector provided in this embodiment includes an image sensor 21, a first transparent medium layer 23, a light blocking layer 22, a second transparent medium layer 24, a third transparent medium layer 25 and a fourth transparent medium layer from bottom to top. Layer 26, wherein the thickness of the first transparent medium layer 23 is h 1 .

[0034] The light-blocking layer 22 is made of opaque material, and several light-transmitting small holes 27 are arranged on its surface. In actual processing, the light-blocking layer 22 can be made by vapor deposition or electroplating, and the light-transmitting holes 27 on the light-blocking layer 22 can be made by etching.

[0035] According to the law of refraction of light, a ray of refraction index n A The medium A propagates to the refractive index n B Refraction occurs when the me...

no. 3 example

[0050] Figure 5 is a schematic structural diagram of the image collector shown in the third embodiment. Such as Figure 5 As shown, this embodiment and Figure 4 The structures and functions of the corresponding embodiments are basically the same, except that the second transparent medium layer 24 and the third transparent medium layer 25 are located below the light blocking layer 22 in this embodiment. Such as Figure 5 As shown, the image-side field of view formed by the small light-transmitting hole 27 on the image sensor 21 is also limited.

[0051] Of course, in other embodiments, the number and thickness of the transparent medium layers can be adjusted as required. For example, the first transparent medium layer 23 can be canceled; perhaps, the second transparent medium layer 24 can be canceled; or, the first transparent medium layer 23 and the second transparent medium layer 24 can be canceled at the same time; perhaps, the fourth transparent medium layer 26 can be...

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Abstract

The invention provides an image collector and a fingerprint collection device. The fingerprint collection device comprises a transparent cover plate, an image sensor disposed below the transparent cover plate, and a light-blocking layer disposed on the upper surface of the transparent cover plate; a plurality of light transmitting holes are formed in the light blocking layer; the image-side field of view lambda of the light transmitting holes is equal to arcsin (n1 / n2), wherein n2 is larger than n1; and a distance d between the centers of the adjacent light transmitting holes is greater than or equal to the diameter Dimage of the image-side field of view of the light transmitting holes. According to the image collector of the invention, the size of the image-side field of view of the light transmitting holes is limited through transparent media with different refractive indexes; since the thickness of the light blocking layer for carrying the light transmitting holes is far more smaller than the thickness of the field of view diaphragm of light sensing picture elements, so that the thickness of the image collector provided by the invention can be greatly decreased; since an etching processing for obtaining the light transmitting holes in the light-blocking layer is simple than the manufacturing process of a field of view diaphragm, the image collector provided by the invention is simple in manufacture and low in cost.

Description

[0001] This application claims priority to a Chinese patent application filed with the State Intellectual Property Office of China on May 25, 2016, with application number 201610353122.8, and the title of the invention is "Image Acquisition Device and Fingerprint Acquisition Device", the entire contents of which are incorporated herein by reference Applying. technical field [0002] The invention relates to the technical field of image acquisition, in particular to an image acquisition device and a fingerprint acquisition device using the image acquisition device. Background technique [0003] In the patents previously applied by the applicant, in order to prevent the image-side field of view of the photosensitive pixels in the image collector from aliasing, it is necessary to limit the field of view angle of each photosensitive pixel. figure 1 It is a structural schematic diagram of the display screen with fingerprint collection function in the earlier application documents...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06V10/147
CPCG06V40/1318G06V10/147H04N23/55
Inventor 张明方王远靖
Owner 渭南印象认知技术有限公司
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