WO2002090148A1 - Camera-built-in mirror device - Google Patents

Camera-built-in mirror device Download PDF

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Publication number
WO2002090148A1
WO2002090148A1 PCT/JP2002/003478 JP0203478W WO02090148A1 WO 2002090148 A1 WO2002090148 A1 WO 2002090148A1 JP 0203478 W JP0203478 W JP 0203478W WO 02090148 A1 WO02090148 A1 WO 02090148A1
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WO
WIPO (PCT)
Prior art keywords
infrared
mirror
camera
built
vehicle
Prior art date
Application number
PCT/JP2002/003478
Other languages
French (fr)
Japanese (ja)
Inventor
Hidenori Sato
Original Assignee
Murakami Corporation
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 Murakami Corporation filed Critical Murakami Corporation
Priority to US10/311,140 priority Critical patent/US20040252993A1/en
Publication of WO2002090148A1 publication Critical patent/WO2002090148A1/en

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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
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
    • H04N23/21—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only from near infrared [NIR] radiation

Definitions

  • the present invention relates to a mirror device with a built-in camera in which an infrared camera is built in a mirror case, and particularly to a mirror device with a built-in camera for a vehicle which is applied to a rearview mirror or the like and is suitable for monitoring a driver or a passenger of an automobile.
  • Background art
  • the camera of such a mirror imaging device is installed in the vehicle as a monitor in the vehicle room that monitors the driver and passengers, the driver and passengers will feel uncomfortable, and the lighting will be dazzling. Feeling, it is not acceptable. It would be expensive to attach a high-sensitivity camera to prevent this.
  • the above-mentioned known rearview mirrors for vehicles ensure that photographing can be performed with a CCD camera without being conscious of the passengers in the passenger seat and without deteriorating the design.
  • the reflective mirror itself is a so-called cold mirror that transmits infrared light and reflects other light, and monitors infrared light by detecting near-infrared light emitted from the occupant's body.
  • an infrared light emitter is provided at a predetermined position in a vehicle for determination, and this is used as a reference portion for determination.
  • the mirror imager as a monitor for the safety of the driver in the vehicle, to enhance the value of the mirror imaging device and add functions such as preventing the driver from falling asleep, the direction and movement of the face and eyelids For example, it is necessary to image the subject in the car more clearly, and it is not enough to image it with infrared rays emitted from the occupant's body.
  • a photographing camera when the captured image obtained by illuminating from different directions is image-processed and used as image information for determining a dozing state of a driver or the like, a photographing camera is used.
  • the illumination light for photographing emitted from a different direction partially produces a shadow on the face of a driver or the like as a subject, and becomes noise as image information.
  • the light emitting device is constantly lit and illuminated, there is a problem that energy consumption is large, the luminous intensity of the illuminating light is reduced, and stable imaging cannot be obtained due to disturbance light.
  • An object of the present invention is to solve the above-described problems of the conventional technology. Even when the present invention is used as a monitor for a vehicle, it does not give an uncomfortable feeling to a driver or a passenger who is the subject. A mirror device with a built-in camera that can shoot even fine movements of the subject clearly and accurately, without increasing noise when image processing is performed, and that does not reduce the reflection performance as a normal mirror Is realized. Disclosure of the invention
  • the present invention has a cold mirror mounted on a mirror case, and irradiates near-infrared to infrared light emitted from an infrared light emitting device to a subject in a vehicle through the cold mirror.
  • a mirror device with a built-in camera for a vehicle that receives the reflected light through the cold mirror and receives the light in the near-infrared to infrared region and shoots the image with an infrared power camera that can shoot an image.
  • the above A mirror device with a built-in camera for a vehicle, wherein the mirror device is disposed in the mirror case on the back side of the mirror.
  • the present invention has a cold mirror mounted on a mirror case, and irradiates near-infrared to infrared light emitted by an infrared light emitting device to a subject in a vehicle through the cold mirror.
  • a mirror device with a built-in camera for a vehicle that receives the reflected light through the cold mirror to receive light in the near-infrared to infrared region and captures the reflected light with an infrared power camera.
  • the intermittent light emission operation is performed by the driving device in synchronization with the shutter operation of the infrared camera.
  • the infrared camera, the infrared light emitting device, and the shutter synchronous light emission driving device are provided on the back side of the cold mirror and the mirror case.
  • the cold mirror is characterized in that on one side of a transparent glass plate as a multilayer functional film formed by coating the S io 2 thin film and T io 2 thin film multi layer.
  • the cold mirror is characterized in that it is used as a rear-view mirror in the left side of an automobile.
  • the infrared camera is an infrared digital camera, and is characterized in that a captured image signal is used as image information for pattern recognition in an image processing apparatus.
  • the shutter of the above camera performs a shutter operation once every 10 to 60 seconds, and the shutter speed is set to 1/250 to 1/10000 seconds. It is characterized by the following. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a diagram showing a configuration of an embodiment of a mirror device with a built-in infrared force mirror according to the present invention.
  • FIG. 2 is a diagram illustrating an embodiment of a mirror device with a built-in infrared camera according to the present invention.
  • FIG. 3 is a view showing a production example of a multilayer film as an example of a cold mirror used in the mirror device with a built-in infrared camera according to the present invention.
  • FIG. 4 is a diagram showing wavelength characteristics of the multilayer film of FIG.
  • FIG. 5 is a diagram for explaining the relationship between the timing of the opening operation of the shutter of the infrared ray camera according to the present invention and the timing of the infrared light emitting device.
  • FIG. 1 and FIG. 2 are diagrams illustrating the configuration of an embodiment of the present invention.
  • the mirror device with a built-in camera according to the present invention relates to a vehicle mirror such as a rearview mirror provided inside a vehicle.
  • the outline of the camera built-in mirror device 1 according to the present invention is as follows.Near-infrared light to infrared light emitted from the infrared light emitting device 2 is irradiated onto a subject 4 such as a driver or a passenger in the vehicle through a cold mirror 3. However, the reflected light is photographed by an infrared ray camera 5 capable of photographing light in the near infrared to infrared region.
  • the mirror device 1 with a built-in camera includes a mirror case 6, a cold mirror 13 held in the mirror case 6, and a mirror case on the back side of the cold mirror 3. 6, an infrared light emitting device 2, an infrared camera 5, and a shutter synchronous light emission driving device 7 provided on a base. Therefore, the infrared light emitting device 2 and the infrared camera 5 are hidden behind the cold mirror 3 and are configured to be invisible from the outside.
  • FIG. 3 shows an example of the production of a multilayer film as an example of such a cold mirror.
  • This air glass plate as the substrate from (in the figure “Air") side (in the figure “Sub Strate Glass]) to, S i 0 2 thin film and T i 0 2 - B a thin film is repeatedly stacked first to It consists of a multilayer film of 38 layers ("1 to 38" in Fig. 3).
  • the optical film thickness ( ⁇ (1) and film thickness (nm) are as shown in Fig. 3. Shows the wavelength characteristics of the multilayer film in FIG. A cold mirror having the characteristics shown in Fig.
  • the reflectivity 4 has a reflectivity of approximately 99% for light having a wavelength of 700 nm or less, and includes a near-infrared region to an infrared region exceeding 700 nm. For light of a wavelength, the reflectivity is about 5%, and light of such a wavelength passes through a cold mirror.
  • the cold mirror 13 of the mirror device 1 with a built-in infrared force mirror uses a cold mirror that reflects visible light and transmits light having a wavelength in the near infrared to infrared region.
  • the infrared light emitting device 2 has a light emitting body composed of a light emitting diode or the like that emits light having a wavelength in the near infrared to infrared range.
  • a light emitting diode or the like that emits light having a wavelength in the near infrared to infrared range.
  • an infrared light emitting diode using GaAs is used as an infrared light emitting diode that emits light having a wavelength in the infrared region.
  • the infrared camera 5 is, for example, an electronic infrared digital camera, which is a monochromatic infrared camera that is sensitive to light having a wavelength in the near-infrared to infrared region, and has a CCD or CMOS as a pixel.
  • the infrared camera 5 has an electronic shutter controlled by a control circuit provided on a control board. The shutter operates intermittently, for example, at intervals of 30 seconds, and the shutter
  • FIG. 5 is a diagram for explaining the relationship between the timing of the opening operation of the shutter of the infrared camera 5 of the present invention and the timing of the infrared light emitting device 2.
  • the power light emission amount
  • a shutter synchronous light emission driving device 7 is provided, whereby the infrared force camera 5 opens the shutter to photograph the subject 4, and the light emission of the infrared light emitting device 2 As shown in Fig. 5 (b), the timing is synchronized.
  • the image signal captured by the infrared camera 5 is sent to the image processing device via an image signal output line, and the image processing device performs pattern recognition in accordance with various uses of the mirror device 1 with a built-in infrared camera according to the present invention. Are performed. For example, in the case of being used for measures to prevent a driver from falling asleep as described later, as shown in FIG. 2, an image signal captured by the infrared camera 5 is sent to the image processing device 11 as image information. It is compared with the reference pattern of the driver's drowsiness mode, and is used to determine whether or not the driver is in the drowsiness mode.
  • the operation of the mirror device 1 with a built-in infrared camera according to the present invention having the above-described configuration will be described in the case where the mirror device 1 with a built-in infrared camera is used as a rearview mirror mounted inside a vehicle.
  • the mirror device 1 with built-in infrared force mirror is mounted in the same manner as a normal back mirror.
  • the mirror device with built-in infrared camera 1 functions as a normal rearview mirror, and also prevents, for example, driver's inattentive driving (driving while looking aside for a certain period of time) or falling asleep. It can be used for various purposes such as security measures, security measures for passengers, especially infants and the elderly, and taxi robbery measures.
  • the mirror device 1 with a built-in infrared camera adjusts the irradiation direction of the infrared light emitting device 2 and the photographing direction of the infrared power camera 5 in accordance with the purpose of use, for example, the direction of the driver, the front passenger seat and the front passenger seat.
  • the direction of the taxi eg, the direction of the child seat
  • the direction of the taxi customer, etc. should be adjusted in advance.
  • the mirror device 1 with a built-in infrared force lens only the near-infrared to infrared wavelengths pass through the cold mirror 13 and the visible light is reflected. Accordingly, light having a wavelength in the near-infrared to infrared range from the infrared light emitting device 2 passes through the cold mirror 3 and irradiates the subject 4, and the reflected light passes through the cold mirror 13 again and is received by the infrared power camera 5. Is taken. Most of the visible light is reflected by the cold mirror, so it functions as a normal back mirror.
  • the shutter is opened once, and during this time, image signals are taken into all pixels of the camera.
  • This image signal is output by sequential transfer in the case of CCD, and is output by sequential switching in the case of CMOS, and is sent to an external image processing device 11 to constitute one screen and is subjected to pattern recognition.
  • the subject 4 to be the target of the infrared camera 5 is regarded as the driver's face or a part of the face, and the driver's face orientation and eyelid closing condition.
  • the image is patterned by the image processing device 11 Compared with the reference pattern in the drowsiness driving mode in which the eyelids are likely to close, the driver is able to immediately judge inattentive driving and drowsiness driving, and to alert the driver with warnings or other means.
  • the infrared power camera 5 and the infrared light emitting device 2 are hidden behind the cold mirror 3, so that the driver, passenger, or other person who is the subject uses a normal rearview mirror. Compared to the case where the user is using the camera, there is no special consciousness such as being monitored by the infrared camera 5, and the user does not feel any discomfort at all.
  • the interior of the car is particularly dark at night, so it is not possible to expect a clear image even when shooting with natural light using a camera that shoots with ordinary visible light. , And a clear captured image can be obtained by taking an image with the infrared camera 5.
  • the subject 4 when photographing a driver or a passenger, which is the subject 4, if the infrared light emitting device 2 and the infrared power camera 5 are far apart, the subject 4 is irradiated with light obliquely or laterally. Inconsistencies arise in pattern recognition, such as the occurrence of shadows due to the unevenness of the driver's face and the occurrence of shadows formed by the nose in the eyes.
  • the infrared camera 5 and the infrared light emitting device 2 are arranged in the mirror case 6, so that the infrared light device 5 and the infrared light emitting device 2 are close to each other. The occurrence of shadows due to light is prevented, and as a result, image information for accurate pattern recognition can be obtained.
  • the driver who is the subject 4 depends on the height, sitting height, seat setting method, and the like. Will take various positions with respect to. However, regardless of the position of the rearview mirror in relation to the driver, the rearview mirror must be used to view the rearview mirror and view the rearview mirror. By adjusting the angle for use, the relative angle relationship between the direction of the rearview mirror and the driver's face is almost constant.
  • the infrared light emitting device 2 and the infrared camera 5 are set in the mirror case 6, so that the cold angle is considered in consideration of the above relative angular relationship. If the direction of the infrared light emitting device 2 and the infrared camera 5 with respect to the direction of the mirror is set so as to be in the direction of the subject, even if different drivers sit differently, the use of the rearview mirror as described above is possible. By adjusting the angle, the relationship between the driver's face, which is the subject 4, and the infrared camera 5 is almost always facing the front, and the angular conditions for image recognition can be consistently adjusted to some extent. .
  • the infrared camera, the infrared light emitting device, and the shutter synchronous light emission driving device are arranged in the mirror case on the back side of the cold mirror. Since the driving device adopts a configuration in which the light emission operation is performed in synchronization with the shutter operation of the infrared camera, the following effects are produced.
  • the driver or passenger who is the subject, does not feel any discomfort without being aware of the existence of an infrared camera or infrared light emitting device. Also, the illumination light from the infrared light emitting device does not feel glare and consumes little energy.
  • the mirror device is suitable for a camera built-in mirror device having a built-in infrared camera in a mirror case, particularly a vehicle camera mirror device for monitoring a driver of a car or a passenger.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Cameras In General (AREA)
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Abstract

An infrared camera (5), an infrared emission device (2), and a shutter-synchronized light emission drive device (7) are provided at the rear side of a cold mirror (3) in a mirror case (6), and the infrared emission device (2) performs an intermittent light emitting operation by means of the light emission drive device (7) in synchronization with the shutter operation of the camera (5), whereby a clear, accurate, stable photographed image is obtained with the infrared camera kept transparent to an object such as a driver and occupants and no incongruity given to them, while being kept free from disturbance light effect.

Description

明 細 書  Specification
カメラ内蔵ミラー装置 技術分野 Mirror device with built-in camera
本発明は、 ミラーケース内に赤外線カメラを内蔵したカメラ内蔵ミラー装置に 関し、 特に、 バック ミラー等へ適用し、 自動車の運転手や同乗者をモニタするた めに好適な車両用カメラ内蔵ミラー装置に関する。 背景技術  The present invention relates to a mirror device with a built-in camera in which an infrared camera is built in a mirror case, and particularly to a mirror device with a built-in camera for a vehicle which is applied to a rearview mirror or the like and is suitable for monitoring a driver or a passenger of an automobile. About. Background art
従来、ハーフミラ一によって、入射光を一部反射するとともに一部透過させて、 その透過光で撮像するカメラと ミラーを組み合わせたミラー撮像装置は知られて いる。 又、 車両用のルームミラ一等の反射鏡のケースの内部に撮像手段を設け、 反射鏡を透過した光で撮影する室内を監視する装置はすでに特開 2 0 0 0— 2 6 4 1 2 8号公報で公知である。  2. Description of the Related Art Conventionally, there is known a mirror image pickup device that combines a camera and a mirror that partially reflects incident light and partially transmits incident light using a half mirror and captures an image with the transmitted light. Further, an apparatus for providing an image pickup means inside a case of a reflecting mirror such as a room mirror for a vehicle and monitoring an indoor room for photographing with light transmitted through the reflecting mirror has already been disclosed in Japanese Patent Application Laid-Open No. 2000-2664128. It is known in Japanese Patent Publication No.
従来のハーフミラーを利用するミラー撮像装置では、 透過率及び反射率が夫々 5 0 %程度のハーフミラーを用いるが、 反射率 5 0 %程度であると鮮明な反射像 をミラーで視認しにくいし、 透過率 5 0 %ではハーフミラーを透過した光によつ て撮像装置でとらえる画像も暗くなり、 特に暗がりでは見にく くなる。 これを補 うためにカメラに照明を付けると、 カメラが有ることが分かるし、 カメラとは別 の周辺につけると、 デザィン及び費用の点で好ましくない。  Conventional mirror imaging devices that use half mirrors use half mirrors with a transmittance and a reflectance of about 50%, respectively.However, a reflectance of about 50% makes it difficult to see a clear reflected image with the mirror. At a transmittance of 50%, an image captured by the imaging device due to light transmitted through the half mirror becomes dark, and it is difficult to see the image, especially in darkness. If you add lighting to the camera to make up for this, you can see that there is a camera, and if you attach it to a different area from the camera, it is not desirable in terms of design and cost.
このよ うなミラー撮像装置のカメラを、 運転者や同乗者をモニターする車両室 内のモニターと して車両に設けると、 運転者や同乗者に違和感を感じさせるとと もに照明に眩しさを感じ、 到底受け入られるものではない。 これを防止するため に、 高感度カメラをつけると高価となる。  If the camera of such a mirror imaging device is installed in the vehicle as a monitor in the vehicle room that monitors the driver and passengers, the driver and passengers will feel uncomfortable, and the lighting will be dazzling. Feeling, it is not acceptable. It would be expensive to attach a high-sensitivity camera to prevent this.
又、 上記公知の車両用のルームミラーは、 助手席乗員を意識させることなく、 デザインも損なう ことなく、確実に C C Dカメラで撮影できるようにしている点、 並びに撮像手段を赤外線カメラとすると ともに、 反射鏡本体を赤外線が透過し、 他の光を反射する所謂コールドミラーと し、 乗員の身体から発せられる近赤外線 を検出することで赤外線を監視する点、 さらに赤外線力メラの位置が適正か否か 判定するために車両内の所定位置に赤外線発光器を設け、 これを判定のための基 準部位とすることが記載されている。 In addition, the above-mentioned known rearview mirrors for vehicles ensure that photographing can be performed with a CCD camera without being conscious of the passengers in the passenger seat and without deteriorating the design. The reflective mirror itself is a so-called cold mirror that transmits infrared light and reflects other light, and monitors infrared light by detecting near-infrared light emitted from the occupant's body. Or It is described that an infrared light emitter is provided at a predetermined position in a vehicle for determination, and this is used as a reference portion for determination.
しかしながら、 ミラー撮像装置を運転者の居眠り防止等、 より付加価値を高め て高機能化して、車内の運転者の安全のためのモニターと して利用するためには、 顔や瞼の向きや動き等、 車内の被写体をより鮮明に撮像する必要があり、 乗員の 身体から発せられる赤外線で撮像しているようでは十分ではない。  However, in order to use the mirror imager as a monitor for the safety of the driver in the vehicle, to enhance the value of the mirror imaging device and add functions such as preventing the driver from falling asleep, the direction and movement of the face and eyelids For example, it is necessary to image the subject in the car more clearly, and it is not enough to image it with infrared rays emitted from the occupant's body.
これを解決するためには、 撮影用の照明光が必要であるが、 特に車両用のモニ ターと してこの種のミラ一撮像装置を利用する場合は、 車内に照明装置を設ける と、 被写体である運転者、 同乗者に不自然さや違和感を与え、 デザイン上も好ま しくない。 '  In order to solve this, illumination light for photographing is necessary, but especially when this type of mirror image pickup device is used as a monitor for vehicles, installing an illumination device inside the car will make It gives unnatural and uncomfortable feelings to drivers and passengers, and is not desirable in terms of design. '
又、光学的にも、異方向から照明して得られた撮影画像を画像処理することで、 運転者等の居眠り状態を判定するような画像情報として利用される場合には、 撮 影カメラと異方向から照射される撮影用の照明光は、 被写体である運転者等の顔 に部分的に陰影を生じてしまい、 画像情報と してノイズとなってしまう。  In addition, optically, when the captured image obtained by illuminating from different directions is image-processed and used as image information for determining a dozing state of a driver or the like, a photographing camera is used. The illumination light for photographing emitted from a different direction partially produces a shadow on the face of a driver or the like as a subject, and becomes noise as image information.
さらに、 発光装置は常時発光させて照明すると、 エネルギー消費量が多く、 照 明光の光度を低下させてしまい、 外乱光により安定した撮像が得られないという 問題がある。  Furthermore, if the light emitting device is constantly lit and illuminated, there is a problem that energy consumption is large, the luminous intensity of the illuminating light is reduced, and stable imaging cannot be obtained due to disturbance light.
本発明は、 以上のような従来技術の問題点を解決することを目的とするもので あり、 車両用モニターと して利用しても、 被写体である運転者、 同乗者に違和感 を与えることなく、 被写体の細かい動作も鮮明かつ正確にしかも画像処理した場 合にノイズが増加するようなことなく撮影でき、 しかも通常のミラーと しての反 射能力を低下させることのない、 カメラ内蔵ミラー装置を実現するものである。 発明の開示  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the conventional technology. Even when the present invention is used as a monitor for a vehicle, it does not give an uncomfortable feeling to a driver or a passenger who is the subject. A mirror device with a built-in camera that can shoot even fine movements of the subject clearly and accurately, without increasing noise when image processing is performed, and that does not reduce the reflection performance as a normal mirror Is realized. Disclosure of the invention
本発明は上記課題を解決するために、 ミラーケースに装着されたコールドミラ 一を有し、 赤外線発光装置で発光した近赤外から赤外域の光を、 上記コールドミ ラーを通して車内の被写体に照射し、 その反射光を上記コールドミラ一を通して 近赤外から赤外域の光を受光して撮影可能な赤外線力メラで撮影する車両用カメ ラ内蔵ミラー装置であって、 上記赤外線カメラ及び赤外線発光装置は、 上記コー ルドミラーの裏面側において上記ミラーケ一ス内に配設されていることを特徴と する車両用カメラ内蔵ミラー装置を提供する。 In order to solve the above problem, the present invention has a cold mirror mounted on a mirror case, and irradiates near-infrared to infrared light emitted from an infrared light emitting device to a subject in a vehicle through the cold mirror. A mirror device with a built-in camera for a vehicle that receives the reflected light through the cold mirror and receives the light in the near-infrared to infrared region and shoots the image with an infrared power camera that can shoot an image. The above A mirror device with a built-in camera for a vehicle, wherein the mirror device is disposed in the mirror case on the back side of the mirror.
本発明は上記課題を解決するために、 ミラーケースに装着されたコールドミラ 一を有し、 赤外線発光装置で発光した近赤外から赤外域の光を、 上記コールドミ ラーを通して車内の被写体に照射し、 その反射光を上記コールドミラーを通して 近赤外から赤外域の光を受光して撮影可能な赤外線力メラで撮影する車両用カメ ラ内蔵ミラー装置であって、 上記赤外線発光装置は、 シャッター同期発光駆動装 置により赤外線カメラのシャッター動作と同期して間欠発光動作を行うものであ り、 上記赤外線カメラ、 赤外線発光装置及びシャッター同期発光駆動装置は、 上 記コールドミラーの裏面側において上記ミラ一ケース内に配設されていることを 特徴とする車両用カメラ内蔵ミラー装置を提供する。  In order to solve the above-mentioned problems, the present invention has a cold mirror mounted on a mirror case, and irradiates near-infrared to infrared light emitted by an infrared light emitting device to a subject in a vehicle through the cold mirror. A mirror device with a built-in camera for a vehicle that receives the reflected light through the cold mirror to receive light in the near-infrared to infrared region and captures the reflected light with an infrared power camera. The intermittent light emission operation is performed by the driving device in synchronization with the shutter operation of the infrared camera. The infrared camera, the infrared light emitting device, and the shutter synchronous light emission driving device are provided on the back side of the cold mirror and the mirror case. A mirror device with a built-in camera for a vehicle, wherein the mirror device is disposed in the vehicle.
上記コールドミラーは、 透明ガラス板の片面に S i o 2薄膜と T i o 2薄膜を多 層にコーティングして成る多層機能膜であることを特徴とする。 The cold mirror is characterized in that on one side of a transparent glass plate as a multilayer functional film formed by coating the S io 2 thin film and T io 2 thin film multi layer.
上記コールドミラ一は、 自動車の左内のバック ミラーと して利用されるもので あることを特徴とする。  The cold mirror is characterized in that it is used as a rear-view mirror in the left side of an automobile.
上記赤外線カメラは、 赤外線デジタルカメラであり、 撮影した画像信号を、 画 像情報と して画像処理装置におけるパターン認識に供することを特徴とする。 上記カメラのシャッターは、 1 0〜 6 0秒に 1回の間隔でシャッター動作を行 レ、、 そのシャツタ一速度は 1 / 2 5 0〜 1 / 1 0 0 0 0 0秒に設定されるもので あることを特徴とする。 図面の簡単な説明  The infrared camera is an infrared digital camera, and is characterized in that a captured image signal is used as image information for pattern recognition in an image processing apparatus. The shutter of the above camera performs a shutter operation once every 10 to 60 seconds, and the shutter speed is set to 1/250 to 1/10000 seconds. It is characterized by the following. BRIEF DESCRIPTION OF THE FIGURES
第 1図は、 本発明に係る赤外線力メラ内蔵ミラー装置の実施例の構成を示す図 である。  FIG. 1 is a diagram showing a configuration of an embodiment of a mirror device with a built-in infrared force mirror according to the present invention.
第 2図は、 本発明に係る赤外線カメラ内蔵ミラー装置の実施例を説明する図で ある。  FIG. 2 is a diagram illustrating an embodiment of a mirror device with a built-in infrared camera according to the present invention.
第 3図は、 本発明に係る赤外線カメラ内蔵ミラー装置に使用されるコールドミ ラーの一例と しての多層膜の製作例を示す図である。  FIG. 3 is a view showing a production example of a multilayer film as an example of a cold mirror used in the mirror device with a built-in infrared camera according to the present invention.
第 4図は、 第 3図の多層膜の波長特性を示す図である。 第 5図は、 本発明に係る赤外線力メラのシャッターの開動作のタイ ミングと、 赤外線発光装置のタイ ミングとの関係を説明する図である。 発明を実施するための最良の形態 FIG. 4 is a diagram showing wavelength characteristics of the multilayer film of FIG. FIG. 5 is a diagram for explaining the relationship between the timing of the opening operation of the shutter of the infrared ray camera according to the present invention and the timing of the infrared light emitting device. BEST MODE FOR CARRYING OUT THE INVENTION
本発明をより詳細に説述するために、 添付の図面に従ってこれを説明する。 第 1図、 第 2図は、 本発明の実施例の構成を説明する図である。 本発明に係るカメ ラ内蔵ミラー装置は、 自動車の室内に設けられるバック ミラー等の自動車用ミラ 一に関する。  The present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 and FIG. 2 are diagrams illustrating the configuration of an embodiment of the present invention. The mirror device with a built-in camera according to the present invention relates to a vehicle mirror such as a rearview mirror provided inside a vehicle.
本発明に係るカメラ内蔵ミラー装置 1の概要は、 赤外線発光装置 2で発光した 近赤外〜赤外域の光を、 コールドミラー 3を通して車内の運転者や同乗者等の被 写体 4に照射し、 その反射光を近赤外〜赤外域の光で撮影可能な赤外線力メラ 5 で撮影するものである。  The outline of the camera built-in mirror device 1 according to the present invention is as follows.Near-infrared light to infrared light emitted from the infrared light emitting device 2 is irradiated onto a subject 4 such as a driver or a passenger in the vehicle through a cold mirror 3. However, the reflected light is photographed by an infrared ray camera 5 capable of photographing light in the near infrared to infrared region.
このカメラ内蔵ミラー装置 1は、 第 1図 （ a ) に示すように、 ミラーケース 6 と、 このミラ一ケース 6に保持されたコ一ルドミラ一 3 と、 コールドミラー 3の 裏面側において、 ミラーケース 6内で基台上に設けられた赤外線発光装置 2、 赤 外線カメラ 5及びシャッター同期発光駆動装置 7 とを備えている。 従って、 赤外 線発光装置 2及び赤外線カメラ 5は、 コールドミラー 3の裏に隠れており、 外部 から見ることはできないように構成されている。  As shown in FIG. 1 (a), the mirror device 1 with a built-in camera includes a mirror case 6, a cold mirror 13 held in the mirror case 6, and a mirror case on the back side of the cold mirror 3. 6, an infrared light emitting device 2, an infrared camera 5, and a shutter synchronous light emission driving device 7 provided on a base. Therefore, the infrared light emitting device 2 and the infrared camera 5 are hidden behind the cold mirror 3 and are configured to be invisible from the outside.
コール ドミラ一 3は、 第 1図 （b ) に示すように、 基材となる透明なガラス板 8上に、 S i 02薄膜 9及び T i 02薄膜 1 0を多層に組み合わせてコーティング して形成される。 第 1図 （ b ) に示すコール ドミラーでは、 S i 02薄膜 9及び T i 02薄膜 1 0を 2層でコーティングしたものであるが、 S i 02薄膜 9及び T i O 2薄膜 1 0の夫々の膜厚の違い及び層数によ り、 任意の波長特性を有する多 層膜を得ることができる。 Call Domira one 3, as shown in Fig. 1 (b), on a transparent glass plate 8 as a base material, and coated in combination S i 0 2 thin film 9 and T i 0 2 thin film 1 0 multilayer Formed. The call Domira shown in Fig. 1 (b), but is obtained by coating the S i 0 2 thin film 9 and T i 0 2 thin film 1 0 two layers, S i 0 2 thin film 9 and T i O 2 film 1 A multilayer film having an arbitrary wavelength characteristic can be obtained depending on the difference in film thickness and the number of layers for each of 0.
第 3図は、 このよ うなコールドミラーの一例と しての多層膜の製作例を示すも のである。 これは、 空気 （図中 「Air」） 側から基板であるガラス板 （図中 「Sub strate Glass]) まで、 S i 02薄膜と T i 02— B a薄膜が繰り返し積層され第 1〜 3 8層 （第 3図中 「 1〜 3 8」） の多層膜から構成されている。 そして、 そ の光学膜厚 （λ (1) 及び膜厚 （n m) は、 第 3図に示される通りである。 第 4図 は、 第 3図の多層膜の波長特性を示す。 第 4図に示す特性を有するコールドミラ 一では、 7 0 0 n m以下の波長の光に対しては反射率がほぼ 9 9 %であり、 7 0 0 n mを超える近赤外域〜赤外域を含む波長の光に対しては反射率が 5 %程度と なり、 このような波長の光ではコールドミラーを透過する。 FIG. 3 shows an example of the production of a multilayer film as an example of such a cold mirror. This air glass plate as the substrate from (in the figure "Air") side (in the figure "Sub Strate Glass]) to, S i 0 2 thin film and T i 0 2 - B a thin film is repeatedly stacked first to It consists of a multilayer film of 38 layers ("1 to 38" in Fig. 3). The optical film thickness (λ (1) and film thickness (nm) are as shown in Fig. 3. Shows the wavelength characteristics of the multilayer film in FIG. A cold mirror having the characteristics shown in Fig. 4 has a reflectivity of approximately 99% for light having a wavelength of 700 nm or less, and includes a near-infrared region to an infrared region exceeding 700 nm. For light of a wavelength, the reflectivity is about 5%, and light of such a wavelength passes through a cold mirror.
要するに、 赤外線力メラ内蔵ミラー装置 1 のコールドミラ一 3は可視光を反射 し、 近赤外〜赤外域の波長の光を透過させるコールドミラーを用いる。  In short, the cold mirror 13 of the mirror device 1 with a built-in infrared force mirror uses a cold mirror that reflects visible light and transmits light having a wavelength in the near infrared to infrared region.
赤外線発光装置 2 としては、 近赤外〜赤外域の波長の光を発光する発光ダイォ ード等から成る発光体を有する。 例えば、 赤外域の波長の光を発光する赤外発光 ダイォードと しては、 G a A s を用いた赤外発光ダイォードが利用される。 赤外線カメラ 5は、 例えば、 電子式の赤外線デジタルカメラであって、 近赤外 〜赤外域の波長の光に感応するモノク口の赤外線カメラが利用され、 その画素と して、 C C Dや C M O Sを有する。 この赤外線カメラ 5は、 制御基板に設けられ た制御回路で制御される電子シャッターを有している。 このシャッターは、 間歇 的、 例えば 3 0秒間隔で動作し、 そのシャ ツタ一速度は 1 / 2 5 0〜 1 1 0 0 0 0 0秒程度に設定する。  The infrared light emitting device 2 has a light emitting body composed of a light emitting diode or the like that emits light having a wavelength in the near infrared to infrared range. For example, an infrared light emitting diode using GaAs is used as an infrared light emitting diode that emits light having a wavelength in the infrared region. The infrared camera 5 is, for example, an electronic infrared digital camera, which is a monochromatic infrared camera that is sensitive to light having a wavelength in the near-infrared to infrared region, and has a CCD or CMOS as a pixel. . The infrared camera 5 has an electronic shutter controlled by a control circuit provided on a control board. The shutter operates intermittently, for example, at intervals of 30 seconds, and the shutter speed is set to about 1/250 to 11000 seconds.
第 5図は、 本発明の赤外線カメラ 5のシャッターの開動作のタイ ミングと、 赤 外線発光装置 2のタイ ミングとの関係を説明する図である。 赤外線発光装置 2に 組み込まれる発光ダイオードは、 第 5図 （ a ) に示すように、 常時発光させると パワー （発光量） が少なく十分な撮影光量が得られない。 又、 常時発光すると、 放熱が多く、 装置全体が加熱され、 しかもエネルギーが消耗されるという点で、 必ずしも好ましくない。 従って、 パワーを上げて、 且つ放熱乃至エネルギーの消 耗を少なくするためには、 間欠的に点灯させるとよい。  FIG. 5 is a diagram for explaining the relationship between the timing of the opening operation of the shutter of the infrared camera 5 of the present invention and the timing of the infrared light emitting device 2. As shown in FIG. 5 (a), if the light emitting diode incorporated in the infrared light emitting device 2 is always lit, the power (light emission amount) is small and a sufficient photographing light amount cannot be obtained. Also, it is not always preferable to emit light constantly because heat is radiated a lot, the entire apparatus is heated, and energy is consumed. Therefore, in order to increase power and reduce heat dissipation or energy consumption, it is preferable to turn on the light intermittently.
そこで、 本発明に係る赤外線カメラ内蔵ミラー装置 1では、 シャッター同期発 光駆動装置 7を設け、 これにより赤外線力メラ 5がシャッターが開いて被写体 4 を撮影するタイ ミングと、 赤外線発光装置 2の発光のタイ ミ ングとを、 第 5図 ( b ) に示すように同期させるような構成と している。  Therefore, in the mirror device 1 with a built-in infrared camera according to the present invention, a shutter synchronous light emission driving device 7 is provided, whereby the infrared force camera 5 opens the shutter to photograph the subject 4, and the light emission of the infrared light emitting device 2 As shown in Fig. 5 (b), the timing is synchronized.
なお、 赤外線カメラ 5で撮影した画像信号は、 画像信号取出線により画像処理 装置に送られ、 本発明に係る赤外線カメラ内蔵ミラー装置 1 のいろいろな利用目 的に応じて、 画像処理装置においてパターン認識等の処理が行われる。 例えば、 後述するような運転者の居眠り防止対策に利用される場合は、 第 2図 に示すように、 赤外線カメラ 5で撮影した画像信号は、 画像情報と して画像処理 装置 1 1に送られてパターン化され、 運転者の眠気モー ドの基準パターンと比較 され、 運転者が眠気モードにあるか否かの判定に供せられる。 The image signal captured by the infrared camera 5 is sent to the image processing device via an image signal output line, and the image processing device performs pattern recognition in accordance with various uses of the mirror device 1 with a built-in infrared camera according to the present invention. Are performed. For example, in the case of being used for measures to prevent a driver from falling asleep as described later, as shown in FIG. 2, an image signal captured by the infrared camera 5 is sent to the image processing device 11 as image information. It is compared with the reference pattern of the driver's drowsiness mode, and is used to determine whether or not the driver is in the drowsiness mode.
以上の構成から成る本発明に係る赤外線カメラ内蔵ミラー装置 1の作用につい て、 この赤外線カメラ内蔵ミラー装置 1 を自動車の室内に搭載のバック ミラーと して使用する場合について説明する。 この赤外線力メラ内蔵ミラー装置 1 を通常 のバック ミラ一と同様に取り付ける。  The operation of the mirror device 1 with a built-in infrared camera according to the present invention having the above-described configuration will be described in the case where the mirror device 1 with a built-in infrared camera is used as a rearview mirror mounted inside a vehicle. The mirror device 1 with built-in infrared force mirror is mounted in the same manner as a normal back mirror.
赤外線カメラ内蔵ミラ一装置 1は、 通常のバック ミラーと しての機能を発揮す るとともに、 例えば、 運転者の脇見運転 （一定時間以上の脇見を続けながら運転 する。） や居眠り運転等の防止対策、 同乗者、 特に幼児や老人の安全対策、 タク シー強盗対策等各種の利用目的で使用可能である。  The mirror device with built-in infrared camera 1 functions as a normal rearview mirror, and also prevents, for example, driver's inattentive driving (driving while looking aside for a certain period of time) or falling asleep. It can be used for various purposes such as security measures, security measures for passengers, especially infants and the elderly, and taxi robbery measures.
赤外線カメラ内蔵ミラ一装置 1は、 このような使用目的に対応するように、 赤 外線発光装置 2の照射方向及び赤外線力メラ 5の撮影方向を、 例えば運転者の方 向、 助手席の助手席の方向 （例. チャイル ドシー トの方向）、 タクシーの顧客の 方向等となるように、 予め調整しておく。  The mirror device 1 with a built-in infrared camera adjusts the irradiation direction of the infrared light emitting device 2 and the photographing direction of the infrared power camera 5 in accordance with the purpose of use, for example, the direction of the driver, the front passenger seat and the front passenger seat. The direction of the taxi (eg, the direction of the child seat), the direction of the taxi customer, etc. should be adjusted in advance.
この赤外線力メラ内蔵ミラ一装置 1では、 近赤外〜赤外域の波長のみがコール ドミラ一 3を透過し、 可視光は反射される。 従って、 赤外線発光装置 2からの近 赤外〜赤外域の波長の光は、 コールドミラー 3を通り被写体 4に照射され、 その 反射光が再びコールドミラ一 3を通り、赤外線力メラ 5で受光されて撮影される。 可視光は、 コ一ルドミラ一 3でほとんど反射されるから、 通常のバック ミラ一と して機能する。  In the mirror device 1 with a built-in infrared force lens, only the near-infrared to infrared wavelengths pass through the cold mirror 13 and the visible light is reflected. Accordingly, light having a wavelength in the near-infrared to infrared range from the infrared light emitting device 2 passes through the cold mirror 3 and irradiates the subject 4, and the reflected light passes through the cold mirror 13 again and is received by the infrared power camera 5. Is taken. Most of the visible light is reflected by the cold mirror, so it functions as a normal back mirror.
赤外線カメラ 5ではシャッタ一が 1回開き、 この間にカメラの全画素に画像信 号を取り込む。 そして、 この画像信号は、 C C Dの場合は順次転送により、 又 C M O Sの場合は順次切り替えにより出力されて、 外部の画像処理装置 1 1に送ら れ 1画面を構成し、 パターン認識に供せられる。  In the infrared camera 5, the shutter is opened once, and during this time, image signals are taken into all pixels of the camera. This image signal is output by sequential transfer in the case of CCD, and is output by sequential switching in the case of CMOS, and is sent to an external image processing device 11 to constitute one screen and is subjected to pattern recognition.
例えば、 運転者の脇見や居眠り防止対策の場合は、 赤外線カメラ 5のタ一ゲッ トとする被写体 4を運転者の顔又は顔の一部と し、 運転者の顔の向きや瞼の閉じ 具合等を撮影し、 その画像を画像処理装置 1 1でパターン化して、 脇見運転モー ドゃ瞼が閉じそうな眠気運転モードの基準パターンと比較し、 脇見運転や眠気運 転を即座に判定し、 警報やその他手段で運転者の注意喚起を促すよ うにする構成 となっている。 For example, in the case of measures to prevent the driver from looking aside or falling asleep, the subject 4 to be the target of the infrared camera 5 is regarded as the driver's face or a part of the face, and the driver's face orientation and eyelid closing condition. The image is patterned by the image processing device 11 Compared with the reference pattern in the drowsiness driving mode in which the eyelids are likely to close, the driver is able to immediately judge inattentive driving and drowsiness driving, and to alert the driver with warnings or other means.
この赤外線力メラ内蔵ミラー装置 1では、 赤外線力メラ 5や赤外線発光装置 2 はコールドミラー 3の裏側に隠れているから、 運転者、 同乗者等の被写体となる 者は、 通常のバック ミラーを利用している場合と比べて、 赤外線カメラ 5でモニ ターされている等の特別の意識をすることがなく、 違和感も全く感じることがな レゝ  In the mirror device 1 with a built-in infrared power mirror, the infrared power camera 5 and the infrared light emitting device 2 are hidden behind the cold mirror 3, so that the driver, passenger, or other person who is the subject uses a normal rearview mirror. Compared to the case where the user is using the camera, there is no special consciousness such as being monitored by the infrared camera 5, and the user does not feel any discomfort at all.
又、 撮影光と して可視光を利用しないので、 近赤外〜赤外域の波長の光を利用 するから運転者や同乗者は、 赤外線発光装置 2からの照射光を眩しく、 不愉快と 感じることがなく、 快適な運転、 ドライブが可能となる。  In addition, since visible light is not used as photographing light, light having a wavelength in the near-infrared to infrared region is used, so that the driver and passengers may find the irradiation light from the infrared light emitting device 2 dazzling and unpleasant. There is no driving, and comfortable driving and driving are possible.
そして、 車内は、 特に夜間は暗いので、 通常の可視光で撮影するカメラを用い 自然光で撮影しても鮮明に撮影することは期待できないが、 近赤外〜赤外域の波 長の光を被写体に照射し、 赤外線カメラ 5で撮影すれば、 鮮明な撮影画像が得ら れる。  The interior of the car is particularly dark at night, so it is not possible to expect a clear image even when shooting with natural light using a camera that shoots with ordinary visible light. , And a clear captured image can be obtained by taking an image with the infrared camera 5.
さらに、 被写体 4である運転者や同乗者等を撮影する場合、 赤外線発光装置 2 と赤外線力メラ 5が離れていると、 被写体 4に斜めや横方向から光を照射される ために、 例えば、 運転者の顔の凹凸により影となるところが生じ、 鼻でできた影 が目に生じると目が識別できない等、 パターン認識上不正確さの原因となり不都 合が生じる。  Further, when photographing a driver or a passenger, which is the subject 4, if the infrared light emitting device 2 and the infrared power camera 5 are far apart, the subject 4 is irradiated with light obliquely or laterally. Inconsistencies arise in pattern recognition, such as the occurrence of shadows due to the unevenness of the driver's face and the occurrence of shadows formed by the nose in the eyes.
本発明の赤外線力メラ内蔵ミラー装置 1では、 ミラーケース 6内に赤外線カメ ラ 5と赤外線発光装置 2を配設したので、 赤外線力メラ 5 と赤外線発光装置 2が 互いに近接しており、 上記照射光による陰影の発生等が防止され、 その結果正確 なパターン認識のための画像情報を得ることができる。  In the mirror device 1 with a built-in infrared force lens of the present invention, the infrared camera 5 and the infrared light emitting device 2 are arranged in the mirror case 6, so that the infrared light device 5 and the infrared light emitting device 2 are close to each other. The occurrence of shadows due to light is prevented, and as a result, image information for accurate pattern recognition can be obtained.
なお、 本発明に係る赤外線カメラ内蔵ミラ一装置 1 をバック ミラーで運転者を モニターする場合についてみると、 被写体 4である運転者は、 その身長、 座高、 座席のセッ トの仕方等によりバック ミラーに対していろいろな位置をとることと なる。 しかしながら、バック ミラーが運転者といろいろな位置関係にあろう とも、 運転者がバック ミラ一で後方窓からの光景を見ようとするためにバック ミラーの 利用のための角度を調整すれば、 バック ミラーの方向と運転者の顔との相対的な 角度関係はほぼ一定である。 In the case where the mirror device 1 with a built-in infrared camera according to the present invention is used to monitor a driver with a rearview mirror, the driver who is the subject 4 depends on the height, sitting height, seat setting method, and the like. Will take various positions with respect to. However, regardless of the position of the rearview mirror in relation to the driver, the rearview mirror must be used to view the rearview mirror and view the rearview mirror. By adjusting the angle for use, the relative angle relationship between the direction of the rearview mirror and the driver's face is almost constant.
本発明に係る赤外線力メラ内蔵ミ ラー装置 1では、 ミラーケース 6内に赤外線 発光装置 2 と赤外線カメラ 5がセッ トされている構成であるから、 上記相対的角 度関係を考慮して、 コールドミラーの向きに対する赤外線発光装置 2及び赤外線 カメラ 5の方向を被写体方向になるようにセッ ト しておけば、 異なる運転者が異 なる座りかたをしても、 上記のとおりバック ミラーの利用のための角度を調整す れば、 被写体 4である運転者の顔と赤外線カメラ 5の関係は常にほぼ正面に対向 する関係となり、 画像認識の角度的な条件をある程度一定に整合することができ る。  In the mirror device 1 with a built-in infrared force lens according to the present invention, the infrared light emitting device 2 and the infrared camera 5 are set in the mirror case 6, so that the cold angle is considered in consideration of the above relative angular relationship. If the direction of the infrared light emitting device 2 and the infrared camera 5 with respect to the direction of the mirror is set so as to be in the direction of the subject, even if different drivers sit differently, the use of the rearview mirror as described above is possible. By adjusting the angle, the relationship between the driver's face, which is the subject 4, and the infrared camera 5 is almost always facing the front, and the angular conditions for image recognition can be consistently adjusted to some extent. .
以上、 本発明に係る赤外線カメラ內蔵ミラー装置の実施形態を実施例に基づい て説明したが、 本発明は特にこのよ うな実施例に限定されることなく、 特許請求 の範囲記載の技術的事項の範囲内でいろいろな実施例があることはいうまでもな レゝ  As mentioned above, the embodiment of the infrared camera storage mirror device according to the present invention has been described based on the embodiments. However, the present invention is not particularly limited to such embodiments, and the technical matters described in the claims are described. It goes without saying that there are various embodiments within the range of
以上のような本発明によれば、 赤外線カメラ、 赤外線発光装置及びシャッター 同期発光駆動装置をコールドミラーの裏面側のミラーケース内に配設する構成を 採用し、 さらに赤外線発光装置は、 シャッター同期発光駆動装置により赤外線力 メラのシャッタ一動作と同期して発光動作を行うような構成を採用したので、 次 に示す効果が生じる。  According to the present invention as described above, the infrared camera, the infrared light emitting device, and the shutter synchronous light emission driving device are arranged in the mirror case on the back side of the cold mirror. Since the driving device adopts a configuration in which the light emission operation is performed in synchronization with the shutter operation of the infrared camera, the following effects are produced.
( 1 ) 被写体である運転者、 同乗者に、 赤外線カメラや赤外線発光装置の存在 を意識することなく、 何等違和感を与えることがない。 又、 赤外線発光装置から の照射光についても眩しさを感じることがなく、しかもエネルギー消費も少ない。  (1) The driver or passenger, who is the subject, does not feel any discomfort without being aware of the existence of an infrared camera or infrared light emitting device. Also, the illumination light from the infrared light emitting device does not feel glare and consumes little energy.
( 2 ) 外乱光による影響が少なく、 被写体の細かい動作について鮮明かつ正確 な安定した撮影画像が得られ、 画像処理した場合にノイズの少ない、 正確なパタ ーン認識を可能とする画像情報を提供することができる。  (2) Providing image information that is less affected by disturbance light, provides clear, accurate and stable captured images of fine movements of the subject, and reduces noise when processing images, enabling accurate pattern recognition. can do.
( 3 ) 通常のミラーと しての反射能力を低下させることがない。 産業上の利用可能性  (3) The reflection ability as a normal mirror is not reduced. Industrial applicability
本発明は、 以上のような構成及び効果を有するから、 本発明に係るカメラ内蔵 ミラー装置は、 ミラーケース内に赤外線カメラを内蔵したカメラ内蔵ミラー装置、 特に、 自動車の運転手や同乗者をモニタするための車両用カメラ内蔵ミラー装置 に適している。 Since the present invention has the above configuration and effects, the camera built-in according to the present invention The mirror device is suitable for a camera built-in mirror device having a built-in infrared camera in a mirror case, particularly a vehicle camera mirror device for monitoring a driver of a car or a passenger.

Claims

請 求 の 範 囲 The scope of the claims
1 . ミラーケースに装着されたコールドミラーを有し、 赤外線発光装置で発光し た近赤外から赤外域の光を、上記コールドミラーを通して車内の被写体に照射し、 その反射光を上記コールドミラーを通して近赤外から赤外域の光を受光して撮影 可能な赤外線カメラで撮影する車両用カメラ内蔵ミラ一装置であって、 1. It has a cold mirror mounted on the mirror case, irradiates the near-infrared to infrared light emitted by the infrared light emitting device to the subject in the vehicle through the cold mirror, and reflects the reflected light through the cold mirror. A mirror device with a built-in camera for a vehicle, which receives light in the near-infrared to infrared region and shoots with an infrared camera capable of shooting.
上記赤外線力メラ及び赤外線発光装置は、 上記コールドミラーの裏面側におい て上記ミラーケース内に配設されていることを特徴とする車両用カメラ内蔵ミラ 一装置。  The mirror device with a built-in camera for a vehicle, wherein the infrared light mercury and the infrared light emitting device are disposed in the mirror case on the back side of the cold mirror.
2 . ミラーケースに装着されたコールドミラーを有し、 赤外線発光装置で発光し た近赤外から赤外域の光を、上記コールドミラーを通して車内の被写体に照射し、 その反射光を上記コールドミラ一を通して近赤外から赤外域の光を受光して撮影 可能な赤外線カメラで撮影する車両用カメラ内蔵ミラー装置であって、  2. It has a cold mirror mounted on the mirror case, irradiates the near-infrared to infrared light emitted by the infrared light emitting device to the subject in the vehicle through the cold mirror, and reflects the reflected light to the cold mirror. A mirror device with a built-in camera for a vehicle that receives light in the near-infrared to infrared region through an infrared camera that can capture the light.
上記赤外線発光装置は、 シャッター同期発光駆動装置によ り赤外線カメラのシ ャッター動作と同期して間欠発光動作を行うものであり、  The infrared light emitting device performs an intermittent light emitting operation in synchronization with a shutter operation of an infrared camera by a shutter synchronous light emitting driving device.
上記赤外線カメラ、 赤外線発光装置及びシャッター同期発光駆動装置は、 上記 コールドミラーの裏面側において上記ミラーケース内に配設されていることを特 徴とする車両用カメラ内蔵ミラー装置。  A mirror device with a built-in camera for a vehicle, wherein the infrared camera, the infrared light emitting device, and the shutter synchronous light emission driving device are disposed in the mirror case on the back side of the cold mirror.
3 . 上記コールドミラーは、 透明ガラス板の片面に S i O 2薄膜と T i O 2薄膜を 多層にコーティングして成る多層機能膜であることを特徴とする請求項 1又は 2 記載の車両用カメラ内蔵ミラー装置。 3. The vehicle according to claim 1, wherein the cold mirror is a multilayer functional film formed by coating a transparent glass plate on one side with a SiO 2 thin film and a TiO 2 thin film in multiple layers. Mirror device with built-in camera.
4 . 上記コールドミラーは、 自動車の車内のバック ミラ一と して利用されるもの であることを特徴とする請求項 1、 2又は 3記載の車両用カメラ内蔵ミラー装置。 4. The mirror device with a built-in camera for a vehicle according to claim 1, 2, or 3, wherein the cold mirror is used as a back mirror in a vehicle.
5 . 上記赤外線カメラは、 赤外線デジタルカメラであり、 撮影した画像信号を、 画像情報と して画像処理装置におけるパターン認識に供することを特徴とする請 求項 1、 2又は 3記載の車両用カメラ内蔵ミラー装置。 5. The vehicle camera according to claim 1, 2 or 3, wherein the infrared camera is an infrared digital camera, and the captured image signal is used as pattern information in an image processing device for pattern recognition. Built-in mirror device.
6 . 上記カメラのシャッターは、 1 0〜 6 0秒に 1回の間隔でシャ ツタ一動作を 行い、 そのシャツター速度は 1 2 5 0〜 1 1 0 0 0 0 0秒に設定されるもの であることを特徴とする請求項 1 、 2又は 3記載の車両用カメラ内蔵ミラー装置。  6. The shutter of the above camera performs shutter operation once every 10 to 60 seconds, and the shutter speed is set to 1250 to 1100 seconds. 4. The mirror device with a built-in camera for a vehicle according to claim 1, 2 or 3, wherein:
PCT/JP2002/003478 2001-04-24 2002-04-05 Camera-built-in mirror device WO2002090148A1 (en)

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