WO2015075951A1 - レンズユニット、撮像装置、および車載カメラ - Google Patents
レンズユニット、撮像装置、および車載カメラ Download PDFInfo
- Publication number
- WO2015075951A1 WO2015075951A1 PCT/JP2014/005894 JP2014005894W WO2015075951A1 WO 2015075951 A1 WO2015075951 A1 WO 2015075951A1 JP 2014005894 W JP2014005894 W JP 2014005894W WO 2015075951 A1 WO2015075951 A1 WO 2015075951A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens unit
- subject
- image
- optical
- groove
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 98
- 238000003384 imaging method Methods 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000006059 cover glass Substances 0.000 description 22
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 and the like Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/20—Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/22—Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle
- B60R1/23—Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle with a predetermined field of view
- B60R1/26—Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle with a predetermined field of view to the rear of the vehicle
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/802—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for monitoring and displaying vehicle exterior blind spot views
Definitions
- the present invention relates to a lens unit, an imaging device, and an in-vehicle camera that suitably remove water droplets from the surface.
- ⁇ ⁇ ⁇ Cameras that are frequently exposed to the outdoor environment such as in-vehicle cameras and surveillance cameras, are known.
- the lens unit used in such an outdoor camera is exposed to rain water, washing water, and the like, and water droplets may adhere to the surface of an optical member such as a lens.
- the water droplets on the surface of the optical member affect the imaging performance of the optical system, so it is desirable to be removed.
- an object of the present invention made in view of such circumstances is to provide a lens unit, an imaging device, and an in-vehicle camera that remove water droplets attached to an optical member.
- the lens unit according to the first aspect is An optical system that is disposed closest to the subject, has at least one groove on the surface of the subject, includes an optical member that transmits the optical image of the subject, and includes an optical system that forms the optical image of the subject. It is.
- the groove is provided in a predetermined region having hydrophilicity on the surface on the subject side.
- a region other than the predetermined region has water repellency.
- the predetermined region includes an outer region of a region in which a light beam of an optical image of a subject within an effective photographing range used for imaging by the optical system passes through the surface on the subject side.
- the predetermined region includes a region where a light beam of an optical image of a subject that is not an observation target passes through the surface on the subject side, which is used by the optical system for imaging.
- the width of the groove is preferably equal to or less than a thickness that cannot be resolved by the optical system.
- the optical member is disposed outside a distance range of a subject to be observed that is predetermined with respect to the optical system.
- At least the groove is preferably black.
- An imaging device is A lens unit having an optical system that is disposed closest to the subject, includes at least one groove on the surface of the subject, and includes an optical member that transmits the optical image of the subject, and forms an optical image of the subject;
- the unit includes an image pickup device that picks up a subject image formed by the unit.
- the on-vehicle camera is A lens unit having an optical system that is disposed closest to the subject, includes at least one groove on the surface of the subject, and includes an optical member that transmits the optical image of the subject, and forms an optical image of the subject;
- An image pickup apparatus having an image pickup device for picking up a subject image formed by the unit is provided.
- the groove is provided in a region where a light beam of an optical image that is not observed in a vehicle on which the in-vehicle camera used is used for imaging by the optical system passes through the surface on the subject side.
- the lens unit, the imaging device, and the in-vehicle camera according to the present invention configured as described above, it is possible to remove water droplets attached to the optical member.
- FIG. 3 is a layout diagram illustrating an installation location in the moving body of the imaging apparatus having the lens unit according to the first embodiment of the present invention. It is sectional drawing along the optical axis of the lens unit in FIG. It is a front view of the cover glass in FIG. It is an optical path figure in a lens unit for explaining a predetermined field in a cover glass.
- FIG. 1 is a layout diagram showing a mounting position of a moving body 12 of an imaging apparatus 11 having a lens unit 10 according to the present embodiment.
- the imaging device 11 is an in-vehicle camera, for example.
- the moving body 12 is a vehicle such as an automobile.
- the imaging device 11 having the lens unit 10 is provided on the moving body 12 together with the display device 13.
- the imaging device 11 is installed outside the moving body 12 and can image the periphery of the moving body 12.
- the imaging device 11 is fixed to the outside of the rear of the moving body 12 in order to capture a peripheral image of the rear view, for example.
- the display device 13 is provided so as to be visible from the driver's seat.
- the lens unit 10 has an optical system that forms a subject image behind the moving body 12 on the image sensor 14 in the image pickup device 11.
- the distance range of the subject to be observed from the optical system 15 is determined in advance, and the image sensor 14 is fixed at a position where the distance range is the depth of focus.
- the imaging device 11 captures a subject image using the imaging element 14 and generates an image signal. Further, the imaging device 11 transmits an image signal to the display device 13.
- the display device 13 displays a subject image corresponding to the received image signal.
- FIG. 2 is a cross-sectional view of the lens unit 10 along the optical axis OX.
- the lens unit 10 includes an optical system 15.
- the optical system 15 includes various optical members including at least one lens 16.
- the optical system 15 includes a plurality of lenses 16 and a cover glass 17 as optical members.
- one along the optical axis OX is defined on the subject side, and the other is defined on the imaging side.
- the plurality of lenses 16 are arranged on the imaging side with respect to the cover glass 17 together with the diaphragm 18 and are accommodated in the housing 19 of the lens unit 10.
- the cover glass 17 is disposed closest to the subject among the optical members that transmit the subject image.
- the cover glass 17 is disposed outside a predetermined distance range from the optical system 15 of the subject to be observed.
- a plurality of lenses 16 and a diaphragm 18 are formed and combined so that the optical system 15 has desired optical characteristics such as a focal length and a depth of field.
- the predetermined area PA is an external area of the area A ⁇ b> 1 where the light beam LX ⁇ b> 1 of the optical image of the subject within the effective shooting range used for image formation by the optical system 15 passes through the surface of the cover glass 17 on the subject side. Includes A2.
- the external area A2 below the cover glass 17 is included in the predetermined area PA.
- the predetermined area PA includes an area A3 used by the optical system 15 for image formation, which is a non-observation subject, for example, the light beam LX2 of the optical image of the car bumper 21 passes through the surface on the object side.
- a hydrophilic coat is applied to the predetermined area PA, and a water repellent coat is applied to the area OA other than the predetermined area PA.
- the width of the groove 20 is equal to or smaller than a thickness that cannot be resolved by the optical system 15, in other words, the width of the image of the groove 20 formed by the optical system 15 is equal to or smaller than the pixel pitch of the image sensor 14. Furthermore, the groove 20 is colored black.
- the groove 20 is provided in the optical member (cover glass 17) arranged closest to the subject, water droplets adhering to the optical member are induced by capillary action. And can be removed.
- the lens unit of the present embodiment since the area OA other than the predetermined area PA has water repellency and the predetermined area PA has hydrophilicity, it adheres to the surface of the optical member (cover glass 17). Water droplets are easily drawn into the predetermined area PA from the area OA other than the predetermined area PA. Therefore, it is possible to improve the water droplet removal property of the lens unit 10.
- the groove 20 is provided in the predetermined area PA, in the image observed by the imaging device 11, it is possible to suppress the reflection of the groove 20 on the subject to be observed. It is.
- the image of the portion of the groove 20 is obtained. Is completely prevented.
- the groove 20 by providing a part of the groove 20 in the region A3 where the light beam LX2 of the optical image of the subject (for example, the bumper 21) that is not the subject of observation used by the optical system 15 passes through the surface on the subject side, It is possible to make the groove 20 reach the inside of the optical member (cover glass 17) while suppressing the influence on the image of the subject. Therefore, water droplets adhering to the center side of the surface of the cover glass 17 can be easily removed.
- the thickness of the groove 20 is equal to or smaller than the thickness that cannot be resolved by the optical system 15, it is possible to suppress the reflection of the groove 20 in the image captured by the imaging device 11. .
- the lens unit of the present embodiment since the lens unit is disposed outside the distance range of the subject to be observed, the imprint of the groove 20 in the image captured by the imaging device 11 can be further suppressed.
- the groove 20 is colored black, it is possible to suppress the influence of the irregular reflection of the optical image incident on the groove 20 on the optical image of the subject formed by the optical system 15. It is.
- the groove 20 is provided in the predetermined area PA, but the light beam LX1 of the optical image of the subject used for imaging by the optical system 15 is outside the area A1 passing through the surface of the cover glass 17 on the subject side. It may be provided only in the area A2. Alternatively, the groove 20 may be provided only in the region A3 where the light beam LX2 of the optical image of the subject outside the observation target that the optical system 15 uses for image formation passes through the surface on the subject side.
- the groove 20 is provided only in the predetermined area PA, but may be provided on the entire surface of the cover glass 17.
- the width of the groove 20 is narrow as in this embodiment and / or the arrangement of the cover glass 17 is outside the distance range of the subject to be focused as in this embodiment, the image observed by the imaging device 11 Imprinting of the groove 20 into the groove can be suppressed.
- the width of the groove 20 is equal to or less than a thickness that cannot be resolved by the optical system 15, but the light beam LX1 of the optical image of the subject used for imaging by the optical system 15 is on the subject side of the cover glass 17.
- the width of the groove 20 is not limited to a thickness that cannot be resolved.
- the groove 20 is colored black, but the entire predetermined area may be colored black.
- the groove 20 is provided in the cover glass 17, but is not limited to the cover glass 17.
- the optical member arranged closest to the subject without a cover glass is a lens, even if the groove 20 is formed in the lens, the same effect as in the present embodiment can be obtained. is there.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Studio Devices (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
Abstract
Description
最も被写体側に配置され、被写体側の表面に少なくとも1つの溝を設け、且つ被写体の光学像を透過する光学部材を含み、被写体の光学像を結像させる光学系を備える
ことを特徴とするものである。
前記被写体側の表面において、親水性を有する所定の領域に前記溝が設けられる
ことが好ましい。
前記所定の領域以外の領域が撥水性を有する
ことが好ましい。
前記所定の領域は、前記光学系が結像に用いる、有効撮影範囲内の被写体の光学像の光束が、前記被写体側の表面を通る領域の外部領域を含む
ことが好ましい。
前記所定の領域は、前記光学系が結像に用いる、観察対象外の被写体の光学像の光束が、前記被写体側の表面を通る領域を含む
ことが好ましい。
前記溝の幅は、前記光学系により解像不能な太さ以下である
ことが好ましい。
前記光学部材が、前記光学系に対して予め定められる、観察対象の被写体の距離範囲の外側に配置される
ことが好ましい。
少なくとも前記溝は、黒色である
ことが好ましい。
最も被写体側に配置され、被写体側の表面に少なくとも1つの溝を設け、且つ被写体の光学像を透過する光学部材を含み、被写体の光学像を結像させる光学系を有するレンズユニットと、該レンズユニットが結像する被写体像を撮像する撮像素子とを備える
ことを特徴としている。
最も被写体側に配置され、被写体側の表面に少なくとも1つの溝を設け、且つ被写体の光学像を透過する光学部材を含み、被写体の光学像を結像させる光学系を有するレンズユニットと、該レンズユニットが結像する被写体像を撮像する撮像素子とを有する撮像装置を備える
ことを特徴としている。
前記溝は、前記光学系が結像に用いる、前記車載カメラが搭載される車両における観察対象外の光学像の光束が、前記被写体側の表面を通る領域に設けられることが好ましい。
11 撮像装置
12 移動体
13 表示装置
14 撮像素子
15 光学系
16 レンズ
17 カバーガラス
18 絞り
19 筐体
20 溝
21 バンパー
A1 光学系が結像に用いる被写体の光学像の光束がカバーガラスの被写体側の表面を通る領域
A2 外部領域
A3 光学系が結像に用いる観察対象外の被写体の光学像の光束が被写体側の表面を通る領域
LX1 有効撮影範囲内の被写体の光学像の光束
LX2 観察対象外の被写体の光学像の光束
OA 所定の領域以外の領域
OX 光軸
PA 所定の領域
Claims (11)
- 最も被写体側に配置され、被写体側の表面に少なくとも1つの溝を設け、且つ被写体の光学像を透過する光学部材を含み、被写体の光学像を結像させる光学系を備えることを特徴とするレンズユニット。
- 請求項1に記載のレンズユニットであって、
前記被写体側の表面において、親水性を有する所定の領域に前記溝が設けられる
ことを特徴とするレンズユニット。 - 請求項2に記載のレンズユニットであって、
前記所定の領域以外の領域が撥水性を有する
ことを特徴とするレンズユニット - 請求項2または請求項3に記載のレンズユニットであって、
前記所定の領域は、前記光学系が結像に用いる、有効撮影範囲内の被写体の光学像の光束が、前記被写体側の表面を通る領域の外部領域を含む
ことを特徴とするレンズユニット。 - 請求項2から請求項4のいずれか1項に記載のレンズユニットであって、
前記所定の領域は、前記光学系が結像に用いる、観察対象外の被写体の光学像の光束が、前記被写体側の表面を通る領域を含む
ことを特徴とするレンズユニット。 - 請求項1から請求項5のいずれか1項に記載のレンズユニットであって、
前記溝の幅は、前記光学系により解像不能な太さ以下である
ことを特徴とするレンズユニット。 - 請求項1から請求項6のいずれか1項に記載のレンズユニットであって、
前記光学部材が、前記光学系に対して予め定められる、観察対象の被写体の距離範囲の外側に配置される
ことを特徴とするレンズユニット。 - 請求項1から請求項7のいずれか1項に記載のレンズユニットであって、
少なくとも前記溝は、黒色である
ことを特徴とするレンズユニット。 - 請求項1から請求項8のいずれか1項に記載のレンズユニットと、該レンズユニットが結像する被写体像を撮像する撮像素子とを備える
ことを特徴とする撮像装置。 - 請求項9に記載の撮像装置を備えることを特徴とする車載カメラ。
- 請求項10に記載の車載カメラであって、
前記溝は、前記光学系が結像に用いる、前記車載カメラが搭載される車両における観察対象外の光学像の光束が前記被写体側の表面を通る領域に、設けられる
ことを特徴とする車載カメラ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14864760.5A EP3076217B1 (en) | 2013-11-25 | 2014-11-25 | Lens unit, image-capturing device, and vehicle-mounted camera |
JP2015548999A JP6568799B2 (ja) | 2013-11-25 | 2014-11-25 | レンズユニット、撮像装置、および車載カメラ |
US15/038,934 US10247939B2 (en) | 2013-11-25 | 2014-11-25 | Lens unit, imaging apparatus, and on-vehicle camera |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-243053 | 2013-11-25 | ||
JP2013243053 | 2013-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015075951A1 true WO2015075951A1 (ja) | 2015-05-28 |
Family
ID=53179231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/005894 WO2015075951A1 (ja) | 2013-11-25 | 2014-11-25 | レンズユニット、撮像装置、および車載カメラ |
Country Status (4)
Country | Link |
---|---|
US (1) | US10247939B2 (ja) |
EP (1) | EP3076217B1 (ja) |
JP (1) | JP6568799B2 (ja) |
WO (1) | WO2015075951A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022230024A1 (ja) * | 2021-04-26 | 2022-11-03 | オリンパス株式会社 | 内視鏡の対物光学素子 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3171217B1 (en) * | 2015-11-17 | 2017-10-25 | Axis AB | Camera cover glass unit with water removal function |
DE102020124959B4 (de) * | 2020-09-24 | 2023-10-12 | Mekra Lang Gmbh & Co. Kg | Kamerasystem |
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- 2014-11-25 EP EP14864760.5A patent/EP3076217B1/en active Active
- 2014-11-25 US US15/038,934 patent/US10247939B2/en active Active
- 2014-11-25 WO PCT/JP2014/005894 patent/WO2015075951A1/ja active Application Filing
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---|---|---|---|---|
WO2022230024A1 (ja) * | 2021-04-26 | 2022-11-03 | オリンパス株式会社 | 内視鏡の対物光学素子 |
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US10247939B2 (en) | 2019-04-02 |
EP3076217A4 (en) | 2017-07-19 |
EP3076217B1 (en) | 2022-04-13 |
US20160377860A1 (en) | 2016-12-29 |
JPWO2015075951A1 (ja) | 2017-03-16 |
EP3076217A1 (en) | 2016-10-05 |
JP6568799B2 (ja) | 2019-08-28 |
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