WO2007111317A1 - 暗視装置 - Google Patents
暗視装置 Download PDFInfo
- Publication number
- WO2007111317A1 WO2007111317A1 PCT/JP2007/056266 JP2007056266W WO2007111317A1 WO 2007111317 A1 WO2007111317 A1 WO 2007111317A1 JP 2007056266 W JP2007056266 W JP 2007056266W WO 2007111317 A1 WO2007111317 A1 WO 2007111317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- optical band
- night
- peaks
- band elimination
- 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.)
- Ceased
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
Definitions
- the present invention relates to a night vision device, and more particularly to a night vision device suitable as an in-vehicle night vision device that uses light ranging from a visible light region to an infrared light region to improve visibility at night and the like.
- a lighting device such as a headlamp that emits visible light and infrared light toward the traveling direction such as in front of the host vehicle.
- In-vehicle night vision devices are known in which reflected light from a subject is imaged by an image sensor of a camera and the image is displayed on a monitor in the vehicle.
- a light source that emits light having a wavelength ranging from the ultraviolet region to the infrared light region is used to absorb light in the visible light region of 380 nm to 780 nm using two filters.
- the infrared transmitted light can be displayed in a reddish image, and the driver of the oncoming vehicle can feel the night view or bad weather without feeling dazzled It is described that the expansion is intended. Further, in Japanese Patent Laid-Open No.
- the halation in the image is reduced by performing data processing for reducing the luminance of the high-luminance portion that causes halation so that the halation from the high-luminance light source does not occur.
- a method of making it easier to see obstacles such as pedestrians hidden behind the halation by reducing the number is disclosed.
- the peak wavelength of the light source that causes halation is visible light as shown in FIGS. 4A and 4B. Since it exists over the entire area, it results in lowering the brightness over the entire visible light area, and it is difficult to say that obstacles and white lines around the vehicle can be sufficiently confirmed.
- the present invention has been made to solve the above problems, and can broaden the field of view in the evening or in bad weather, receives light from the visible light region to the infrared light region, and from the distance to the vicinity of the device
- An object of the present invention is to provide a night vision device capable of obtaining highly sensitive images over a wide range.
- the present invention comprises an illuminating device comprising one or two or more light sources, and having a plurality of peaks in the wavelength spectrum of the visible light region and emitting light up to a visible light region force infrared region, and the illuminator force light emission
- An imaging camera that receives the received light
- a night vision apparatus wherein an output image is obtained from an image captured by the imaging camera through the optical band elimination filter.
- the optical band elimination filter cuts only the peak having the highest intensity and the peak having the second highest intensity among the three or more peaks.
- the optical band elimination filter has a light shielding band power of a wavelength range of 490 to 570 nm, or a wavelength range of 530 to 610 nm and a half value of the shielding rate. It is desirable.
- the light-shielding bandwidth of the optical band elimination filter is 50 ⁇ :! OOnm. Furthermore, it is desirable that the optical band elimination filter has two light-shielding bands with different cut-off wavelengths, which are wavelengths at which the shielding rate becomes half value.
- the present invention is a night vision device-equipped vehicle equipped with the night vision device described above.
- the present invention is a night-vision-equipped small ship equipped with the above-described night-vision device.
- an optical band eliminator that cuts only some of the plurality of peaks in the visible light region with respect to the illumination device that emits light from the visible light region to the infrared light region.
- the peak sensitivity in the infrared light region is balanced while ensuring peak sensitivity in the visible light region, and the far-field image based on the peak intensity in the infrared light region and the peak intensity in the visible light region are used. Both images near the device can be obtained with high sensitivity.
- halation is not generated in the night vision device due to visible light emitted from the outside such as a low beam of an oncoming vehicle.
- the vicinity of the vehicle equipped with the night vision device of the present invention It is also possible to prevent obstacles such as pedestrians that are present in the area from being difficult to see. Accordingly, since the output image necessary for displaying on the image display section becomes clearer over the distance near the device, the field of view of the night vision device is expanded.
- the light in the visible light region emitted from the low beam received by the imaging camera tends to have a higher peak intensity because the object is closer to the vehicle than the light in the infrared light region.
- the light receiving intensity of light from the infrared light source tends to be low.
- looking at the details of the wavelength spectrum of the light emitted from the low-beam light source of the headlamp there are several high-intensity peaks over the entire wavelength in the visible light region, and these peak intensities depend on the peak intensity. It can be seen that the vehicle surrounding information can be obtained.
- the peak intensity of the wavelength at which the peak exists is not reduced or cut, and the high-intensity causes the high-intensity to increase the image peak intensity.
- the peak intensity of the wavelength where the peaks exist is reduced or cut to balance the image sensitivity in the visible light region and the image sensitivity in the infrared light region. It is possible to clearly confirm information in a wide area extending from the periphery of the vehicle.
- the optical band elimination filter cuts only the peak having the highest intensity among the three or more peaks, or the three or more peaks. Only the peak with the highest intensity and the peak with the second highest intensity can be balanced with the image intensity in the infrared region while maintaining the image sensitivity in the visible region. Desire les.
- the optical band elimination filter has a light shielding band power of 490 to 570 nm, a wavelength range of 490 to 570 nm, or a wavelength range of 530 to 610 nm and a half value of the shielding rate. This is desirable in that the image intensity in the infrared region can be achieved while maintaining the sensitivity in the visible region.
- the light-shielding bandwidth of the optical band elimination filter is 50 to 100 nm.
- the sensitivity is not reduced in the visible light region.
- the optical band elimination filter has two light shielding bands having different cutoff wavelengths, which are wavelengths at which the shielding rate becomes half value, it is possible to cut the peak in the two light shielding bands.
- the image information obtained by the night vision device can be directly viewed by the driver, or the driver can see, for example, an obstacle on the road or another vehicle.
- the detection can be warned with sound, light or vibration, and the behavior of the vehicle can be controlled based on image information obtained by the night vision device.
- the night vision device of the present invention by mounting the night vision device of the present invention on a small ship, the image information obtained by the night vision device can be directly seen by the operator, or the operator can obstruct obstacles such as a reef and other ships. It can warn by sound, light, or vibration that a ship or other small ship has been detected.
- FIG. 1A is a schematic front view of a vehicle equipped with a night vision device for a vehicle which is a preferred example of the night vision device of the present invention
- FIG. 1B is a schematic side view of a vehicle equipped with the night vision device for a vehicle.
- Fig. 2 is a block circuit diagram of the vehicle night vision device mounted on the vehicle of Figs. 1A and 1B. It is.
- FIG. 3A is a sectional view showing an example of an infrared illumination light source according to the present invention
- FIG. 3B is an exploded perspective view.
- FIG. 4A is a wavelength spectrum showing the emission characteristics of one HID lamp
- FIG. 4B is a wavelength spectrum showing the emission characteristics of another HID lamp.
- FIG. 5 is a wavelength spectrum showing an example of the transmission characteristics of the optical band elimination filter.
- Fig. 6A shows the wavelength spectrum of the corrected light obtained by passing the light of the HID lamp of Fig. 4A through the optical band elimination filter having the transmission characteristics of Fig. 5
- Fig. 6B shows the light of the HID lamp of Fig. 4B.
- 5 is a wavelength spectrum of corrected light obtained through an optical band elimination filter having a transmission characteristic of 5.
- FIG. 1A and 1B show an example of a vehicle 1 equipped with a night-vision device for a vehicle which is a preferred example of the night-vision device according to the present invention
- FIG. 1A is a schematic front view
- FIG. It is a side view.
- a headlamp 2 is provided at the front portion of the vehicle 1 as a lighting device.
- the headlamp 2 is composed of a high beam light source 2A, a low beam light source 2B, and an infrared light source 2C, and the infrared light source 2C is provided in the center of the vehicle.
- an imaging camera 3 having sensitivity from the visible light region to the infrared light region is provided in the rearview mirror portion in front of the driver's seat inside the vehicle 1. . That is, the imaging camera 3 detects light in a range from the visible light region to the infrared light region.
- a controller 4 is provided inside the vehicle. As shown in FIG. 2, the controller 4 is input with a vehicle speed signal from the vehicle speed sensor 5 and a steering angle signal from the steering angle sensor 6, and an imaging camera. The image signal is input from 3.
- the controller 4 has an image processing unit 7, which processes the image signal from the imaging camera 3, and displays it on a display 8 that is an image display unit installed in front of the driver's seat inside the vehicle 1. Output, and an image based on the image captured by the imaging camera 3 is displayed on the display 8. Is displayed.
- the controller 4 has a function of changing the direction of the imaging camera 3 by a vehicle speed signal from the vehicle speed sensor 5 and a signal from the rudder angle sensor 6, and for example, when an obstacle such as a pedestrian is present in the front A signal can be appropriately sent to the warning notification means such as the speaker 9 or the indicator 10.
- FIG. 2 an example in which the output image is output to the display 8 that is an image display unit is described.
- the present invention is not limited to the above example, and the output image is not limited to the image display unit. It can be output to a system, output to a recording device installed in a vehicle, or transmitted to a communication system such as a navigation system.
- 3A is a schematic perspective view
- FIG. 3B is a cross-sectional view taken along the line AA in FIG. 3A.
- the imaging camera 3 mainly uses a lens member 12 (first 1st) for collecting subject light.
- the lens member 12 and the imaging substrate 14 are overlapped with a predetermined gap and fixed by a fixing pin 18, and the first lens 12a is placed on the surface of the lens holding portion 15a of the front case 15 on the object side. It also comes into contact with the constituent force restrained by the retainer 23 from the subject side.
- the retainer 23 is fixed to the side surface of the lens holding portion 15a by, for example, an adhesive or solder.
- the second lens 12b and the third lens 12c are press-fitted into an opening 15b that opens to the lens holding portion 15a, and are fixed by, for example, an adhesive or solder.
- a mask or a diaphragm may be provided at an appropriate position of the lens member 12, or the outer periphery of the first lens 12a may be fixed by the lens holding portion 15a like the second lens 12b.
- the image pickup device 13 is constituted by, for example, a CCD (charge coupled device) image sensor or a CMOS (complementary M0S) image sensor (complementary MOS image sensor).
- the image sensor 13 is housed in a cavity 24 a of the sub-board 24 and is sealed with a glass lid 25.
- electronic components such as ICs, capacitors, coils, and resistors for processing electrical signals from the imaging device 13, and the imaging board 14 and ECU (not shown)
- a connector (not shown) or the like for connecting a cable (not shown) for connecting to the cable is provided. Furthermore, the cable connected to the connector (not shown) is inserted into and fixed to the back side case member (not shown). It is connected to a connector and further led out to an external cable.
- the optical band elimination filter 30 is disposed between the lens member 12 and the imaging substrate 14 of the imaging camera 3.
- the optical band elimination filter 30 is formed between the lens member 12 and the imaging substrate 14.
- the present invention is not limited to this, and the first lens is not limited thereto.
- the outer periphery of 12a may be formed between the lenses such as the second lens 12b, or may be disposed in front of the lens member 12.
- the optical band elimination filter 30 is formed by forming a filter layer on one main surface of a flat plate made of glass.
- the glass materials used for the flat plate are 10% silica and 10 boron oxide. /.
- a borosilicate glass containing 2% barium oxide, 2% antimony oxide, 2% titanium oxide, and 20% zinc oxide can be used.
- One layer of aluminum oxide (thickness 58 nm) is formed on one main surface of this borosilicate glass flat plate, and five layers of titanium oxide (thickness 83 nm) and silica (thickness 130 nm) are alternately formed.
- An optical band elimination filter is formed by forming one layer (thickness 83 nm) and one layer of aluminum oxide (thickness 58 nm).
- This optical band elimination filter has an optical characteristic in which the center wavelength is 570 nm and the cutoff wavelengths at both ends are 530 nm and 61 Onm, respectively, where the cutoff wavelength is the wavelength at which the shielding ratio is half value at both ends of the light shielding band. It will have.
- the configuration of the optical band elimination filter described above is a force that forms a filter layer only on one main surface of the flat plate.
- the filter layer is not limited to such a configuration, and the filter layer is formed on both main surfaces of the flat plate. May be formed.
- the filter layer formed on one main surface is configured to have a light shielding band with cutoff wavelengths of 530 nm and 580 nm, and the filter layer formed on the other main surface has a cutoff wavelength of 560 nm.
- 610 nm shading band so that the cut-off wavelength at both ends is 530 nm and 610 nm before the light passes from one main surface to the other main surface.
- optical band elimination filter having Further, the optical band elimination filter can be configured by forming a filter layer on the main surface of the first lens 12a, the second lens 12b, or the third lens 12c.
- the optical band elimination filter can also be configured by forming a filter layer on the main surface of the glass lid 25 attached to the upper surface of the sub-substrate 24 so as to seal the imaging device 13.
- it may be configured by forming a filter layer on the surface of a microlens (not shown) on the surface of the image sensor 13.
- FIGS. 4A and 4B an example of the spectrum of light emitted from the headlamp 2 and received by the imaging camera 3 is shown in FIGS. 4A and 4B.
- the imaging camera 3 has a plurality of peaks mainly in the visible light region of 380 to 780 nm, and a low-beam light source 2B for obtaining information on the periphery of the vehicle such as white line recognition.
- the infrared light source 2C has a peak in the infrared region of 780 nm or more and is invisible at night, and is emitted from the light source 2C to the target. Both the reflected light spectrum and the reflected light are received.
- the intensity of the reflected light received by the imaging camera 3 is not determined solely by the intensity of the light emitted from the light source. Is weaker as the distance between the light source and the object becomes longer. Therefore, the light from the infrared light source 2C for viewing a distant object tends to be less sensitive than the light from the low beam light source 2B for viewing an object around the host vehicle.
- FIG. 4A and FIG. 4B receive both the spectrum of the high-pressure discharge lamp (HID illumination light source) used as the low-beam light source 2B and the spectrum of the halogen lamp used as the infrared light source 2C.
- the light of the HID illumination light source has a different waveform depending on the type.
- Fig. 4A is an example of a metal halide lamp, and there are 8 peaks in the visible light region
- Fig. 4B is an example of a mercury lamp, and there are 4 peaks in the visible light region.
- the optical band elimination filter 30 is provided between the lens member 12 and the image sensor 13.
- FIG. 5 illustrates an example of the transmission characteristics of the optical band elimination filter 30.
- the optical band elimination filter 30 in FIG. 5 has a shielding factor half-value d in the shielding band 530 to 610 nm.
- the optical band elimination filter 30 when the optical band elimination filter 30 is not used or when no peak can be cut, the image intensity of the apparatus peripheral information based on the light emitted from the low beam light source 2B is increased, and the relative The image of distant information based on the light emitted from the infrared light source 2C becomes visible. Conversely, if all peaks in the visible light region are cut by the filter, it will not be possible to detect obstacles and recognize white lines around the vehicle displayed based on the signal in the visible light region. End up.
- the optical band elimination filter 30 when there are five or more peaks in the wavelength spectrum of the headlamp 2, the optical band elimination filter 30 has the highest intensity among these five or more peaks.
- the ability to cut only the two peaks with the second highest intensity is desirable because it can be reduced to match the intensity in the infrared region while maintaining the sensitivity in the visible region.
- the shielding band power of the optical band elimination filter 30 has a half-value d of the shielding ratio in the wavelength range of 490 to 570 nm or in the wavelength range of 530 to 610 nm. This is desirable because it can effectively balance the image intensity in the infrared light region while maintaining the sensitivity in the visible light region. Further, it is desirable that the light-shielding bandwidth of the optical band elimination filter 30 is 50 to 100 nm in terms of enhancing the sensitivity of the image in the visible light region.
- the infrared light source 2C is provided as a dedicated light source separate from the low beam light source 2B.
- the infrared light source 2C can also be used as the low beam light source 2B.
- the shape of the filter of the infrared light source 2C is not limited to this.
- the night-vision device of the present invention can be suitably applied to surveillance cameras and the like that are not limited to vehicle night-vision devices.
- the night vision device of the present invention can be mounted on a vehicle.
- the night vision device-equipped vehicle of the present invention like a conventional night vision device-equipped vehicle, allows the driver to directly view the image information obtained by the night vision device, or allows the driver, for example, It is possible to warn that another vehicle has been detected by sound, light or vibration, and to control the movement of the vehicle based on image information obtained by the night vision device.
- the night vision device-equipped vehicle of the present invention specifically includes passenger cars such as trains, trains, automobiles, and vehicles for transporting cargo, bicycles, motorbikes, amusement park vehicles, golf This can be realized by mounting the night vision device of the present invention on a vehicle such as a cart in the field.
- the night vision device of the present invention can be mounted on a small vessel.
- the night-vision-equipped small boat of the present invention allows the pilot to directly view the image information obtained by the night-vision device, or allows the pilot to obstruct obstacles such as dark reefs, and other vessels. Or it can warn that it has detected other small vessels by sound, light or vibration.
- the night-vision-equipped small vessel of the present invention is specifically a vessel that can be operated without a license or license of a small vessel, and is a rowing boat, dinghy, Water motorcycles, small bass boats with outboard motors, inflatable boats (rubber boats) with outboard motors, fishing boats, recreational fishing boats, work boats, houseboats, towing boats, sports boats, fishing boats, yachts, open-sea yachts,
- a small vessel such as a cruiser or a pleasure boat having a total tonnage of 20 tons or more.
- a vehicle that has a headlamp light source with the light emission characteristics shown in Fig. 6A and Fig. 6B and an optical band elimination filter with the shading band shown in Table 1 installed in the imaging camera. It was set so that a person with white clothes standing as an obstacle was standing near the white line. And light for low beam of own car When both the light source and the infrared light source are lit, an oncoming vehicle with the headlight turned on and placed in the front position 150m away from this vehicle is seated in the driver's seat of this vehicle and Judgment was made as to whether or not the person wearing white clothes could be confirmed by observing on the display of the visual device.
- Sample Nos. 2 to 7 provided with an optical band elimination filter that blocks only a part of the plurality of peaks can recognize obstacles and are white. Line recognition was also possible.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Closed-Circuit Television Systems (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07739704.0A EP2007132B1 (en) | 2006-03-28 | 2007-03-26 | Night vision device |
| JP2008507497A JP4594423B2 (ja) | 2006-03-28 | 2007-03-26 | 暗視装置 |
| US12/294,606 US7767964B2 (en) | 2006-03-28 | 2007-03-26 | Night vision apparatus |
| CN2007800110067A CN101411178B (zh) | 2006-03-28 | 2007-03-26 | 暗视装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-087805 | 2006-03-28 | ||
| JP2006087805 | 2006-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007111317A1 true WO2007111317A1 (ja) | 2007-10-04 |
Family
ID=38541234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/056266 Ceased WO2007111317A1 (ja) | 2006-03-28 | 2007-03-26 | 暗視装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7767964B2 (ja) |
| EP (1) | EP2007132B1 (ja) |
| JP (1) | JP4594423B2 (ja) |
| CN (1) | CN101411178B (ja) |
| WO (1) | WO2007111317A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785990A (zh) * | 2016-02-26 | 2016-07-20 | 江苏科技大学 | 基于全景环视的船只停泊系统及障碍物识别方法 |
| JP2017083443A (ja) * | 2015-10-26 | 2017-05-18 | センサーズ・アンリミテッド・インコーポレーテッド | 量子効率(qe)が制限された赤外線焦点面アレイ |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110140010A (ko) * | 2010-06-24 | 2011-12-30 | 삼성전자주식회사 | 근적외광 신호를 이용한 이미지 센서 |
| JP5921112B2 (ja) * | 2010-08-20 | 2016-05-24 | 株式会社日立国際電気 | 画像監視システムおよびカメラ |
| CN103460403A (zh) * | 2011-02-28 | 2013-12-18 | 佛罗里达大学研究基金会有限公司 | 用于上转换器件的红外线透过的可见光阻挡器 |
| US20130083195A1 (en) * | 2011-09-30 | 2013-04-04 | Jeffrey Thomas Remillard | Polarization-based anti-blinding night vision system, vehicle comprising same, and method therefor |
| JP6205923B2 (ja) * | 2013-07-11 | 2017-10-04 | 株式会社デンソー | 走行支援装置 |
| DE102014115292A1 (de) * | 2014-10-21 | 2016-04-21 | Connaught Electronics Ltd. | Verfahren zum Bereitstellen von Bilddateien von einem Kamerasystem, Kamerasystem und Kraftfahrzeug |
| DE102015005697B4 (de) * | 2015-05-04 | 2019-10-02 | Mekra Lang Gmbh & Co. Kg | Kamerasystem für ein Kraftfahrzeug |
| CN105799593B (zh) * | 2016-03-18 | 2019-01-25 | 京东方科技集团股份有限公司 | 车辆辅助行驶装置 |
| JP6181278B1 (ja) * | 2016-12-22 | 2017-08-16 | Jig−Saw株式会社 | 可視光波長変換部を有する頭部装着型映像提示装置 |
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2007
- 2007-03-26 WO PCT/JP2007/056266 patent/WO2007111317A1/ja not_active Ceased
- 2007-03-26 US US12/294,606 patent/US7767964B2/en not_active Expired - Fee Related
- 2007-03-26 CN CN2007800110067A patent/CN101411178B/zh not_active Expired - Fee Related
- 2007-03-26 JP JP2008507497A patent/JP4594423B2/ja not_active Expired - Fee Related
- 2007-03-26 EP EP07739704.0A patent/EP2007132B1/en not_active Ceased
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017083443A (ja) * | 2015-10-26 | 2017-05-18 | センサーズ・アンリミテッド・インコーポレーテッド | 量子効率(qe)が制限された赤外線焦点面アレイ |
| CN105785990A (zh) * | 2016-02-26 | 2016-07-20 | 江苏科技大学 | 基于全景环视的船只停泊系统及障碍物识别方法 |
| CN105785990B (zh) * | 2016-02-26 | 2019-01-11 | 江苏科技大学 | 基于全景环视的船只停泊系统及障碍物识别方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4594423B2 (ja) | 2010-12-08 |
| CN101411178B (zh) | 2011-10-05 |
| JPWO2007111317A1 (ja) | 2009-08-13 |
| EP2007132B1 (en) | 2013-05-08 |
| US7767964B2 (en) | 2010-08-03 |
| EP2007132A4 (en) | 2009-05-13 |
| CN101411178A (zh) | 2009-04-15 |
| EP2007132A1 (en) | 2008-12-24 |
| US20090101820A1 (en) | 2009-04-23 |
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