JP2004087428A - Infrared illumination light source for vehicle night vision device and power supply circuit of vehicle night vision device - Google Patents

Abstract

An infrared illumination light source for a night vision device for a vehicle, which can be manufactured easily and inexpensively.
A vehicle night vision device that receives a reflected light beam from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared illumination light source for a vehicle night vision device, which is mounted on a reflector 11 and emits light having a wavelength ranging from at least a visible region to an infrared region, and is integrally connected to the reflector 11 A light projecting lens 14 mounted on the housing 13 for condensing a light beam emitted from the bulb 12 and projecting the light forward of the vehicle, and is present between the bulb 12 and the light projecting lens 14 and emitted from the bulb 12. A visible light cut filter 16 is provided for cutting light having a wavelength in the visible light region of the light flux and transmitting light having a wavelength in the infrared region to illuminate the front of the vehicle with infrared light.
[Selection diagram] Fig. 4

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle night vision system in which a reflected light flux from an object in front of a vehicle illuminated by infrared light is received by a camera mounted on the vehicle, and an object in front of the vehicle is imaged and displayed on a monitor mounted on the vehicle. The present invention relates to an infrared illuminating light source for a vehicle night vision device and a power supply circuit of the vehicle night vision device used in the device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vehicle headlamp for illuminating the front of a vehicle body with an illumination light beam having a predetermined light distribution pattern at night or the like is installed in a vehicle.
[0003]
By the way, such a vehicle headlight always illuminates the vicinity of the vehicle body (so-called low beam illumination), and when it is necessary to check an obstacle or the like distant from the vehicle body, temporarily switches the switch at hand to distant the vehicle body. Light distribution is regulated to prevent dazzling of oncoming vehicles and the like, such as enabling illumination (so-called high beam illumination).
[0004]
[Problems to be solved by the invention]
However, this type of conventional vehicle headlamp has a problem in that it is necessary to switch from low-beam illumination to high-beam illumination when the user wants to see a distant place, and this switching operation is cumbersome.
[0005]
Therefore, a night vision system for vehicles that captures far-infrared rays using a far-infrared camera, converts the captured images into images, and displays them on a monitor has been considered. However, night vision systems for vehicles that use far-infrared cameras are very expensive. In addition, there is a problem that a clear image cannot be obtained.
[0006]
Therefore, using an infrared light source, an object in front of the vehicle is illuminated with infrared light, and infrared reflected light from the object in front of the vehicle is received by a camera mounted on the vehicle, and the image is received by a monitor mounted on the vehicle. A vehicle night vision device that images and displays an object in front of the vehicle is being proposed, but in order to make the infrared illumination light source cheap and easy to manufacture, a structure using an existing bulb for high beam illumination and Then, since the high-beam illumination bulb is applied with a higher voltage than the low-beam illumination bulb, that is, the battery voltage (12 volts) as it is, and the infrared illumination light source is in a low-beam state after the headlamp switch is turned on. Since the configuration is used without switching between illumination and high beam illumination, the life may be shorter than that of the bulb for low beam illumination. The frequency of replacement of the increases, also caused a problem that undesirable.
[0007]
The present invention has been made in view of the above problems, and a first object of the present invention is to receive an image of a reflected light beam from an object in front of a vehicle illuminated with infrared light by a photographing camera mounted on the vehicle and apply the image to a vehicle. An infrared light source for a vehicle night-vision device suitable for use in a vehicle night-vision device for imaging and displaying an object in front of the vehicle on an on-board monitor. An external illumination light source is provided.
[0008]
A second object of the present invention is to provide a power supply circuit of a vehicle night vision device that can extend the life of a bulb used for an infrared illumination light source.
[0009]
[Means for Solving the Problems]
The infrared illuminating light source for a vehicle night vision device according to claim 1, receives a reflected luminous flux from an object in front of the vehicle illuminated by infrared light with a photographing camera mounted on the vehicle, and outputs the image to a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device used for a vehicle night vision device that images and displays an object in front of the vehicle, and is mounted on a reflector and emits light having a wavelength ranging from at least a visible region to an infrared region. A bulb, a light-emitting lens attached to a housing integrally connected to the reflector, and a light-projecting lens for condensing a light beam emitted from the valve and projecting the light forward of the vehicle; and between the bulb and the light-projecting lens. A visible light cut filter that is present and cuts light having a wavelength in the visible light region of the light flux and transmits light having a wavelength in the infrared region to illuminate the front of the vehicle with infrared light. It is characterized by.
[0010]
According to a second aspect of the present invention, in the infrared light source for a night vision device for a vehicle, the visible light cut filter is formed of a multilayer film deposited on a back surface of the condenser lens.
[0011]
An infrared light source for a vehicle night vision device according to claim 3, wherein the reflected light flux from an object in front of the vehicle illuminated by the infrared light is received by a photographing camera mounted on the vehicle, and is received by a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device used for a vehicle night vision device that images and displays an object in front of the vehicle, and is mounted on a reflector and emits light having a wavelength ranging from at least a visible region to an infrared region. A bulb, a light-emitting lens attached to a housing integrally connected to the reflector, and a light-projecting lens for condensing a light beam emitted from the valve and projecting the light forward of the vehicle; and between the bulb and the light-projecting lens. A visible light cut filter that is present and is formed so that light in the infrared wavelength region is emitted toward the high beam equivalent region and light in the visible light wavelength region is emitted toward the low beam equivalent region. And it features.
[0012]
The infrared light source for a vehicle night vision device according to claim 4, wherein the visible light filter has a semi-circular shape, and is colored at a boundary surface that transmits light in an infrared region and cuts light in a visible light region. An optical member for prevention is provided.
[0013]
An infrared light source for a night vision device for a vehicle according to claim 5, wherein the reflected light beam from an object in front of the vehicle illuminated by the infrared light is received by a camera mounted on the vehicle, and is received by a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device used in a vehicle night vision device for imaging and displaying an object in front of the vehicle, and a reflector installed in a housing, and installed at least coaxially with the reflector from at least a visible region. A bulb that emits light having a wavelength in the infrared region, and is provided to surround the bulb, cuts visible light, transmits infrared light, guides the light to the reflector, and illuminates the front of the vehicle with infrared light. And a visible light cut-off filter.
[0014]
An infrared illumination light source for a night vision device for a vehicle according to the present invention is characterized in that the visible light cut filter is formed in a cylindrical shape and a cap for cutting at least visible light is provided on a top portion thereof.
[0015]
The infrared light source for a vehicle night vision device according to claim 7, wherein the reflected light flux from an object in front of the vehicle illuminated by the infrared light is received by a photographing camera mounted on the vehicle, and is received by a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device used in a vehicle night vision device for imaging and displaying an object in front of the vehicle, and a reflector installed in a housing, and installed at least coaxially with the reflector from at least a visible region. A bulb that emits light having a wavelength in the infrared region, and is provided in front of the bulb to cut visible light, transmit infrared light, guide the light to the reflector, and illuminate the front of the vehicle with infrared light. And a visible light cut filter.
[0016]
The infrared light source for a vehicle night vision device according to claim 8, wherein the reflected light flux from an object in front of the vehicle illuminated by the infrared light is received by a photographing camera mounted on the vehicle, and is received by a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device used in a vehicle night vision device for imaging and displaying an object in front of the vehicle, and a reflector installed in a housing, and installed at least coaxially with the reflector from at least a visible region. A bulb that emits light having a wavelength in the infrared region, and a light that is provided so as to surround the bulb, is irradiated with light in the infrared wavelength region toward a high-beam equivalent region, and light in the visible light wavelength region is a low-beam equivalent region. And a visible light cut filter formed so as to be radiated toward the light source.
[0017]
An infrared illumination light source for a vehicle night vision device according to a ninth aspect is characterized in that the visible light cut filter functions as a shade.
[0018]
The power supply circuit of the vehicle night vision device according to claim 10, wherein the power supply circuit receives a reflected light beam from an object in front of the vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and forwards the reflected light beam to a monitor mounted on the vehicle. To display an image of the object,
A bulb that emits light having a wavelength ranging from at least the visible region to the infrared region, a reflector that is provided in the housing and reflects the light emitted from the bulb toward the front of the vehicle, and a light that is emitted from the bulb. An infrared illumination light source having a visible light cut filter for cutting light having a wavelength in the light region and transmitting light in the infrared wavelength region to illuminate the front of the vehicle with infrared light; and applying a voltage to the bulb. And a voltage regulating circuit for lowering the battery voltage and applying a voltage to the valve.
[0019]
The power supply circuit for a night vision device for a vehicle according to claim 11, wherein a voltage applied to the valve is in a range from 10 volts to 11 volts.
[0020]
The power supply circuit for a vehicle night vision device according to claim 12, wherein the infrared illumination light source is provided with a light projecting lens for projecting the infrared light toward a high beam equivalent region in the housing. And
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of an infrared illumination light source for a vehicle night vision device and a power supply circuit of the vehicle night vision device according to the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a schematic view of a vehicle 1 equipped with a vehicle night vision device according to the present invention. The vehicle 1 is provided with a headlight 2 at the front of the vehicle. The headlight 2 includes a high beam light source 2A, a low beam light source 2B, and a vehicle night vision device infrared illumination light source 2C, and the vehicle night vision device infrared illumination light source 2C is provided near the center of the vehicle. .
[0022]
As shown in FIGS. 1 and 2, a commercially available photographing camera 3 having sensitivity from a visible region to an infrared region is provided in a rear-view mirror portion in front of a driver's seat inside the vehicle. A controller 4 is provided inside the vehicle. The controller 4 receives a vehicle speed signal from a vehicle speed sensor 5 and a steering angle signal from a steering angle sensor 6 as shown in FIG. An image signal is being input.
[0023]
The controller 4 has an image processing unit 7, which processes an image signal from the photographing camera 3 and outputs the processed image signal to a display (monitor) 8 installed in front of a driver's seat inside the vehicle. An image from the photographing camera 3 is displayed on the (monitor) 8. Further, the controller 4 outputs a warning signal to the speaker 9 and the indicator 10 as appropriate.
[0024]
For example, the controller 4 can change the direction of the operation camera 3 based on signals from the vehicle speed sensor 5 and the steering angle sensor 6. Further, the controller 4 can use a warning notifying unit such as the speaker 9 or the indicator 10 to notify, for example, that a person is present ahead, so that the burden on the driver to look at the monitor can be reduced.
[0025]
As shown in FIGS. 4 and 5, the infrared illumination light source 2C includes a reflector 11, a halogen bulb 12, and a cylindrical housing 13. As shown in FIG. 6, the halogen bulb 12 has an illumination characteristic Q1 over a wavelength region from the ultraviolet region to the infrared region, and emits illumination light from the ultraviolet region to the infrared region. The photographing camera 3 has a sensitivity characteristic Q2 ranging from a visible light wavelength region to an infrared wavelength region. The housing 13 is constituted by a cylindrical body 13b having a holding flange plate portion 13a. A hemispherical light projecting lens 14 is attached to the tip of the cylindrical body 13b by an annular clip member 15. A disc-shaped filter 16 is provided between the reflector 11 and the housing 13.
[0026]
The reflector 11 has a sandwiching flange plate portion 11a facing the sandwiching flange plate portion 13a around the reflector. The halogen bulb 12 is supported by the reflector 11, and the reflector 11 and the housing 13 are detachably connected by a plurality of clip members 17. The filter 16 is clamped and fixed between the clamping flange plate portions 11a and 13a by the clip member 17. Reference numeral 18 denotes a packing member interposed between the filter 16 and the reflector 11. In FIG. 5, the illustration of the packing member 18 is omitted.
[0027]
The filter 16 has a transmission characteristic Q3 for cutting light in a visible light wavelength region and transmitting light in an infrared wavelength region. The filter 16 may be made of, for example, a glass substrate on which a multilayer film that reflects visible light is formed, or a material that absorbs visible light (such as cadmium, arsenic, or lead). Etc.) may be used.
[0028]
A voltage is applied to the halogen bulb 12 via a power supply circuit 30, as shown in FIG. The power supply circuit 30 includes a battery E, a headlamp switch S, and a voltage adjustment circuit (regulator) 31.
[0029]
The voltage adjustment circuit 31 reduces the voltage of the battery E by 12 volts and applies a voltage of 10 volts to 11 volts to the halogen bulb 12.
[0030]
According to the infrared light source 2C for the vehicle night-vision device of this embodiment, a so-called high beam equivalent region in front of the vehicle is illuminated with infrared light, and an infrared reflected light beam from an object in front of the vehicle is photographed on the vehicle 1. The image is received by the camera 3 and an object in front of the vehicle is imaged and displayed on a monitor 8 mounted on the vehicle 1, so that a clearer image can be obtained as compared with a vehicle night vision device that captures images using a far-infrared camera.
[0031]
Further, the infrared light source 2C for a vehicle night vision device can be easily manufactured by appropriately changing the design of a part of the conventional headlight and cutting the glass substrate into a required shape to easily produce the filter 16. The production cost is also low.
[0032]
Furthermore, since the infrared light source 2C for a night vision device for a vehicle can be easily disassembled by removing the clip member 17, even when the immersion glass is used as the filter 16, the collection is easy and from the viewpoint of environmental conservation. Is also desirable.
[0033]
Further, according to the power supply circuit of the vehicle night vision device, the voltage to be applied to the halogen bulb 12 when irradiating infrared light toward the high beam equivalent region by the infrared illuminating light source 2 </ b> C is set at the time of high beam illuminating with visible light. Since the voltage is set to be lower than the conventional voltage of 12 volts to be applied to the halogen bulb, the life can be extended even when an existing halogen bulb is used as a bulb for infrared illumination. The life of the halogen bulb 12 is desirably equivalent to the life of the halogen bulb during low beam illumination.
[0034]
7 and 8 show modifications of the infrared light source 2C for the vehicle night vision device shown in FIGS. 4 and 5, and the infrared light source 2C for the vehicle night vision device shown in FIGS. A filter 16 having a small diameter enough to close the opening of the reflection surface 11b of the reflector 11 is attached to the sandwiching flange plate 11a of the reflector 11, and the remaining structure is shown in FIGS. Since it is substantially the same as the infrared light source 2C for a vehicle night vision device shown in the drawings, the same components are denoted by the same reference numerals and the detailed description thereof will be omitted.
[0035]
9 and 10 show still another modification of the infrared light source 2C for the vehicle night vision device shown in FIGS. 4 and 5. In this modification, a disc-shaped Since the remaining configuration is substantially the same as the infrared illuminating light source 2C for a vehicle night-vision device shown in FIGS. 4 and 5, the same components are denoted by the same reference numerals. The detailed description is omitted.
[0036]
FIG. 11 shows still another modification of the infrared light source 2C for a night vision device for a vehicle shown in FIG. 4. In this modification, a multilayer film is formed by vapor deposition on the back side of the light projecting lens 14, and A filter 16 that cuts visible light and transmits infrared light is formed by a film. According to this filter, a dedicated disk-shaped filter 16 shown in FIGS. Since the infrared light can be irradiated without disposing between the reflector and the reflector 11, the assembling can be further simplified as compared with the configuration shown in FIGS.
(Embodiment 2)
FIGS. 12 and 13 are explanatory views of the second embodiment of the invention of an infrared illumination light source 2C for a vehicle night vision device. Here, a semicircular hole 16a as a transmission window for transmitting visible light to a filter 16 is shown. Is provided. Other configurations are substantially the same as those of the infrared light source 2C for the vehicle night vision device shown in FIGS. 4 and 5, and therefore, the same components are denoted by the same reference numerals, and only different points will be described.
[0037]
The disc-shaped filter 16 is assembled between the reflector 11 and the housing 13 such that the semicircular hole 16a is on the upper side, and is emitted from the halogen bulb 12 and has a substantially upper half reflecting surface 11b of the reflector 11. The luminous flux P1 reflected by the light source is guided to the light projecting lens 14 through the semicircular hole 16a, and the light projecting lens 14 illuminates the low beam equivalent area in front of the vehicle with visible light. The light beam P2 emitted from the halogen bulb 12 and reflected by the reflecting surface 11b in the lower half of the reflector 11 is guided to the visible light cut portion 16b of the filter 16, and the visible light is cut by the visible light cut portion 16b of the filter 16. The light in the region is cut, and the light in the infrared wavelength region is guided to the light projecting lens 14, and the light projecting lens 14 illuminates the high beam equivalent region ahead of the vehicle with infrared light.
[0038]
Therefore, according to the second embodiment of the present invention, when the headlamp switch (not shown) is turned on, the low beam equivalent area is illuminated by visible light, and the high beam equivalent area is illuminated by infrared light, so that it is also used as a headlight. be able to.
[0039]
14 and 15 show a filter 16 having a semi-disc shape instead of the filter 16 shown in FIGS. 12 and 13, and the other configuration is substantially the same as the configuration shown in FIGS. Therefore, the same components are denoted by the same reference numerals.
[0040]
By the way, if the filter 16 has a semi-circular configuration as described above, if the thickness of the boundary surface (cut surface) 16c that cuts visible light and allows infrared light to pass through is small, the filter 16 has a relation of refractive power. When a rainbow pattern is formed and the infrared light source 2C for a vehicle night vision device is viewed from the front with the naked eye, the light projecting lens 14 appears colored.
[0041]
Therefore, the modified examples shown in FIGS. 16 and 17 have a configuration in which a U-shaped coloring prevention optical member 19 for thickening the boundary surface portion 16c is fitted to the boundary surface portion 16c. According to the configurations shown in FIGS. 16 and 17, even when the low beam equivalent region is illuminated with visible light and the high beam equivalent region is illuminated with infrared light using the semicircular filter 16, projection is performed. It is possible to prevent the optical lens 14 from appearing colored.
[0042]
The modification shown in FIGS. 18 and 19 has a configuration in which a semi-circular filter 16 is attached to the back surface of the light projecting lens 14.
[0043]
In the second embodiment of the present invention, the filter 16 is formed in a semi-disc shape so that the low beam equivalent region is illuminated with visible light and the high beam equivalent region is illuminated with infrared light. The transmission window 16d is formed in a plate shape at a position corresponding to the low beam equivalent region of the filter 16 as shown by a virtual line as shown in FIG. 5, and allows visible light to pass when irradiating visible light. A portion other than the transmission window 16d may be configured to perform a shade function of blocking visible light.
(Embodiment 3)
FIG. 20 is an explanatory diagram of an embodiment of the invention of the infrared illuminating light source 2C for a vehicle night vision device according to the present invention.
[0044]
20, reference numeral 20 denotes a lamp housing, 21 denotes an outer lens, 22 denotes a reflector, 23 denotes a halogen bulb, and 24 denotes a lamp room. The halogen bulb 23 is held on the lamp housing 20 via a bracket 25. The reflector 22 is held on the lamp housing 20 via a bracket (not shown). A cylindrical filter 26 is attached to the reflector 22 via a bracket 27. The filter 26 is arranged coaxially with the optical axis O of the reflector 22 in the lamp room 24 so as to surround the halogen bulb 23. The filter 26 has a top 26a.
[0045]
The filter 26 cuts light in the visible light wavelength region and transmits light in the infrared wavelength region. Part of the infrared light emitted from the halogen bulb 23 and transmitted through the peripheral portion 26c of the filter 26 is a reflector. The infrared light reflected by the filter 22 and passing through the outer lens 21 illuminates the front of the vehicle, and the infrared light emitted from the halogen bulb 23 and passing through the top 26a of the filter 26 passes directly through the outer lens 21 and passes through the front of the vehicle. Light up.
[0046]
Here, the top portion 26a of the filter 26 is configured to also have a filter function. However, the top portion 26a may be formed from a cup-shaped filter member as shown in FIG. 21 or a cap as shown in FIG. It may be formed from a filter member.
[0047]
Further, in the fourth embodiment of the present invention, the cylindrical filter 26 is provided so as to surround the halogen bulb 23, but as shown in FIG. The filter 26 may be arranged on the reflector 22.
[0048]
With any of the infrared light sources 2C for night vision devices, for example, a high beam equivalent region in front of the vehicle can be illuminated with infrared light.
(Embodiment 4)
FIG. 24 is an explanatory diagram of Embodiment 4 of the invention of the infrared illuminating light source 2C for a vehicle night vision device. Here, the filter 26 is a semicircular cylinder. Other configurations are the same as those of the infrared light source 2C for a vehicle night vision device shown in FIG. 20, and therefore, the same components will be denoted by the same reference characters, and only different points will be described.
[0049]
The semicircular cylindrical filter 26 is provided with a visible light passage cutout 26b at a peripheral portion 26c, and is held by the reflector 22 with the visible light passage cutout 26b facing upward. The visible light flux P1 emitted from the halogen bulb 23, passed through the visible light passage cutout 26b, and reflected on the reflection surface 22a of the upper half of the reflector 22 is guided to the outer lens 21 and passes through the outer lens 21. Thus, the low beam equivalent region in front of the vehicle is illuminated with visible light. Further, the infrared light beam P2 emitted from the halogen bulb 23 and passing through the peripheral portion 26c of the filter 26 is reflected by the reflecting surface 22a of substantially the lower half of the reflector 22 and guided to the outer lens 21. Then, the high beam equivalent area is illuminated with infrared light. Embodiment 4 of the present invention has the same effect as Embodiment 2 of the present invention.
[0050]
Further, in Embodiment 4 of the present invention, when irradiating a region corresponding to a low beam with visible light, the peripheral portion 26c functions as a kind of shade for cutting visible light.
[0051]
Here, the filter 26 has a configuration in which the top 26a also has a filter function. However, the top 26a may be formed from a cup-shaped filter member as shown in FIG. 25, or a cap as shown in FIG. It may be formed from a filter member.
[0052]
Further, in the fourth embodiment of the present invention, the semi-cylindrical filter 26 is provided so as to surround the halogen bulb 23. However, as shown in FIG. 27, the lower half of the opening of the reflector 22 is closed. A configuration in which a semi-circular filter 26 is disposed on the reflector 22 may be employed.
[0053]
As described above, according to the first to fourth embodiments of the present invention, according to the present invention, the infrared illumination light source 2C for the vehicle night-vision device can be used without significantly changing the structure of the existing vehicle headlamp. Since it can be manufactured, its manufacturing cost is low and its manufacture is easy.
[0054]
The power supply circuit of the vehicle night vision device of the present invention can be applied to the infrared light source for the vehicle night vision device described in the second to fourth embodiments of the invention.
[0055]
【The invention's effect】
Since the infrared light source for a vehicle night vision device according to the present invention is configured as described above, the reflected light flux from an object in front of the vehicle illuminated by the infrared light is received by a photographing camera mounted on the vehicle. An infrared illuminating light source for a vehicle night vision device suitable for use in a vehicle night vision device for imaging and displaying an object in front of the vehicle on a monitor mounted on the vehicle, and which is inexpensive and easily manufactured. An infrared illumination light source can be provided.
[0056]
In particular, according to the infrared illuminating light source for a night vision device for a vehicle according to the third and eighth aspects, it is possible to use the low beam illuminating and the infrared illuminating together.
[0057]
According to the power supply circuit of the night vision system for a vehicle according to the tenth to twelfth aspects, even when the bulb is used as an infrared illumination light source, the life thereof can be extended.
[Brief description of the drawings]
FIG. 1 is a front view of a vehicle equipped with a vehicle night vision device according to the present invention.
FIG. 2 is a side view of a vehicle equipped with the vehicle night vision device according to the present invention.
FIG. 3 shows a block circuit diagram of a vehicle night vision device according to the present invention.
FIG. 4 is a diagram showing an infrared illumination light source for a vehicle night vision device and a power supply circuit of the vehicle night vision device according to Embodiment 1 of the present invention.
FIG. 5 is an exploded perspective view of the infrared illumination light source for the vehicle night vision device shown in FIG. 4;
FIG. 6 is a characteristic diagram for explaining illumination characteristics of a halogen bulb, sensitivity characteristics of a photographing camera, and transmission characteristics of a filter according to the present invention.
FIG. 7 is a vertical sectional view of an infrared illumination light source for a night vision device of a vehicle according to a modification of the first embodiment of the present invention.
FIG. 8 is an exploded perspective view of the infrared light source for the vehicle night vision device shown in FIG. 7;
FIG. 9 is a longitudinal sectional view showing another modified example of the infrared illumination light source for the night vision device for a vehicle according to the first embodiment of the present invention.
FIG. 10 is an exploded perspective view of the infrared illumination light source for the vehicle night vision device shown in FIG.
FIG. 11 is a vertical sectional view of the infrared illumination light source for a night vision device for a vehicle according to the first embodiment of the present invention.
FIG. 12 is a longitudinal sectional view of an infrared illumination light source for a night vision device for a vehicle according to a second embodiment of the present invention.
FIG. 13 is an exploded perspective view of the infrared illumination light source for the vehicle night vision device shown in FIG.
FIG. 14 is a longitudinal sectional view showing a modified example of the infrared illumination light source for the vehicle night vision device shown in FIG.
FIG. 15 is an exploded perspective view of the infrared light source for the vehicle night vision device shown in FIG. 14;
16 is a longitudinal sectional view of the infrared illumination light source for the night vision device for a vehicle shown in FIG.
17 is an exploded perspective view of the infrared light source for the vehicle night vision device shown in FIG. 16;
FIG. 18 is a longitudinal sectional view showing another modified example of the infrared illumination light source for the vehicle night vision device shown in FIG.
19 is an exploded perspective view of the infrared illuminating light source for the vehicle night vision device shown in FIG.
FIG. 20 is a longitudinal sectional view of an infrared illumination light source for a vehicle night-vision device according to Embodiment 3 of the present invention.
21 is a longitudinal sectional view showing a modification of the infrared light source for the night vision device for a vehicle shown in FIG. 20.
FIG. 22 is a longitudinal sectional view showing another modified example of the infrared light source for the vehicle night vision device shown in FIG. 20.
FIG. 23 is a cross-sectional view showing still another modified example of the infrared light source for a night vision device for a vehicle shown in FIG. 20;
FIG. 24 is a longitudinal sectional view of an infrared illumination light source for a night vision device for a vehicle according to Embodiment 4 of the present invention.
25 is a longitudinal sectional view showing a modification of the infrared light source for the night vision device shown in FIG. 24.
26 is a longitudinal sectional view showing another modification of the infrared illumination light source for the vehicle night vision device shown in FIG. 24.
FIG. 27 is a longitudinal sectional view showing still another modified example of the infrared illumination light source for the vehicle night vision device shown in FIG. 24.
[Explanation of symbols]
11 ... Reflector
12 ... Valve
13 ... Housing
14 ... Floodlight lens
16 ... Visible light cut filter

Claims (12)

It is used in a vehicle night vision device that receives a reflected light flux from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device,
A bulb mounted on the reflector to emit light having a wavelength ranging from at least the visible region to the infrared region, and a light beam emitted from the bulb mounted on the housing integrally connected to the reflector to collect the light in front of the vehicle. A light projecting lens for projecting light, and a light present between the bulb and the light projecting lens, which cuts light having a wavelength in a visible light region and transmits light having a wavelength in an infrared region in the light flux, and emits red light. An infrared illumination light source for a night vision device for a vehicle, comprising: a visible light cut filter for illuminating the front of the vehicle with external light. The infrared illumination light source for a night vision device for a vehicle according to claim 1, wherein the visible light cut filter is formed by a multilayer film deposited on a back surface of the condenser lens. It is used in a vehicle night vision device that receives a reflected light flux from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device,
A bulb mounted on the reflector to emit light having a wavelength ranging from at least the visible region to the infrared region, and a light beam emitted from the bulb mounted on the housing integrally connected to the reflector to collect the light in front of the vehicle. A light projecting lens, and a light beam in an infrared wavelength region, which is present between the bulb and the light projecting lens, is irradiated toward a high beam equivalent region and light in a visible light wavelength region is emitted to a low beam equivalent region. An infrared illumination light source for a night vision device for a vehicle, comprising: a visible light cut filter formed so as to be radiated toward the vehicle. 4. The color filter according to claim 3, wherein the visible light filter has a semi-circular shape, and an optical member for preventing coloring is provided on a boundary surface that transmits light in an infrared region and cuts light in a visible light region. 3. An infrared illumination light source for a vehicle night vision device according to claim 1. It is used in a vehicle night vision device that receives a reflected light flux from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device,
A reflector installed in the housing, a valve that is installed coaxially with the reflector and emits light having a wavelength ranging from at least the visible region to the infrared region, and is provided to surround the valve to cut visible light and An infrared light source for a night vision device for a vehicle, comprising: a visible light cut filter for transmitting infrared light, guiding the infrared light to the reflector, and illuminating the front of the vehicle with the infrared light. The infrared illumination light source for a vehicle night vision device according to claim 5, wherein the visible light cut filter has a cylindrical shape and a cap for cutting at least visible light is provided on a top portion thereof. It is used in a vehicle night vision device that receives a reflected light flux from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device,
A reflector installed in the housing, a valve installed coaxially with the reflector to emit light having a wavelength ranging from at least a visible region to an infrared region, and a visible light cut and infrared light provided in front of the bulb and provided therewith. An infrared illumination light source for a night vision device for a vehicle, comprising: a visible light cut filter for transmitting light, guiding the light to the reflector, and illuminating the front of the vehicle with infrared light. It is used in a vehicle night vision device that receives a reflected light flux from an object in front of a vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and images and displays the object in front of the vehicle on a monitor mounted on the vehicle. An infrared light source for a vehicle night vision device,
A reflector installed in the housing, a bulb installed coaxially with the reflector and emitting light having a wavelength ranging from at least the visible region to the infrared region, and a light in the infrared wavelength region provided to surround the bulb. A visible light cut filter formed so that light is emitted toward a high beam equivalent region and light in a visible light wavelength region is emitted toward a low beam equivalent region. Infrared illumination light source. The infrared illumination light source of claim 8, wherein the visible light cut filter functions as a shade. A power supply circuit of a vehicle night vision device for receiving a reflected light beam from an object in front of the vehicle illuminated by infrared light with a photographing camera mounted on the vehicle and imaging and displaying the object in front of the vehicle on a monitor mounted on the vehicle And
A bulb that emits light having a wavelength ranging from at least the visible region to the infrared region, a reflector that is provided in the housing and reflects light emitted from the bulb toward the front of the vehicle, and a light that is emitted from the bulb. An infrared illumination light source having a visible light cut filter for cutting light having a wavelength in the light region and transmitting light in the infrared wavelength region to illuminate the front of the vehicle with infrared light; and applying a voltage to the bulb. A power supply circuit for reducing the battery voltage and applying a voltage to the valve by applying a voltage to the valve. The power supply circuit of claim 10, wherein the voltage applied to the valve is in a range of 10 volts to 11 volts. The power supply circuit for a vehicle night vision device according to claim 10, wherein the infrared illumination light source is provided with a light projecting lens for projecting the infrared light toward a high beam equivalent region on the housing. .

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