CN201489552U - Flat fingerprint acquisition unit - Google Patents

Flat fingerprint acquisition unit Download PDF

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Publication number
CN201489552U
CN201489552U CN2009201198372U CN200920119837U CN201489552U CN 201489552 U CN201489552 U CN 201489552U CN 2009201198372 U CN2009201198372 U CN 2009201198372U CN 200920119837 U CN200920119837 U CN 200920119837U CN 201489552 U CN201489552 U CN 201489552U
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CN
China
Prior art keywords
prism
lens
acquisition unit
flat
fingerprint capturer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009201198372U
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Chinese (zh)
Inventor
艾永明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dessmann China Machinery and Electronic Co Ltd
Original Assignee
艾永明
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Publication date
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Priority to CN2009201198372U priority Critical patent/CN201489552U/en
Application granted granted Critical
Publication of CN201489552U publication Critical patent/CN201489552U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a flat fingerprint acquisition unit, and belongs to the technical field of fingerprint image acquisition and identification. The flat fingerprint acquisition unit comprises a shell of the acquisition unit, and a prism of which the longitudinal section is a right trapezoid, a lens and an image sensor which are arranged in the shell of the acquisition unit; the lens and the image sensor are positioned on one side of the straight lateral of the prism; and the inclined lateral of the prism is provided with a reflecting mirror face; and the flat fingerprint acquisition unit is characterized in that: the upper bottom surface of the prism serves as a fingerprint acquisition face; the straight lateral of the prism is close to a black cavity; and the other side of the black cavity is provided with the lens and the image sensor. The prism manufacturing process is simplified; the length of the prism is reduced; and the overall size of the fingerprint acquisition unit is reduced, so that the acquisition unit is miniaturized and the mechanical strength thereof is strengthened. The focus of the lens can be adjusted externally, and the convenience is improved.

Description

A kind of flat fingerprint capturer
Technical field
The utility model belongs to fingerprint image and catches the recognition technology field, is specifically related to the high-resolution fingerprint capturer.
Background technology
Present flat optical fingerprint collector all belongs to the light path system of dark background, and the fingerprint collecting area is little, and sharpness is low.Big for obtaining to gather area, promote clearness, Chinese invention patent CN101034437A absorbs light by be coated with black flour on prism, to obtain the image of enough contrasts.
As shown in Figure 1, flat fingerprint capturer absorbs light by being coated with black flour 9, to obtain the image of enough contrasts with the one side blacking of prism in the prior art.Prism is coated with black flour and absorbs light for producing one section, so must reach certain length.Cause the fingerprint capturer longer dimension, the fingerprint capturer heaviness, production cost increases.
Prism is generally glass material, carry out to obtain after blacking is handled the image of certain contrast in the above, but, thereby become the big bottleneck that fingerprint collecting phase device designs because the characteristic of material itself but can't further improve contrast under existing technical merit.
Summary of the invention
In order to overcome deficiency of the prior art, the purpose of this utility model is to provide a kind of lightweight, sharpness is good, physical strength is stronger, produce assembling simple flat formula fingerprint capturer.
For achieving the above object, the utility model adopts following technical scheme:
A kind of flat fingerprint capturer, comprising the collector housing and placing its interior longitudinal section is prism, lens and the imageing sensor of right-angled trapezium, lens and imageing sensor are positioned at prism straight middle surface one side, oblique girdle plane is shaped on mirror surface, the upper bottom surface that it is characterized in that prism is as the fingerprint collecting face, prism straight middle surface neighbour one black cavity, the opposite side of black cavity is lens and imageing sensor.
Further, the degree of depth L of black cavity is greater than 1/2 of prism height.
Preferred version is that lens place the sleeve of length travel relatively, and lens are embedded in the lens sleeve.So the focal length of design lens is adjustable from the outside, has improved convenience.
For ease of processing, the black cavity is the part of collector housing, scribbles a section of mute light black for the inwall of collector housing.
Several pits or projection are laid in the inboard of described black cavity.
The inboard of described black cavity is a corrugated surface, perhaps for being usually used in strengthening shape or the structure that light absorbs in the prior art.
Flat fingerprint capturer compared to existing technology, its beneficial effect is:
(1) prism is save and is coated with black flour technology, makes its manufacturing more simple;
(2) reduce the length dimension of prism, in experiment, reach same effect.The black cavity can shorten 2/3 of former pitch-dark layer length, reduces the fingerprint capturer overall dimensions compared to existing technology, and has changed light path simultaneously, makes the collector microminiaturization, and the microminiaturization of collector can strengthen its physical strength.
(3) absorb light by the black cavity, can obtain the image higher, help improving image quality, guarantee the sharpness and the integrality of imaging than traditional fingerprint capturer contrast.
(4) focal length of lens lens is adjustable from the outside, has improved convenience.
Description of drawings
Fig. 1 is the flat fingerprint capturer structural representation of prior art.
Fig. 2 is the flat fingerprint capturer structural representation of the utility model.
Embodiment
Come the utility model is further specified below in conjunction with specific embodiment, but the utility model is not limited to these embodiments.One skilled in the art would recognize that the utility model contained in claims scope all alternativess, improvement project and the equivalents that may comprise.
Embodiment 1
Fig. 1 is the flat fingerprint capturer of prior art, form by prism 8, lens 5 and photoelectric detector or imageing sensor 7, the bottom surface of prism 8 is pitch-dark 9, oblique girdle plane 1 is a reflective mirror, its light path is, finger covers on the prism, and to pitch-dark layer, pitch-dark layer is sent to imageing sensor 7 by the reflex to oblique girdle plane 1 and scioptics 5 and reflecting surface 6 of prism to the light of its cover part again by prismatic reflection.
A kind of as shown in Figure 2 flat fingerprint capturer is made of prism 8, lens 5, cmos imageing sensor 7, reflecting surface 6 and black cavity L, and all is installed in the plastic box body,
The longitudinal section of prism 8 is that right-angled trapezium, lens and imageing sensor are positioned at prism straight middle surface one side, oblique girdle plane 1 is shaped on mirror surface, the upper bottom surface of prism is as fingerprint collecting face 2, prism straight middle surface neighbour one black cavity, the degree of depth L of black cavity is configured between the straight middle surface and lens 5 of prism greater than 1/2 of prism height.The opposite side that is the black cavity is lens 5 and imageing sensor.But lens 5 place the sleeve 4 of an opposite shell displacement, and lens are embedded in the lens sleeve 4, and the top of lens sleeve is exposed at outside the plastic box body.
In actual application, the people is placed on finger on the prism and carries out image acquisition constantly, and finger covers on the prism, and the light of its cover part reflects by prism, and scioptics and reflecting surface are sent to cmos sensor successively.The light that other fingers do not cover part is absorbed by the black cavity after by prismatic reflection.
In actual applications, the black cavity is a part that belongs to fingerprint head capsule body structure, and inwall is mute light black, and the big more light assimilation effect of cavity depth L is good more, but that overall volume also can become is big.Adopt the cavity of out-of-shape (as corrugated surface) and the degree of depth just can get and effectively absorb light, obtain than the conventional fingerprint collector picture contrast of plus sige more, thereby obtain better fingerprint image greater than 1/2H (H is a prism height).
Lens have been installed the lens sleeve that can move from the fingerprint capturer outside in the present embodiment, can carry out the adjustment of focal length easily after whole fingerprint installation, thereby have increased the convenience of production run.

Claims (6)

1. flat fingerprint capturer, comprising the collector housing and placing its interior longitudinal section is prism (8), lens (5) and the imageing sensor (7) of right-angled trapezium, lens and imageing sensor are positioned at prism straight middle surface one side, oblique girdle plane is shaped on mirror surface (1), the upper bottom surface that it is characterized in that prism is as fingerprint collecting face (2), prism straight middle surface neighbour one black cavity, the opposite side of black cavity are lens (5) and imageing sensor.
2. flat fingerprint capturer as claimed in claim 1 is characterized in that the degree of depth L of black cavity is greater than 1/2 of prism height.
3. flat fingerprint capturer as claimed in claim 2 is characterized in that lens (5) place a movable sleeve (4), and lens are embedded in the lens sleeve (4).
4. flat fingerprint capturer as claimed in claim 2 is characterized in that the black cavity is a section that the inwall of collector housing scribbles mute light black.
5. flat fingerprint capturer as claimed in claim 2 is characterized in that several pits or projection are laid in the inboard of black cavity.
6. flat fingerprint capturer as claimed in claim 5, the inboard that it is characterized in that the black cavity is a corrugated surface.
CN2009201198372U 2009-05-14 2009-05-14 Flat fingerprint acquisition unit Expired - Lifetime CN201489552U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201198372U CN201489552U (en) 2009-05-14 2009-05-14 Flat fingerprint acquisition unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201198372U CN201489552U (en) 2009-05-14 2009-05-14 Flat fingerprint acquisition unit

Publications (1)

Publication Number Publication Date
CN201489552U true CN201489552U (en) 2010-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201198372U Expired - Lifetime CN201489552U (en) 2009-05-14 2009-05-14 Flat fingerprint acquisition unit

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104732631A (en) * 2015-03-12 2015-06-24 长沙市吉盾安防科技有限公司 Intelligent fingerprint password anti-theft lock system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104732631A (en) * 2015-03-12 2015-06-24 长沙市吉盾安防科技有限公司 Intelligent fingerprint password anti-theft lock system

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: DESSMANN electric (China) Co., Ltd.

Assignor: Ai Yongming

Contract record no.: 2010330002287

Denomination of utility model: Flat fingerprint acquisition unit

Granted publication date: 20100526

License type: Exclusive License

Record date: 20101228

PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Flat fingerprint acquisition unit

Effective date of registration: 20110907

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2011990000344

PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20120413

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2011990000344

PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Flat fingerprint acquisition unit

Effective date of registration: 20120413

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2012990000148

PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20130619

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2012990000148

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Flat fingerprint acquisition unit

Effective date of registration: 20130702

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2013990000422

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20170123

Address after: Hangzhou City, Zhejiang province 310000 Binjiang District Jiang Hui Road No. 7 Building 1 layer 1-3

Patentee after: DESSMANN electric (China) Co., Ltd.

Address before: Hangzhou City, Zhejiang province 310007 Stadium Road Hongdu business building room A-202

Patentee before: Ai Yongming

TR01 Transfer of patent right

Effective date of registration: 20170704

Address after: Hangzhou City, Zhejiang province 310000 Binjiang District Jiang Hui Road No. 7 Building 1 layer 1-3

Patentee after: DESSMANN electric (China) Co., Ltd.

Address before: Hangzhou City, Zhejiang province 310007 Stadium Road Hongdu business building room A-202

Patentee before: Ai Yongming

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Granted publication date: 20100526

CX01 Expiry of patent term
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20200108

Granted publication date: 20100526

Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou branch

Pledgor: Ai Yongming

Registration number: 2013990000422

PC01 Cancellation of the registration of the contract for pledge of patent right