EP1676164A1 - Dispositif de prise de vue à encombrement reduit - Google Patents
Dispositif de prise de vue à encombrement reduitInfo
- Publication number
- EP1676164A1 EP1676164A1 EP04791239A EP04791239A EP1676164A1 EP 1676164 A1 EP1676164 A1 EP 1676164A1 EP 04791239 A EP04791239 A EP 04791239A EP 04791239 A EP04791239 A EP 04791239A EP 1676164 A1 EP1676164 A1 EP 1676164A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical means
- object field
- sensor
- optical
- parts
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0804—Catadioptric systems using two curved mirrors
- G02B17/0816—Catadioptric systems using two curved mirrors off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/04—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/1066—Beam splitting or combining systems for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/123—The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
-
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/40—Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled
- H04N25/41—Extracting pixel data from a plurality of image sensors simultaneously picking up an image, e.g. for increasing the field of view by combining the outputs of a plurality of sensors
-
- 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
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
- G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
-
- 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
Definitions
- the invention relates to a shooting device. More and more people are trying to reduce the size of the shooting devices.
- shooting devices comprising a sensor produced on an electronic component and surmounted by optical means.
- a shooting device has a horizontal object field of 50 ° and a matrix sensor comprising 640 points in line and 480 points in column well known in Anglo-Saxon literature under the name of VGA sensor (video graphics array ).
- the optical means must then have a minimum focal distance of 3.8mm. By using only a converging lens to produce the optical means, it is impossible to reduce the height of the optical means, measured along the optical axis of the lens, below the focal distance, ie 3.8 mm.
- such optical means do not have a height of less than 6 mm. Indeed the thickness of the lens tends to lengthen the optical path.
- a VGA format shooting device having a horizontal object field of 50 ° actually has a total object field of 66 ° measured on the diagonal of the sensor. This wide field leads to higher aberrations the greater the aperture.
- lenses are used whose surfaces are aspherical. On the other hand, the use of this type of lens imposes tight positioning tolerances between the lenses and with respect to the sensor.
- the subject of the invention is a shooting device comprising a sensor and optical means by which the device receives and directs towards the sensor a light radiation in an object field, characterized in that the optical means comprise at minus a mirror and several input pupils each observing a part of the object field, and in that the light radiation observed by each pupil is directed by optical means towards a separate part of the sensor.
- a device comprises a sensor and optical means 1 by which the device receives and directs towards the sensor a light radiation in the object field.
- the object field observed by the optical means 1 is centered around an axis z.
- the optical means 1 observe an object field centered around an axis z.
- the object field extends over 50 ° in a horizontal plane formed by an x axis and the z axis.
- the object field extends over 38 ° in a vertical plane formed by a y axis and the z axis.
- the x, y and z axes form an orthogonal coordinate system.
- the object field is divided into several parts. In the example shown in Figure 1, the object field is divided into four equal parts 2 to 5 each located in a quadrant of a plane defined by the x and y axes.
- Each part has a horizontal field of 25 ° and a vertical field of 19 °.
- the optical axis of each part is shown in phantom in Figure 1.
- the angular dimensions of each part being smaller than the angular dimensions of the complete field, the realization of the optical means is thereby facilitated.
- This advantage is all the greater when the maximum opening of the entrance pupil is large.
- the different parts 2 to 5 of the object field partially overlap. This overlap facilitates the reconstruction of the complete image of the object field. This reconstruction is not developed here, it can be done by computer means by comparing overlapping zones 6 of each part 2 to 5.
- FIG. 2 represents an image plane associated with the object field by optical means 1. The plane image is formed on the sensor which will be described later.
- the image plane is divided into four parts 10 to 13 each corresponding to one of parts 2 to 5 of the object field.
- Each part of the object field is associated with an entrance pupil centered on one of the optical axes shown in phantom in Figure 1.
- the entrance pupils are for example circular and we find the image of their circumference on the image plan. However, we will only use the surface inside a square inscribed in the circle to reconstruct the complete image of the object field. This square surface is called the useful part of the image plane.
- four useful parts 14 to 17 correspond respectively to the four parts 10 to 13 of the image plane.
- a space 18 is provided separating the different useful parts 14 to 17 and preventing one of the parts 10 to 13 of the image plane from covering one of the four useful parts 14 to 17.
- the pupils of The entrance has a geometry similar to that of the useful parts 14 to 17.
- the useful parts have a square geometry, use will also be made of the entrance pupils of the square.
- This square geometry is represented in FIG. 3 in which, for the sake of simplicity, the same references have been used as in FIG. 2.
- FIG. 4 represents the optical path followed by radiation passing through one of the entrance pupils 20.
- the device further comprises two mirrors 21 and 22 associated with the entrance pupil 20 as well as a sensor 23.
- the optical means 1 comprise at least two mirrors, in this case 21 and 22, associated with each part of the object field.
- This optical configuration known as catadioptric, makes it possible to fold the optical path and therefore to greatly reduce the overall size of the device, size whose dimension 24 is representative.
- the catadioptric configuration is in practice achievable only for a reduced field, this is why the invention consists in the association of the division of the object field and of a catadioptric configuration.
- FIG. 5 makes it possible to view the repetition of the configuration described using FIG. 4 as many times as the division of the object field.
- the field has been divided into four parts each associated with an entrance pupil 20 and the retro-reflecting configuration described with the aid of FIG. 4 has been repeated four times.
- the references in FIG. 4 have been reported four times.
- the four sensors 23 appear distinct. It is of course possible to group them on a single electronic component comprising for example a CMOS type sensor. The electronic component is then produced on a single substrate, for example made of silicon.
- signal processing means for example the decoding of row and column addresses, can be positioned in the space 18 between the useful parts.
- the light radiation observed by each pupil 20 is permanently directed by the optical means 1 to a separate part of the sensor 23.
- any sequential device is avoided in the optical path between the pupils and the sensor.
- Such a sequential device would limit the sensitivity of the sensor and the choice of sensor processing frequency.
- the optical means 1 formed by the entrance pupils 20 and the mirrors 21 and 22 can be produced in a single transparent piece whose surfaces forming the mirrors 21 and 22 are treated to be reflective.
- the transparent part is for example made of polycarbonate or polymethilmetacrylate.
- the optical means 1 comprise at least one element with negative optical power.
- This element makes it possible to reduce the length of the optical path between the entrance pupil 20 and the sensor 23. This further reduces the size of the device by reducing the dimension 24 shown in FIG. 4.
- the element with negative optical power is for example one of the mirrors 21 or 22 or also a divergent lens placed between the entrance pupil 20 and the mirror 21.
- the fact of dividing the object field has many advantages. For given optical means 1, it can be verified that the geometric distortion increases with the field. For example, for a horizontal object field of 50 °, we can achieve a distortion of the order of 4%.
- the geometric distortion remains much less than 1%.
- Another advantage linked to the division of the field is the improvement of the telecentricity at the level of the sensor 23. It is recalled that the telecentricity represents the difference between the incidence of a radiation illuminating the sensor 23 and a normal incidence on this same sensor 23.
- the telecentricity increases with the field and certain types of sensors, such as CMOS sensors, are sensitive to the incidence of the radiation they receive. Their dynamics decrease when the incidence deviates from the normal incidence.
- the contrast is improved as a function of the spatial frequency of the radiation. As before, the contrast decreases with the object field. By dividing the object field, the contrast is therefore improved as a function of the spatial frequency of the radiation.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
- Studio Devices (AREA)
- Structure And Mechanism Of Cameras (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Vehicle Body Suspensions (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0312295A FR2861187B1 (fr) | 2003-10-21 | 2003-10-21 | Dispositif de prise de vue a encombrement reduit |
PCT/EP2004/052558 WO2005038503A1 (fr) | 2003-10-21 | 2004-10-15 | Dispositif de prise de vue à encombrement réduit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1676164A1 true EP1676164A1 (fr) | 2006-07-05 |
Family
ID=34385346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04791239A Withdrawn EP1676164A1 (fr) | 2003-10-21 | 2004-10-15 | Dispositif de prise de vue à encombrement reduit |
Country Status (6)
Country | Link |
---|---|
US (1) | US7639941B2 (fr) |
EP (1) | EP1676164A1 (fr) |
JP (1) | JP2007509554A (fr) |
CA (1) | CA2539540A1 (fr) |
FR (1) | FR2861187B1 (fr) |
WO (1) | WO2005038503A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100716829B1 (ko) * | 2005-08-10 | 2007-05-09 | 삼성전기주식회사 | 초박형 모바일 카메라 광학 렌즈 시스템 및 이를 이용한이미지 결상 방법 |
DE102011081405B4 (de) * | 2011-08-23 | 2016-09-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Bildsensor, Abbildungsvorrichtung und Verfahren für einen Bildsensor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5016109A (en) * | 1990-07-02 | 1991-05-14 | Bell South Corporation | Apparatus and method for segmenting a field of view into contiguous, non-overlapping, vertical and horizontal sub-fields |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
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DE1016033B (de) | 1954-07-03 | 1957-09-19 | Leitz Ernst Gmbh | Vorrichtung zur Aufnahme oder Wiedergabe von Panoramabildern |
US3582547A (en) * | 1968-10-21 | 1971-06-01 | Goodyear Aerospace Corp | Multiple-channel vergent conjugates imagery generator system |
JPS5672575A (en) * | 1979-11-19 | 1981-06-16 | Toshiba Corp | Picture input unit |
JPH0191453A (ja) * | 1987-10-02 | 1989-04-11 | Fuji Photo Film Co Ltd | 固体撮像装置 |
JPH07222038A (ja) * | 1994-02-04 | 1995-08-18 | Canon Inc | 撮像装置 |
US5692226A (en) * | 1994-09-28 | 1997-11-25 | Hall; Dennis R. | Stereoscopic recording systems utilizing chiral liquid crystals |
JPH08234339A (ja) * | 1995-02-28 | 1996-09-13 | Olympus Optical Co Ltd | 撮影用光学装置 |
US6166866A (en) * | 1995-02-28 | 2000-12-26 | Canon Kabushiki Kaisha | Reflecting type optical system |
GB9616390D0 (en) * | 1996-08-03 | 1996-09-11 | Secr Defence | Optical detection system |
JP3622367B2 (ja) * | 1996-10-01 | 2005-02-23 | 松下電器産業株式会社 | 画像入力装置 |
DE19742462A1 (de) * | 1997-09-26 | 1999-04-01 | Bodenseewerk Geraetetech | Einrichtung zur Erfassung mehrerer Gesichtsfelder mittels eines bildauflösenden Detektors |
DE19847563A1 (de) * | 1998-04-17 | 1999-10-28 | Micronas Intermetall Gmbh | Kapazitiver Sensor |
US6459490B1 (en) * | 1999-06-01 | 2002-10-01 | Optical Perspectives Group, L.L.C. | Dual field of view optical system for microscope, and microscope and interferometer containing the same |
JP2001004809A (ja) * | 1999-06-22 | 2001-01-12 | Olympus Optical Co Ltd | 光学系及び光学装置 |
JP2001036776A (ja) * | 1999-07-15 | 2001-02-09 | Mitsubishi Electric Corp | 撮像装置 |
US6643460B2 (en) * | 2000-01-27 | 2003-11-04 | Nikon Corporation | Camera and focal point detection apparatus |
JP2001218230A (ja) * | 2000-02-02 | 2001-08-10 | Canon Inc | 立体撮像装置 |
JP2002158913A (ja) * | 2000-11-16 | 2002-05-31 | Canon Inc | 撮像装置及び撮像方法 |
JP2002171537A (ja) * | 2000-11-30 | 2002-06-14 | Canon Inc | 複眼撮像系、撮像装置および電子機器 |
JP4907034B2 (ja) * | 2001-05-31 | 2012-03-28 | マグナチップセミコンダクター有限会社 | Cmos型イメージセンサ |
JP2003143459A (ja) * | 2001-11-02 | 2003-05-16 | Canon Inc | 複眼撮像系およびこれを備えた装置 |
JP4079630B2 (ja) * | 2001-11-28 | 2008-04-23 | オリンパス株式会社 | 撮像レンズ及びそれを備えた撮像装置 |
US20030227696A1 (en) * | 2002-06-06 | 2003-12-11 | David Joel Maker | Telescope sparse array not requiring the use of laser interferometry |
-
2003
- 2003-10-21 FR FR0312295A patent/FR2861187B1/fr not_active Expired - Fee Related
-
2004
- 2004-10-15 WO PCT/EP2004/052558 patent/WO2005038503A1/fr active Search and Examination
- 2004-10-15 US US10/576,462 patent/US7639941B2/en not_active Expired - Fee Related
- 2004-10-15 JP JP2006536083A patent/JP2007509554A/ja active Pending
- 2004-10-15 CA CA002539540A patent/CA2539540A1/fr not_active Abandoned
- 2004-10-15 EP EP04791239A patent/EP1676164A1/fr not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5016109A (en) * | 1990-07-02 | 1991-05-14 | Bell South Corporation | Apparatus and method for segmenting a field of view into contiguous, non-overlapping, vertical and horizontal sub-fields |
Also Published As
Publication number | Publication date |
---|---|
US20070035823A1 (en) | 2007-02-15 |
JP2007509554A (ja) | 2007-04-12 |
US7639941B2 (en) | 2009-12-29 |
WO2005038503A1 (fr) | 2005-04-28 |
FR2861187A1 (fr) | 2005-04-22 |
CA2539540A1 (fr) | 2005-04-28 |
FR2861187B1 (fr) | 2006-01-20 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Ipc: G02B 27/14 20060101AFI20091106BHEP Ipc: G02B 13/00 20060101ALI20091106BHEP Ipc: G02B 17/08 20060101ALI20091106BHEP |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: G02B 17/08 20060101ALI20091127BHEP Ipc: G02B 13/00 20060101ALI20091127BHEP Ipc: H04N 3/15 20060101ALN20091127BHEP Ipc: G02B 27/14 20060101AFI20091127BHEP |
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Effective date: 20100609 |