KR200482563Y1 - Iris identifying device having optical filter optimized on taking iris image - Google Patents

Iris identifying device having optical filter optimized on taking iris image Download PDF

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Publication number
KR200482563Y1
KR200482563Y1 KR2020150004192U KR20150004192U KR200482563Y1 KR 200482563 Y1 KR200482563 Y1 KR 200482563Y1 KR 2020150004192 U KR2020150004192 U KR 2020150004192U KR 20150004192 U KR20150004192 U KR 20150004192U KR 200482563 Y1 KR200482563 Y1 KR 200482563Y1
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South Korea
Prior art keywords
lens
filter
iris
size
optical filter
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KR2020150004192U
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Korean (ko)
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KR20170000023U (en
Inventor
김성현
이한혁
황대우
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주식회사 이리언스
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    • G06K9/00604—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus
    • H04N5/2251—

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Studio Devices (AREA)
  • Image Input (AREA)

Abstract

An iris recognition apparatus having an optical filter optimized for iris photography according to the present invention includes: an optical filter that transmits infrared rays incident from a user side; A lens for refracting infrared rays transmitted through the optical filter to form a focus; An image pickup element for picking up an image of the user's iris by detecting the infrared ray passing through the lens and forming a focus; And a processing module for performing iris recognition to compare the generated iris image with a previously stored registered image to determine whether the two are identical or not, wherein the optical filter reflects or absorbs visible light incident from the user side, A first filter having a first opening having a shape and size corresponding to the shape and size of the lens and being arranged so that light having passed through the first opening is incident on the lens; And a second filter (i.e., a cold mirror) fixed to the opening and transmitting the infrared rays incident from the user side and reflecting the visible ray.

Description

TECHNICAL FIELD [0001] The present invention relates to an IRIS IDENTIFYING DEVICE HAVING OPTICAL FILTER OPTIMIZED ON TAKING IRIS IMAGE,

The present invention relates to an iris recognition apparatus having an optical filter optimized for iris imaging, and more particularly, to an iris recognition apparatus capable of displaying the position of a camera for photographing an iris and optimally collecting light incident from a user To an iris recognition device.

A system for security, security, and identity authentication has been popularized to recognize a user's iris, authenticate his identity, and allow or deny access to specific places or access to specific information.

The iris recognition system is a system that authenticates an individual by comparing the characteristic pattern of the iris in the iris image captured by the video camera with the iris data registered in advance, after data is formed using the image processing technique.

As an example of the conventional technique for the iris recognition system, refer to Japanese Patent Laid-Open Publication No. 2003-0070184 (eye position display device of iris recognition system). In the conventional iris recognition system, as shown in FIG. 6, a PCB 201 for controlling light emission; A chip LED 202 mounted on the PCB 201 to emit light; A diffusion sheet 203 for uniformly distributing light emitted from the chip LED 202; A hole mask 204 for allowing light uniformly distributed in the diffusion sheet 203 to pass through only a predetermined region; A barrel 205 for maintaining a predetermined distance so that light passing through the hole mask 204 is focused; A lens 206 converging the light having the focal length maintained at the lens barrel 205 so as to focus; An indicator slit (207) for passing the converged light through the slit of the slit; And a cold mirror 208 for showing the light passing through the instruction slit 207.

On the other hand, in the above-described conventional technique, a cold mirror of a size and shape capable of covering the front part of the barrel is applied. However, in reality, the light reaching the CCD through the lens will be the light transmitted through a central portion of the cold mirror, and if so, the portion other than the central portion will be an unnecessary portion.

A cold mirror is a mirror for selectively reflecting a visible ray, and is made by depositing a plurality of materials on a glass. Therefore, it is an expensive component depending on its size and shape. Furthermore, in the case of using a glass material in order to improve the light transmittance, defects such as breakage of corner portions may occur frequently during processing into a desired shape.

Therefore, in order to reduce the overall price of the iris recognition system, it is necessary to provide the cold mirror at a low cost by constructing the cold mirror in a simple form with a minimum size and easy processing (that is, a low defect rate).

The present invention aims at lowering the overall price of the iris recognition apparatus by providing a cold mirror at a low price in accordance with the above-mentioned demand.

To do this, we want to minimize the size of the cold mirror and simplify the shape.

It is also intended to minimize the optical disadvantage caused by the cold mirror.

According to an aspect of the present invention, there is provided an iris recognition apparatus including an optical filter optimized for iris imaging, including: an optical filter that transmits infrared rays incident from a user side; A lens for refracting infrared rays transmitted through the optical filter to form a focus; An image pickup element for picking up an image of the user's iris by detecting the infrared ray passing through the lens and forming a focus; And a processing module for performing iris recognition to compare the generated iris image with a previously registered image to determine whether the two are identical or not, wherein the optical filter reflects visible light incident from the user side, transmits infrared light A first filter having a first opening having a shape and size corresponding to the shape and size of the lens and arranged so that light having passed through the first opening is incident on the lens; And a second filter (that is, a cold mirror) that transmits infrared rays incident from the user side and reflects a visible ray.

Here, in the first aperture of the first filter, the size of the lens side is set to be equal to or smaller than the size of the lens, the size of the user side is set larger than the size of the lens side, And may be formed to correspond to the shape and size of the user-side first opening.

The cross section of the first opening of the first filter may be configured such that the user side and the lens side have a step at a right angle and the second filter may be formed without a step and attached to the horizontal portion of the step.

The shape of the lens-side first opening may be a prism shape that is equal to or smaller than the size of the lens.

The first filter is made of synthetic resin, and the second filter is a cold mirror.

Further, the iris recognition apparatus may further include a light emitting element for displaying the operation state of the iris recognition device to the user through a second aperture formed in the first filter at the lens side of the first filter .

In the iris recognition apparatus having the optical filter according to the present invention having the above-described configuration, since the second filter (i.e., the cold mirror) having a small size corresponding to the size of the lens and having a circular simple shape is used, The overall price of the recognition device can be reduced.

In addition, since the size and shape of the second filter correspond to the size and shape of the lens, it is possible to prevent an optically unfavorable phenomenon in which light is irregularly incident by the peripheral portion of the second filter, .

1 is a view for explaining a schematic structure of an iris recognition apparatus having an optical filter optimized for iris photography according to the present invention.
2 is a schematic cross-sectional view showing features of the iris recognition apparatus according to the present invention.
3 is a view for explaining a conventional cold mirror structure.
4 is a view for explaining a structure of an optical filter according to the present invention.
5 is a view for explaining the structure of another optical filter according to the present invention.
FIG. 6 is a schematic view illustrating a structure of a conventional iris recognition system. Referring to FIG.

Hereinafter, a configuration of an iris recognition apparatus having an optical filter optimized for iris imaging according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a schematic structure of an iris recognition apparatus having an optical filter optimized for iris photography according to the present invention. The iris recognition apparatus includes an optical filter 10, a lens 30, an image pickup element 50, and a processing module 70.

The optical filter 10 is disposed toward the user (i.e., facing the iris of the user) in the iris recognition apparatus, and transmits infrared rays incident from the iris of the user. The optical filter 10 may selectively block or reflect visible light. Thereby, the optical filter 10 may be seen as a shield plate of a specific color or a mirror surface when viewed by the user.

The optical filter 10 may transmit all or a part of visible light, if necessary.

At this time, in the present invention, the optical filter 10 may be composed of the first filter 11 and the second filter 12. [ The first filter 11 corresponds to the peripheral portion of the optical filter 10 as shown and may be configured to reflect or absorb visible light incident from the user side. It can also be configured to reflect or absorb infrared radiation. If necessary, infrared rays may be transmitted. Since the first filter 11 does not play a large role in actual iris imaging, it may be constructed of an inexpensive material such as synthetic resin.

The first filter 11 may have a first opening 14 at any position, particularly at a position corresponding to the position where the lens 30 is to be disposed. A second filter (12) may be mounted in the first opening (14).

The second filter 12 may be, for example, a cold mirror, configured to reflect or absorb visible light incident from the user side, and configured to transmit infrared light.

Thus, light from the user side, in particular infrared, is incident on the lens 30 through the second filter 12 of the first aperture 14 and then is configured to reach the imaging element 50.

The lens 30 has a generally domed outline shape and refracts light (particularly, infrared light) transmitted through the optical filter (particularly, the first aperture) to form an image at a predetermined focal distance. If the lens 30 is of various other shapes, such as square or hexagonal, the shape of the first aperture 14 may be modified accordingly.

The image pickup element 50 is disposed in the vicinity of the focal distance of the lens 30 and detects an image formed through the lens 30 to generate an image. That is, the iris image of the user is photographed to generate the iris image. The generated iris image is transmitted to the processing module 70.

The processing module 70 compares the generated iris image with a pre-stored registered image, and performs iris recognition for determining whether they are identical or not. That is, the processing module 70 may previously hold the registered image (or the iris feature point information extracted from the registered image) in which the iris of the registered user is photographed. When an arbitrary user approaches the iris authentication device and acquires the iris image from the user, the obtained iris image and the previously stored registration image are compared with each other by a comparison algorithm to determine a similar degree, If the user is higher than a predetermined reference value, the user is regarded as the same person as the registered user, and it can be determined that the authentication is successful.

Such an iris authentication device may have a function of controlling the iris of the user to be captured clearly by detecting the approach of the user and adjusting the focus of the lens according to the distance from the user.

The structure of the optical filter 10 disclosed in the present invention will be described in more detail. The first opening 14 formed in the first filter 11 may have any shape and size. In particular, it may be configured in a shape corresponding to the outer shape of the lens 30, and the size thereof may be adjusted according to the optical characteristics with the lens.

Further, as shown in Fig. 2, the size of the lens side 14T of the first opening 14 can be made smaller than the size of the user side 14H.

2 is a schematic cross-sectional view showing features of the iris recognition apparatus according to the present invention. Here, the user side of the optical filter 10 is referred to as H, and the lens side is referred to as T. [

2, the first opening 14H on the user side and the first opening 14T on the lens side are different in size from each other, Lt; / RTI > The second filter 12 may be attached to the horizontal portion of the stepped portion formed in the first opening 14 in a planar manner without a step.

As another example, the first opening 14 may be formed to be inclined in a tapered shape, and a second filter 12 in the form of a truncated cone may be fitted and attached thereto (not shown).

By constituting the first opening 14 in a right angle step, the second filter 12 can be attached / fixed to the first filter 11 by a simple bonding process, so that the manufacturing process can be simplified.

The size of the lens side 14T of the first opening 14 is made to be equal to or smaller than the size of the lens 30 and the step is minimized so that the discarded portion of the second filter 12 is adhered to the periphery And the size of the second filter 12 can be minimized.

Further, since the shape of the first opening 14 is of a garden type similar to the shape of the lens 30 of the garden type, and the shape of the second filter 12 to be attached thereto can also be of a garden type, The manufacturing of the filter 12 is simple and the processing is easy, so that the production defective rate can be minimized.

These features have the effect of lowering the price of the second filter 12 and lowering the overall price of the iris authentication device.

Further, the size of the first opening 14 corresponds to the size of the lens 30, so that the size of the second filter 12 is substantially equal to the size of the first opening 14 The light incident from the user side reaches the lens 30 due to diffuse reflection / refraction by the peripheral portion of the second filter 12, It is possible to minimize the amount of light that can not reach the imaging element 50. This has the effect of improving the quality of the iris image to be photographed, and ultimately improving the performance of the iris authentication.

That is, a conventional conventional cold mirror (corresponding to the second filter of the present invention) 12, which can be referred to FIG. 3, is configured to have a large size such that the front of the lens can be widely covered regardless of the size of the lens And a guide 13 for adjusting the size of the pupil or the iris of the user is printed and added.

Infrared rays transmitted through the periphery portion of the guide 13 (mainly, various lights incident from various directions of the surrounding environment) are transmitted to the lens 30 at random through the whole area of the cold mirror, The quality of the iris image to be photographed may be adversely affected.

On the other hand, the optical filter 10 according to the present invention has a cold mirror corresponding to the size and shape of the lens 30, as shown in Fig. 4, Can be minimized.

4 (a) shows the optical filter viewed from the user side. The first filter 11 may be made of synthetic resin, and the user side surface 11H may be configured to block or reflect visible light and to transmit at least part of the infrared light.

The second filter 12 is disposed in the first opening 14 formed in the first filter 11 and the user's side 12H can be configured to reflect visible light and transmit infrared light.

On the other hand, Fig. 4 (b) shows the optical filter viewed from the lens side. The size of the lens side 14T of the first aperture 14 in which the second filter 12T is exposed may be set smaller than the size of the user side 14H of the first aperture 14, Or less than the size of < / RTI > Accordingly, the second filter 12 will be exposed only to the lens-side first opening 14T corresponding to the size of the lens 30, and will transmit infrared rays only to the exposed portion.

As described above, the optical filter 10 is composed of the first filter 11 and the second filter 12, and the second filter 12 is attached to the first opening 14, It is possible to simplify the shape of the second filter 12 and to reduce the defect rate and the size of the second filter 12, thereby reducing manufacturing costs. In addition, since the first filter 11 can be formed of synthetic resin or the like, various desired shapes can be easily manufactured.

In another embodiment of the present invention, a configuration is disclosed in which the optical filter 10 further includes a second aperture 15. Fig. 5 is a view for explaining the structure of another such optical filter.

A light emitting element (LED) (not shown) is disposed inside the second opening 15 (that is, on the lens side) as shown, and light is emitted from the LED toward the user side to display the operation state of the iris authentication device I can do it.

That is, whether or not the current iris authentication device is operable, whether the distance between the user and the lens of the iris authentication device is appropriate, whether or not iris authentication has been performed, and the like can be displayed.

Further, when comparing the user side H and the lens side T of the optical filter 10 shown in FIG. 5, it can be seen that the size of the second filter 12 is different, And the second filter 12 is attached to the step of the first opening 14 formed in the second filter 12.

11: first filter 12: second filter
14: first opening 15: second opening
30: Lens 50: Image pickup element
70: Processing module
H: User side T: Lens side

Claims (6)

An optical filter (10) for transmitting infrared rays incident from a user side;
A lens (30) for refracting infrared rays transmitted through the optical filter to form a focus;
An imaging device (50) for sensing the infrared rays of the user through the lens to focus the infrared rays;
And a processing module (70) for performing iris recognition for comparing the generated iris image with a previously registered image to judge whether the two are identical or not,
The optical filter (10) comprises:
And a first aperture (14) having a shape and a size corresponding to the shape and size of the lens, wherein the light having passed through the first aperture A first filter (11) arranged to be incident on the lens,
And a second filter (12) fixed to the first opening and transmitting the infrared rays incident from the user side and reflecting the visible rays,
The size of the lens side 14H is set to be equal to or smaller than the size of the lens in the first aperture 14 of the first filter and the size of the user side 14H is set larger than the size of the lens side ,
Wherein the second filter (12) is formed to correspond to the shape and size of the user-side first opening (14H). delete The method according to claim 1,
The cross section of the first opening 14 of the first filter is configured such that the user side 14H and the lens side 14T have stepped portions at right angles,
The iris recognition apparatus according to claim 1, wherein the second filter (12) is configured without a step and attached to a horizontal portion of the step. The method of claim 3,
Wherein the shape of the lens-side first opening (14T) is a garden shape that is equal to or smaller than the size of the lens (30). delete The method according to claim 1,
Wherein the iris recognition device comprises:
Further comprising a light emitting element for displaying an operation state of the iris recognition device to the user through a second opening (15) formed in the first filter at the lens side of the first filter (11) An iris recognition apparatus having an optical filter optimized for iris photography.
KR2020150004192U 2015-06-23 2015-06-23 Iris identifying device having optical filter optimized on taking iris image KR200482563Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018151349A1 (en) * 2017-02-16 2018-08-23 엘지전자 주식회사 Mobile terminal
WO2019164359A1 (en) * 2018-02-23 2019-08-29 삼성전자 주식회사 Method for acquiring image corresponding to infrared rays by using camera module comprising lens capable of absorbing light in visible light band and electronic device implementing same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100582052B1 (en) * 1999-09-03 2006-05-23 엘지전자 주식회사 iris cognition system
KR20030091173A (en) * 2002-05-24 2003-12-03 에버미디어 주식회사 Optical input device for iris recognition
KR100557037B1 (en) * 2003-09-01 2006-03-03 엘지전자 주식회사 Indicated device of iris location for iris recognition system
KR20130076274A (en) * 2011-12-28 2013-07-08 주식회사 유비키이노베이션 Photographing appararus for iris authentication and structure having the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018151349A1 (en) * 2017-02-16 2018-08-23 엘지전자 주식회사 Mobile terminal
WO2019164359A1 (en) * 2018-02-23 2019-08-29 삼성전자 주식회사 Method for acquiring image corresponding to infrared rays by using camera module comprising lens capable of absorbing light in visible light band and electronic device implementing same
US11368636B2 (en) 2018-02-23 2022-06-21 Samsung Electronics Co., Ltd. Method for acquiring image corresponding to infrared rays by using camera module comprising lens capable of absorbing light in visible light band and electronic device implementing same

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