EP1825668A1 - Diaphragme de protection contre la lumiere diffusee dans une camera - Google Patents

Diaphragme de protection contre la lumiere diffusee dans une camera

Info

Publication number
EP1825668A1
EP1825668A1 EP05803057A EP05803057A EP1825668A1 EP 1825668 A1 EP1825668 A1 EP 1825668A1 EP 05803057 A EP05803057 A EP 05803057A EP 05803057 A EP05803057 A EP 05803057A EP 1825668 A1 EP1825668 A1 EP 1825668A1
Authority
EP
European Patent Office
Prior art keywords
camera arrangement
ramp
camera
primary
light
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Withdrawn
Application number
EP05803057A
Other languages
German (de)
English (en)
Inventor
Stefan Bischoff
Gunther Schaaf
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1825668A1 publication Critical patent/EP1825668A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
    • B60R2011/0003—Arrangements for holding or mounting articles, not otherwise provided for characterised by position inside the vehicle
    • B60R2011/0026—Windows, e.g. windscreen

Definitions

  • Night View systems which have an infrared camera mounted directly behind the windshield at the level of the rearview mirror.
  • Such used infrared cameras have to reduce the influence of disturbing stray light on a lens hood.
  • the inserted lens hood reduces the influence of stray light entering the camera.
  • the camera assembly includes a camera located in the vehicle interior behind the
  • Windscreen is arranged.
  • the camera is from one on the inside of the
  • Windshield attached bracket added.
  • the holder forms according to this solution, a cap, which encloses the space between the windshield 10 and a camera lens light and dustproof, wherein the camera is arranged on the windshield applied to the end of the cap.
  • Cover has a bordered by a peripheral edge light entrance window and lies with the peripheral edge of the windshield so that the
  • a camera device is known.
  • this camera device is one that is suitable for a portable electrical device.
  • the camera apparatus includes an electronic camera element for receiving light emitted from a light source.
  • An optical element is also provided for breaking the light emitted by the light source, wherein the optical element is arranged between the electronic camera element and the light source.
  • an absorption element is provided which is arranged between the electronic camera element and the light source in order to control the intensity of the light impinging on the camera element.
  • the absorption element is according to DE 102 52
  • stray light apertures have for masking reflected lateral light on the inside of a staircase-like structure. Reflected side light is reflected back to the outside by the structure formed on the inside of the lens hood.
  • An optimization of the parameters with regard to the height of the steps of the staircase-like structure, the step step widths and the angle between vertical and horizontal surface largely reduces the scattered light. Furthermore, the inside of the lens hood is kept in a strongly absorbing black color.
  • Light traps could be represented by small pits, in which the light is reflected back and forth until it has lost its intensity through absorption at the surfaces.
  • a complex production is required, with would involve a disproportionate effort, which relates to the production of such small structures in the form of holes on the individual stages of provided on the inside of the lens hood stair structure.
  • the secondary stair-like structure could also be formed of small sloping ramps, which are placed one behind the other on the already existing steps of the primary, already existing staircase-like structure.
  • incident light from above such as e.g. Sunlight or the light of one
  • FIG. 1 shows a schematic representation of the starting situation with a scattered-light diaphragm arranged in front of a camera
  • Figure 2 is a cross-section through a known from the prior art
  • FIG. 3 shows light incident from above on the scattered-light diaphragm according to FIG.
  • FIG. 4 shows the reflection conditions of incident light at the top
  • FIG. 5 shows a secondary staircase-like structure superimposed on the staircase-type structure according to the invention
  • FIG. 6 shows the beam path from above incident light on a primary staircase-like structure on the inside of the lens hood
  • FIG. 7 shows the beam path from above incident light on the inside of a scattered light diaphragm, which, in addition to the primary staircase-like structure, has the further secondary staircase-like structure proposed according to the invention
  • Figure 8 shows the representation of a primary structure with different from 0 ° and 90 °
  • step 9 shows the illustration of a step-shaped staircase-shaped primary structure, which comprises more than two elements and has a bevelled edge
  • FIG. 10 shows the representation of a stepped primary structure in which the steps of the stairs are provided with angles other than 0 ° and 90 ° and with a bevelled edge
  • Figure 11 shows the representation of a ramp-shaped secondary structure, which is superimposed on the staircase-shaped primary structure and is designed axially symmetrical to the optical axis.
  • Figure 1 shows a schematic representation of the currently prevailing beam paths on a camera received on the inside of a windshield.
  • FIG. 1 reveals that a scattered-light diaphragm 12 is connected upstream of a camera module 10.
  • the scattered light diaphragm 12 abuts against an inner side 16 of an inclined windshield 14.
  • the outside of the windshield 14 is identified by reference numeral 18.
  • the X-axis is identified by reference numeral 20.
  • the X-axis 20 represents the optical axis of the camera 10.
  • Reference numeral 22 identifies the Z-axis, ie in the present case the vertical axis.
  • the scattered light diaphragm 12 comprises an outer side 30 and an inner side 28. Light incident directly on the outer side 30 of the scattered light diaphragm 12 is masked out, represented by the arrow 26. By the windshield 14 from the outside 18 to the inside 16 by passing indirect light 32, the scattered light aperture 12 is reflected on the inside 28 and falls into an objective 52 of the camera module 10 a.
  • FIG. 2 shows a primary stepped structure formed on the inside of the scattered light diaphragm.
  • the inside of the scattered light diaphragm 12 is reproduced on an enlarged scale.
  • the known from the prior art diffuser panel 12 comprises a primary staircase-like structure 34, which on the inside
  • the outer side 30 of the scattered light diaphragm 12 extends in accordance with the inclination of the scattered light diaphragm 12 in order to bridge the distance between the objective 52 of the camera module 10 and the inner side 16 of the windscreen 14, not shown in FIG.
  • the primary staircase-like structure 34 comprises individual stages 48.
  • a light beam 32, 36 incident into the lens hood 12 is reflected from the top of a corresponding step 48 to the front of the further step of the primary staircase-like structure 34 adjoining the step 48 and from this again emitted as reflected light 38.
  • the light beam 38 thus represents reflected indirect light 32, 36 which does not enter the objective 52 of the camera module 10.
  • FIG. 3 shows the beam path of light incident from above, which is incident on the scattered light diaphragm 12 and reflected into the camera module 10.
  • top-incident light 40 as shown in Figure 3, e.g. Sun rays or the light of street lamps or other sources of light meant. From above incident light 40 hits the inside 28 of the lens hood
  • the inner side 28 of the scattered light diaphragm 12 is provided with a primary staircase-like structure 34, which, however, is not shown in FIG. 3 for purposes of illustration.
  • a primary staircase-like structure 34 having inner side 28 of the lens hood 12 is reflected from above incident light 40 corresponding to the arrow 42 to the inside 16 of the windshield 14. From the inner side 16 of the windshield 14, the reflected light 42 is guided according to the beam path 44, 46, in the lens 52, which is connected upstream of the camera module 10.
  • Lens aperture 12 incident light 40 reproduced on an enlarged scale. From the illustration according to FIG. 4, it can be seen that light 40 incident from above is guided by the steps 48 of the primary staircase-like structure 34 according to the arrow 42 to the inside of the windshield, which is not shown in the illustration according to FIG. At a correspondingly unfavorable angle of incidence of the incident light from above 40, the primary staircase-like structure 34 is ineffective; According to the beam path shown in FIG. 3, incident light 40, after reflection on the inner side 16 of the windshield 14, is guided directly into the objective 52 upstream of the camera module 10 and thus falls directly into it, thus considerably disturbing the image recording quality of the camera module 10
  • each step 48 has a sharp edge 50.
  • the straylight 12 is a U-shaped structure whose open side is covered by the windshield 14. At the two opposite legs of the U-shaped stray light aperture, the primary ramp-shaped structures are formed; further in the bottom of the U-shaped profiled structure.
  • FIG. 5 shows a scattered-light diaphragm designed according to the invention.
  • the scattered light diaphragm 12 comprises on the inner side 28 the primary staircase-like structure 34.
  • This has individual steps 48, which each have a flat surface 58 and an end face 70. Further, the steps 48 include an edge 50 where the flat surface 58 and the end face 70 meet.
  • the primary staircase-like structure 34 is located on the inner side 28 of the lens hood 12, while the outer side 30 is substantially straight, see. Representations according to Figures 2 and 4.
  • the secondary ramped Structure 56 includes individual ramped elevations.
  • the individual ramped bumps include a deflecting surface 82 inclined with respect to the flat surface 58 of the primary staircase structure 34 which is inclined by a pitch angle 84 with respect to the flat surface 58 of the step 48.
  • the deflection surface 82 is bounded by an end face 66.
  • the secondary ramp-shaped structure 56 superimposed on the primary staircase-like structure 34 is arranged so that the deflecting surfaces 82 are designed to be inclined towards the outside of the scattered-light diaphragm 12.
  • the secondary ramped structure 56 comprises a plurality of ramp-shaped elevations.
  • the sequence of individual ridges formed is orthogonal to the X-axis 20, i. parallel to the Y-axis 54.
  • Top-incident light 40 and 62 impinge on the deflection surfaces 82 of the secondary ramp-shaped structure 56 and are reflected according to the lead angle 84 as indicated by the arrow 64.
  • the reflected light 64 is impressed on a component extending in the direction of the Y-axis 54.
  • the light 64 reflected by the secondary ramped structure 56 is reflected and absorbed at a side surface of the scattered light orifice 12 and reflected to the opposite side surface of the scattered light orifice and so on.
  • Deflection surface 82 of end face 66 and lead angle 84 provide new structural parameters, e.g. Inclination and height of the individual ramp-shaped elevations and the number of ramps, through the optimization of which a strong reduction of incident light scattering light 40, 62 can be achieved.
  • the ramped elevations of the secondary ramped structure 56 include perpendicular end faces 66 and deflection surfaces 82 oriented in pitch angle 84. Thereby, new structural parameters e.g. in terms of the pitch angle 84 of the deflection surface 82 as well as the height of the end face 66 and the number of ramp-shaped elevations per stage 48 given.
  • the secondary ramp-shaped structure 56 could be formed axially symmetrically with respect to the optical axis 20, which coincides with the X-axis, to the center of each step 48 of the primary staircase-like structure 34. This means that not all ramped elevations of a secondary ramp-shaped structure 56 on the flat surface 48 to one side of the
  • Lens aperture 12 show, but each to the nearer edge of the lens hood 12th
  • FIG. 6 shows the beam path from above incident light in a camera lens.
  • FIG. 6 shows that light 40, 62 incident on the flat surface 58 of the step 48 is reflected from above approximately vertically or vertically.
  • the steps 48 are divided by edges 50 in the flat surface 58 and the end face 70.
  • On the flat surface 58 incident light 40, 42 is reflected according to the reflected light 42 at an impact location 72 on the inside of a windshield 14, not shown in Figure 6 and falls as reflected light 44, 62 directly into the lens 52, which the camera module 10th upstream.
  • the primary staircase-like structure 34 is incorporated in the inside 28 of the lens hood 12.
  • FIG. 7 shows the secondary ramp-shaped structure applied according to the invention to the inside of the scattered-light diaphragm on the primary staircase-like structure 34 formed there.
  • FIG. 7 shows a further, secondary ramp-shaped structure 80 as well as a third secondary ramp-shaped structure 86 which are respectively applied to the flat surfaces 58 of the individual steps 48 of the primary staircase-like structure 34.
  • the end faces of the individual ramped elevations are indicated by reference numeral 66, while the deflecting surfaces are indicated by the reference numeral 82.
  • the Z-axis is designated by reference numeral 22, the X-axis by reference numeral 20 and the Y-axis by reference numeral 54.
  • the X-axis 20 coincides with the optical axis of the
  • a beam 40, 62 perpendicularly incident from above is inclinedly reflected at the deflecting surface 82.
  • the reflected light 64 arrives at a modified impact location 74 on the inside 16 of the windshield 14 and is reflected therefrom past the camera lens 52 as a deflected beam according to reference numeral 78. Accordingly, light 40, 62 incident from above can not adversely affect the image-recording quality of the camera lens 52 or of the camera module 10 subordinate thereto, since the rays incident from above
  • the illustration according to FIG. 8 shows a primary structure which has a stepped shape.
  • the primary structure 34 comprises each vertically formed
  • End faces 70 and flat surfaces 58 which abut one another along an edge 50.
  • each stages 48 are formed.
  • the flat surfaces 58 extend at an inclination angle ⁇ different from 0, i.e., 0. the flat surfaces 58 are formed inclined either upwardly or downwardly with respect to the edges 50 of the individual steps 58.
  • the end faces 70 of the individual stages are formed.
  • Angle range between 80 ° and 110 ° are designed to extend.
  • FIG. 9 shows a further configuration possibility of the primary structure.
  • this comprises both planar surfaces 58 and end sides 70, which, however, do not abut against one another along a common edge 50, but rather via an obliquely running one
  • step 48 is oriented, for example in the order of between 20 ° and 30 °.
  • FIG. 10 shows a further possible embodiment for a primary staircase-shaped structure.
  • the primary structure 34 as shown in FIG. 10 represents a combination of the features of the embodiment variants according to FIGS. 8 and 9.
  • the flat surface 58 is connected to the end face 70 of a step 48 via an inclined surface 88 .
  • the angle of inclination about which the inclined surface 88 is oriented relative to the flat surface 58 is advantageously on the order of between 20 ° and 30 °.
  • the flat surface 58 is inclined at an angle ⁇ with respect to the X-axis 20.
  • the flat surface 58 extends at an angle of a few
  • the illustration according to FIG. 10 can be taken away from the fact that the end face 70 is inclined at an angle ⁇ , not equal to 90 °, relative to the vertical.
  • FIG. 11 shows a further embodiment of the primary structure 34, which is superimposed on two secondary ramp-shaped structures 56 oriented in opposite directions.
  • Two oppositely extending secondary ramp-shaped structures 56 each have a plurality of ramp-shaped elevations, each comprising the deflection surface 82.
  • the deflecting surfaces 82 are oriented such that reflected light 64 deflected therefrom meets the two spaced-apart, vertically extending legs of the U-shaped stray light stop 12.
  • Each of the baffles 82 of the secondary ramp-shaped structure 56 is inclined by the angle of inclination 85 and includes an end face 66.
  • the secondary ramped structures 56 which are oriented counter to one another, are located on a flat surface 58 of a step 48 of the primary structure 34. It is, of course, possible for the secondary ramped structures 56 adjoining each other on a central axis 90 in the illustration according to FIG to arrange an angle ⁇ inclined flat surfaces 58 to influence the reflection of incident light in the lens hood 12 light.
  • the end faces 70 of the steps 48 are arranged vertically, but they could, as explained above in connection with FIGS. 9 and 10, be oriented by the angle of inclination ⁇ deviating from the vertical in order to improve the reflection properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Studio Devices (AREA)
  • Blocking Light For Cameras (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne un module de caméra (10) comportant un diaphragme de protection contre la lumière diffusée (12), monté en amont d'un objectif (52) du module de caméra (10). Ledit diaphragme (12) est situé sur le côté intérieur (16) d'un disque (14) et présente, sur son côté intérieur (28), une structure (34) réduisant l'incidence de lumière diffusée (32, 36). La structure (34) réduisant l'incidence de lumière diffusée (32, 36) comporte au moins une structure secondaire en forme de rampe (56, 80, 86), orientée de façon orthogonale par rapport à l'axe optique (20) du module de caméra (10).
EP05803057A 2004-12-06 2005-11-11 Diaphragme de protection contre la lumiere diffusee dans une camera Withdrawn EP1825668A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004058683A DE102004058683A1 (de) 2004-12-06 2004-12-06 Streulichtblende zur Reduzierung des in eine Kamera fallenden Streulichts
PCT/EP2005/055922 WO2006061304A1 (fr) 2004-12-06 2005-11-11 Diaphragme de protection contre la lumiere diffusee dans une camera

Publications (1)

Publication Number Publication Date
EP1825668A1 true EP1825668A1 (fr) 2007-08-29

Family

ID=35517640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05803057A Withdrawn EP1825668A1 (fr) 2004-12-06 2005-11-11 Diaphragme de protection contre la lumiere diffusee dans une camera

Country Status (6)

Country Link
US (1) US20090122138A1 (fr)
EP (1) EP1825668A1 (fr)
JP (1) JP2008522891A (fr)
CN (1) CN101073252A (fr)
DE (1) DE102004058683A1 (fr)
WO (1) WO2006061304A1 (fr)

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CN103698961A (zh) * 2014-01-14 2014-04-02 哈尔滨信斯宁科技开发有限公司 一种单反数码相机镜头用遮光罩
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DE102015214189A1 (de) * 2015-07-27 2017-02-02 Robert Bosch Gmbh Streulichtfalle für eine Kamera einer mobilen Einheit
EP3408138B1 (fr) * 2016-01-29 2022-11-23 Gentex Corporation Optique d'indicateur pour module d'éclairage de véhicule
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JP6673072B2 (ja) * 2016-07-19 2020-03-25 株式会社デンソー 車両用カメラ装置
DE102016113945A1 (de) * 2016-07-28 2018-02-01 Valeo Schalter Und Sensoren Gmbh Projektionsvorrichtung für ein Kraftfahrzeug mit spezifischer Anti-Reflexionsstruktur an Schachtwänden sowie Kraftfahrzeug mit einer Projektionsvorrichtung
CN107016748A (zh) * 2017-05-10 2017-08-04 寅家电子科技（上海）有限公司 行车记录仪
KR101916778B1 (ko) * 2017-07-28 2018-11-08 현대오트론 주식회사 차량용 카메라 장치
CN108594263A (zh) * 2018-01-30 2018-09-28 北醒（北京）光子科技有限公司 一种激光雷达及无人驾驶系统
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CN109004973B (zh) * 2018-07-04 2021-09-07 广州广电计量检测股份有限公司 一种otdr性能评估装置及方法
DE102018213820A1 (de) * 2018-08-16 2020-02-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer Blickfeldanzeigevorrichtung für ein Kraftfahrzeug
JP7048479B2 (ja) * 2018-12-18 2022-04-05 本田技研工業株式会社 輸送機器およびセンサブラケット
GB201904203D0 (en) 2019-03-26 2019-05-08 Pikington Group Ltd Laminated glazing and process
DE102019134006A1 (de) * 2019-12-11 2021-06-17 Bayerische Motoren Werke Aktiengesellschaft Streulichtblende für eine Fahrzeugkamera
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Also Published As

Publication number Publication date
CN101073252A (zh) 2007-11-14
JP2008522891A (ja) 2008-07-03
US20090122138A1 (en) 2009-05-14
DE102004058683A1 (de) 2006-06-14
WO2006061304A1 (fr) 2006-06-15

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