WO1996035977A1 - An opening and shutting device of infrared-ray filter for cameras - Google Patents

An opening and shutting device of infrared-ray filter for cameras Download PDF

Info

Publication number
WO1996035977A1
WO1996035977A1 PCT/KR1996/000070 KR9600070W WO9635977A1 WO 1996035977 A1 WO1996035977 A1 WO 1996035977A1 KR 9600070 W KR9600070 W KR 9600070W WO 9635977 A1 WO9635977 A1 WO 9635977A1
Authority
WO
WIPO (PCT)
Prior art keywords
infrared
catching
operation lever
ray filter
lens cylinder
Prior art date
Application number
PCT/KR1996/000070
Other languages
French (fr)
Inventor
Sung Wook Ko
Original Assignee
Korea Communications Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Korea Communications Co., Ltd. filed Critical Korea Communications Co., Ltd.
Publication of WO1996035977A1 publication Critical patent/WO1996035977A1/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems

Definitions

  • the present Invention relates to opening and shutting device of the infrared-ray filter for cameras, which makes it possible to form clear images by selectively adjusting the amount of infrared ray absorbed into the photographic elements through the infrared-ray filter with a built-in opening-shutting device, the filter being set in the rear of the lens channel inside a camera.
  • the photographic elements in a camera work upon perception of visible rays and infrared ray, and when light passes through the lens of a camera the visible rays are separated into three colors via an R.G.B. filter, and reach the photographic elements
  • the present invention is intended to solve such problems as given above.
  • the device for controlling an infrared-ray filter inside cameras of the present invention makes role of shutting off infrared ray in the rear of the lens cylinder inside a camera, by the bye, said device is characterized by consisting of a catching protuberance formed in the center of the operation lever attaching said filter; one side of the joining block, with a catching hole on the other side of it to receive said catching protuberance, is inserted so as to be able to more back and forth internally in an electric magnet which is connected with publicly known sensor of illuminance of light, and said operation lever rotates in association with said joining block.
  • Fig. 1 is a side-view of an opening and shutting device of the infrared-ray filter in accordance with the present invention.
  • Fig. 2 is a perspective view of an opening and shutting device of the infrared-ray filter in accordance with the present invention.
  • Fig. 3 is a dismantled perspective view of an opening and shutting device of the infrared-ray filter in accordance with the present invention. Detailed Description of the Invention
  • the present device for opening and shutting the filter inside a camera is made of a supporting board 1, in whose under part the rear end of a lens cylinder 2 passes through and is fixed, and on whose upper part a hinge peg 3 is formed projecting; an operation lever 5, in whose upper part an insertion hole 3' is formed to receive said hinge peg 3, to whose under part a filter for adjustment of ultrared-ray absorption is attached, and in whose central part a catching protuberance 6 is formed; a joining block 7, whose one side, with a catching hole 6' on the other side of it to receive a catching protuberance 6, is inserted so as to be able to move back and forth internally in an electric magnet 10, which is connected with a publicly known sensor of illuminance of light; a pan spring 8, which is fitted elastically between said operation lever 5 and said joining block 7 in order to give the recovery force to said operation lever 5, in a way that its center hole 9 may be passed through by said hinge peg 3,

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Studio Devices (AREA)
  • Camera Bodies And Camera Details Or Accessories (AREA)
  • Blocking Light For Cameras (AREA)

Abstract

The present invention relates to an opening and shutting device of infrared-ray filter for cameras, the device being constructed in a way that an operating lever (5), which having an infrared ray filter (4) attached to its under part and a catching protuberance (6) formed projecting in its center, can get a hinge peg (3) formed projecting on the upper part of a supporting board to be inserted in an insertion hole (3') formed in its upper part; that a joining block (7) which has on one side a catching hole (6') formed to fit said catching protuberance (6) of said operation lever (5), is set inside an electric magnet (10) to slide along back and forth on to outside and inside; and that a pan spring (8) is fitted elastically between said operation lever (5) and said joining block (7); wherein it is possible to adjust the quantity of the infrared-ray passing through a lens cylinder (2) to reach photographic elements (11) by selectively shutting off the passage of light at the rear end of said lens cylinder (2), accordingly as the infrared ray passing through said lens cylinder (2) varies, so that clear photo images may be obtained, and that a camera can be used for night watch or inspection in the dark also, if an infrared lamp of luminous diode is made use of.

Description

An Opening and Shutting Device of Infrared-Ray
Filter for Cameras
Field of The Invention
The present Invention relates to opening and shutting device of the infrared-ray filter for cameras, which makes it possible to form clear images by selectively adjusting the amount of infrared ray absorbed into the photographic elements through the infrared-ray filter with a built-in opening-shutting device, the filter being set in the rear of the lens channel inside a camera.
1 0 Prior Art Relative To The Invention
Generally, the photographic elements in a camera work upon perception of visible rays and infrared ray, and when light passes through the lens of a camera the visible rays are separated into three colors via an R.G.B. filter, and reach the photographic elements
1 5 11 to form an image, while infrared ray untrammeled by the R.G.B. filter directly reaches the photographic elements 11 and affects them 11. If the infrared ray remains below a certain quantity, its influence on the photographic elements 11 in forming the color tone is not much, but at places where and times when, its quantity is
20 much its influence on the photographic elements 11 is also more than is desired, hindering the R.G.B. filter from forming an ideal color tone and making it impossible to produce clear images.
With a view to preventing this latter from occurring, conventional cameras have an infrared-ray filter set behind the lens 5 cvlinder inside them to have it shut off much infrared ray, but the problem is that this filter is fixed unmovable, wherefore under such circumstances as light is very little, part of even the little light is shut off by this fixed filter reducing the illuminance to lower than required for the photographic elements 11 to function, thus undesirably affecting the elements 11 to function, thus undesirably affecting the elements 11 and reducing the photographic sensitivity; and when it is wanted to watch for things outdoor in the darkness by means of an infrared lamp or luminous diode LED it is impossible to do so because of the fixed filter.
Summary of The Invention
The present invention is intended to solve such problems as given above. The device for controlling an infrared-ray filter inside cameras of the present invention makes role of shutting off infrared ray in the rear of the lens cylinder inside a camera, by the bye, said device is characterized by consisting of a catching protuberance formed in the center of the operation lever attaching said filter; one side of the joining block, with a catching hole on the other side of it to receive said catching protuberance, is inserted so as to be able to more back and forth internally in an electric magnet which is connected with publicly known sensor of illuminance of light, and said operation lever rotates in association with said joining block.
Therefore the passage of light in the rear of said lens cylinder is shut selectively and then the amount of infrared-ray reached to the photographic elements can be controlled pertinently.
Brief Description of Drawings
Fig. 1 is a side-view of an opening and shutting device of the infrared-ray filter in accordance with the present invention.
Fig. 2 is a perspective view of an opening and shutting device of the infrared-ray filter in accordance with the present invention.
Fig. 3 is a dismantled perspective view of an opening and shutting device of the infrared-ray filter in accordance with the present invention. Detailed Description of the Invention
The present invention will be described, in detail, with reference to the attached drawings as is given below:
As will be seen in Figs. 1 through 3, the present device for opening and shutting the filter inside a camera is made of a supporting board 1, in whose under part the rear end of a lens cylinder 2 passes through and is fixed, and on whose upper part a hinge peg 3 is formed projecting; an operation lever 5, in whose upper part an insertion hole 3' is formed to receive said hinge peg 3, to whose under part a filter for adjustment of ultrared-ray absorption is attached, and in whose central part a catching protuberance 6 is formed; a joining block 7, whose one side, with a catching hole 6' on the other side of it to receive a catching protuberance 6, is inserted so as to be able to move back and forth internally in an electric magnet 10, which is connected with a publicly known sensor of illuminance of light; a pan spring 8, which is fitted elastically between said operation lever 5 and said joining block 7 in order to give the recovery force to said operation lever 5, in a way that its center hole 9 may be passed through by said hinge peg 3, which has passed through said insertion hole 3' joining block 7; and a catching chin 13, formed of one side of said supporting board 1 to control the extent of operation of said operation lever 5.
The function and effects of the device according to the present invention described above will be described below: When much light passes through said lens cylinder 2, the quantity of the infrared ray contained in it is also much, and accordingly the publicly known illuminance sensor starts functioning, shutting off the power flowing to an electric magnet 10, whereupon said infrared-ray filter 4 of said operation lever 5 rotates in a direction by the recovery force of said pan spring 8 until it is caught at a catching chin 13 and thereby shuts the passage of light in the rear of said lens cylinder 2, thus hindering infrared ray from passing through to said photographic elements 11; when little light passes through said lens cylinder 2 the quantity of infrared ray is also little, and accordingly said illuminance sensor stops functioning, whereupon making power flow to said electric magnet 10 causing the magnetic field around said electric magnet 10 to change and said joining block 7 to get inserted in inside said electric magnet 10, in association with which, said operation lever 5 rotates in the direction opposite to the direction it takes when light is much, thus opening the rear end of said lens cylinder 2 to lead all light including infrared ray to pass through to reach said photographic elements 11.
Accordingly, it is only possible to secure clear images by selectively adjusting the amount of infrared ray by means of the device for controlling the infrared ray filter according as the quantity of infrared ray passing through said lens cylinder 2 is much or little, and when said filter 4 is fully opened, said photographic elements 11 can cover the area where infrared ray functions, even beyond the realm of visible rays' functioning whereby distinction of images gets possible in the dark, thus such cameras, with the use of infrared lamps or luminous diodes LED, can be made available for watch and inspection in the darkness of night, too.

Claims

Claims
1. An opening and shutting device of infrared-ray filter for cameras characterized by consisting of; a supporting board 1, with the rear end of a lens cylinder 2 passing through its under part and getting fixed there, and a hinge peg 3 being formed protruding in its upper part; an operation lever 5, with an insertion hole 3' formed in its upper part so that said hinge peg 3 can be inserted in this hole, an infrared-ray filter 4 attached to the under part, and catching o protuberance 6 formed protruding in the center; a joining block 7, one side is inserted movably for sliding back and forth both inside and outside in an electric magnet 10 which is connected with a publicly known illuminance sensor on the other side the a catching hole 6' is punished to receive a catching 5 protuberance 6; a pan spring 8, which is inserted elastically between said operation lever 5 and said joining block 7 to give said operation lever 5 the recovery force, in such a way that a center hole 9 formed in its center may be passed through by said hinge peg 3, which first 0 passes through said insertion hole 5'; and, a catching chin 13, which is formed on one side of said supporting board 1 with an objective to limit the range of operation of said operating lever 5.
PCT/KR1996/000070 1995-05-10 1996-05-08 An opening and shutting device of infrared-ray filter for cameras WO1996035977A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2019950009879U KR0132789Y1 (en) 1995-05-10 1995-05-10 Open/close apparatus of infrared filter for a camera
KR1995/9879U 1995-05-10

Publications (1)

Publication Number Publication Date
WO1996035977A1 true WO1996035977A1 (en) 1996-11-14

Family

ID=19412969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1996/000070 WO1996035977A1 (en) 1995-05-10 1996-05-08 An opening and shutting device of infrared-ray filter for cameras

Country Status (3)

Country Link
KR (1) KR0132789Y1 (en)
TW (1) TW307387U (en)
WO (1) WO1996035977A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010117105A1 (en) * 2009-04-07 2010-10-14 (주)씨프로 Filter change assembly for camera module which uses electromagnetic rotating device, and operating method thereof
WO2015149711A1 (en) * 2014-04-03 2015-10-08 华为技术有限公司 Infrared control device and method, and camera
EP2193397B1 (en) * 2004-12-16 2018-12-26 QUALCOMM Incorporated Optical system
WO2018233277A1 (en) * 2017-06-19 2018-12-27 西安中兴新软件有限责任公司 Detection method and device and storage medium

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030010018A (en) * 2001-07-25 2003-02-05 삼성전기주식회사 Pc camera
KR20030058794A (en) * 2001-12-31 2003-07-07 주식회사 아이에스티 Optical filter switching device using an electromagnet
KR100653698B1 (en) * 2004-09-07 2006-12-04 주식회사 비젼아이트 CCTV camera with a detachable infrared filter
KR101582159B1 (en) * 2013-12-12 2016-01-11 금오공과대학교 산학협력단 Filter change assembly for a camera module using a electromagnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142940A1 (en) * 1981-10-29 1983-05-11 Kodak Ag, 7000 Stuttgart Photographic camera equipped with a computer flash unit
US5070407A (en) * 1990-05-11 1991-12-03 Wheeler Ernest E Filter changing mechanism for a video camera
DE4210555A1 (en) * 1992-03-31 1993-10-07 Kernforschungsz Karlsruhe Camera front attachment optic - has pivoting colour filter for remote viewing of welding process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142940A1 (en) * 1981-10-29 1983-05-11 Kodak Ag, 7000 Stuttgart Photographic camera equipped with a computer flash unit
US5070407A (en) * 1990-05-11 1991-12-03 Wheeler Ernest E Filter changing mechanism for a video camera
DE4210555A1 (en) * 1992-03-31 1993-10-07 Kernforschungsz Karlsruhe Camera front attachment optic - has pivoting colour filter for remote viewing of welding process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2193397B1 (en) * 2004-12-16 2018-12-26 QUALCOMM Incorporated Optical system
WO2010117105A1 (en) * 2009-04-07 2010-10-14 (주)씨프로 Filter change assembly for camera module which uses electromagnetic rotating device, and operating method thereof
KR100996470B1 (en) * 2009-04-07 2010-11-25 (주)씨프로 A filter change assembly for a camera module using a electromagnet rotation device
WO2015149711A1 (en) * 2014-04-03 2015-10-08 华为技术有限公司 Infrared control device and method, and camera
WO2018233277A1 (en) * 2017-06-19 2018-12-27 西安中兴新软件有限责任公司 Detection method and device and storage medium

Also Published As

Publication number Publication date
TW307387U (en) 1997-06-01
KR0132789Y1 (en) 1999-03-30
KR960038319U (en) 1996-12-18

Similar Documents

Publication Publication Date Title
WO1996035977A1 (en) An opening and shutting device of infrared-ray filter for cameras
US4316658A (en) Camera for close-up and normal range photography
US4316659A (en) Infrared filter exposure compensation apparatus
EP0620476B1 (en) Photograpic lighting system using incident light meter
US3999195A (en) Camera adjustable exposure control adapter
US4304476A (en) Partial infrared filter exposure compensation apparatus
JP2531184B2 (en) Camera viewfinder
JP2000241800A (en) Display device of camera
US4106038A (en) Indicator in a finder
US4179199A (en) Combination motion picture camera and viewing apparatus
KR200203916Y1 (en) Light control devices for camera and camera comprising them
KR200171499Y1 (en) Light control devices for camera and camera comprising them
US4045806A (en) Extended range exposure control system
DE4417234C2 (en) Fotometriesystem
KR900008235B1 (en) White ballance control circuit for video camera
JPH0318690B2 (en)
KR200283611Y1 (en) Auto camera
JPS614388A (en) Display device of video camera
KR970003031B1 (en) Iris for small image pick-up device
JPS6041546Y2 (en) single lens reflex camera
KR970003341Y1 (en) Filter box for a camera
JPH01235930A (en) Camera with lighting type finder
JPS5837055Y2 (en) photo camera
JPH03101088U (en)
JPH0243128B2 (en)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN DE ES GB JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase