JP2001313850A - On-vehicle near-infrared irradiation photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an on-vehicle near-infrared irradiation photographing device that can prevent the halation of a near-infrared camera of its own vehicle due to a near infrared ray, emitted by a vehicle traveling in the opposite direction. SOLUTION: The on-vehicle near-infrared irradiation photographing device 1A as one embodiment of this invention consists of a near infrared lamp section 10, provided with a near infrared lamp 11, a polarizer 12 placed on the optical axis and in front of the near infrared ray lamp 11 and with a first polarizer unit 13, placed on the optical axis and in front of the polarizer 12; and a near infrared camera section 20 provided with a near infrared camera 21, an analyzer 22 that is placed on the optical axis and in front of the near-infrared camera 21 and a second polarizer unit 23 placed on the optical axis and in front of the analyzer 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle near-infrared radiation photographing apparatus capable of illuminating the front with near-infrared light of a near-infrared lamp and projecting with a high-sensitivity near-infrared camera at night or when driving in a car. More particularly, the present invention relates to an in-vehicle near-infrared irradiation imaging apparatus capable of preventing halation due to near-infrared light emitted from an oncoming vehicle.

[0002]

2. Description of the Related Art A near-infrared radiation photographing device (for vehicle mounting) comprising a 50-60 W near-infrared lamp and a high-sensitivity near-infrared camera is attached to a vehicle, and the near-infrared radiation emitted from the near-infrared lamp is leveled. In the direction (same direction as the high beam of the car), illuminate the front of the traveling own vehicle and project it on the display device with the high-sensitivity near-infrared camera, it is possible to grasp the situation ahead more than seen by the naked eye. it can.

[0003]

However, when the oncoming vehicle also uses the same near-infrared ray irradiation and photographing apparatus as the own vehicle, the near-infrared lamp and the near-infrared camera are not provided with any mechanism. Then, the near-infrared rays emitted by the oncoming vehicle directly enter the near-infrared camera of the own vehicle, causing halation. This is similar to a situation in which a pedestrian loses sight of a pedestrian due to the dazzlingness of the normal headlights of an oncoming vehicle, and the effect of near-infrared rays visible to the naked eye cannot be sufficiently obtained.

An object of the present invention is to solve such a problem, and an in-vehicle near-infrared radiation photographing apparatus capable of preventing halation of a near-infrared camera of the own vehicle due to near-infrared light emitted by an oncoming vehicle. The purpose is to obtain.

[0005]

Therefore, according to the first aspect of the present invention, a near-infrared ray irradiation photographing apparatus for vehicle is provided on a near-infrared lamp and an optical axis in front of the near-infrared lamp. A near-infrared lamp section provided with a polarizer, an optical axis in front of the polarizer and having a first polarizing device, a near-infrared camera, and a near-infrared camera disposed on an optical axis in front of the near-infrared camera; And an analyzer arranged on the optical axis in front of the analyzer,
A near-infrared camera unit equipped with a polarizing device,
The above problem has been solved.

According to the second aspect of the present invention, the vehicle-mounted near-infrared irradiation imaging apparatus according to the first aspect is configured such that the polarization axis of the polarizer and the polarization axis of the analyzer can be changed in conjunction with each other. Means is provided.

Further, in the invention according to claim 3,
The first polarizing device and the second polarizing device of the near-infrared radiation imaging apparatus for mounting on a vehicle are provided with a polarization axis adjusting unit capable of finely adjusting the respective polarization axes.

Further, in the invention according to claim 4, a near-infrared radiation photographing apparatus for mounting on a vehicle is provided with a near-infrared lamp and a polarizer disposed on an optical axis in front of the near-infrared lamp. An infrared lamp section, a near-infrared camera section including a near-infrared camera and an analyzer disposed on an optical axis in front of the near-infrared camera, and the polarizer and the analyzer rotated in conjunction with the polarizer and the analyzer The above-mentioned problem is solved by comprising a rotating means for causing the rotation.

Further, according to the present invention, a near-infrared lamp and a polarizer disposed on an optical axis in front of the near-infrared lamp and the polarizer and the polarizer are provided. A near-infrared lamp unit provided with an optical axis in front of the camera and having a first polarizing device capable of changing the polarization axis, a near-infrared camera, and an analyzer provided on the optical axis in front of the near-infrared camera And arranged on the optical axis in front of the analyzer,
A near-infrared camera unit having a second polarization device capable of changing the polarization axis, a rotation unit for rotating the polarization axis of the polarizer, and a polarization axis adjustment for rotating and adjusting the polarization axis of the second polarization device The above-mentioned problem is solved by being configured with a device.

Further, according to the present invention, a near-infrared lamp and a polarizer disposed on an optical axis in front of the near-infrared lamp and the near-infrared lamp are provided. A near-infrared lamp unit provided with an optical axis in front of the camera and having a first polarizing device capable of changing the polarization axis, a near-infrared camera, and an analyzer provided on the optical axis in front of the near-infrared camera And arranged on the optical axis in front of the analyzer,
A near-infrared camera unit having a second polarizing device capable of changing the polarizing axis, a polarizing axis adjusting device for rotating and adjusting the polarizing axis of the first polarizing device, and a rotating device for rotating the polarizing axis of the analyzer The above-mentioned subject is solved by comprising from means.

Further, according to a seventh aspect of the present invention, the first polarizing device and the second polarizing device of the near-infrared radiation photographing apparatus for mounting on a vehicle according to the first, fifth, and sixth aspects are Faraday. The above problem is solved by configuring a polarizing device that can rotate the polarization axis of near-infrared rays by the effect.

Therefore, according to the near-infrared radiation imaging apparatus of the present invention, the polarization axes of the polarizer and the analyzer can be rotated to a desired polarization axis individually or in conjunction with each other. It is also possible to further adjust the near-infrared light of the own vehicle having a predetermined polarization axis that has passed through the polarizer to a desired polarization axis with a polarization axis adjusting device. The polarization axis can be adjusted by the polarization axis adjustment device to match the polarization axis of the analyzer, so that the occurrence of halation due to near-infrared light of oncoming vehicles can be prevented with the highest probability, and the near-infrared lamp unit and near-infrared camera Even if the mounting position in the vehicle with the part is far, the polarization axis of the polarization device can be electrically adjusted, and if the polarization device is configured by a member that can adjust the polarization axis by the Faraday effect, transmission light Loss can be suppressed to a minimum,
In addition, electronic control can be performed, and it is possible to cope with future ITS concept technology.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An on-vehicle near-infrared radiation photographing apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing the construction of a near-infrared radiation photographing apparatus for use in a vehicle according to a first embodiment of the present invention. FIG. 2 is an explanatory view showing an example of a near-infrared polarization axis radiated by an oncoming vehicle.
FIG. 4 is a block diagram showing the configuration of a near-infrared radiation imaging apparatus for mounting on a vehicle according to a second embodiment of the present invention. FIG. 4 is a diagram showing two examples of near-infrared polarization axes radiated by an oncoming vehicle. The third
FIG. 6 is a configuration block diagram of a near-infrared radiation imaging apparatus for mounting on a vehicle according to the embodiment, and FIG. 6 is a configuration block diagram of a near-infrared irradiation imaging apparatus for mounting on a vehicle according to a fourth embodiment of the present invention.

First, the configuration and operation of a near-infrared radiation photographing apparatus for mounting on a vehicle according to a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1A indicates a near-infrared radiation photographing apparatus for mounting on a vehicle. This in-vehicle near-infrared irradiation imaging apparatus 1A includes a near-infrared lamp unit 10A and a near-infrared camera unit 2A.
0A. Further, the near-infrared lamp unit 1
0A denotes a near-infrared lamp 11, a polarizer 12 disposed on the optical axis in front of the near-infrared lamp 11, and the polarizer 12
And a first polarizing device 13 which is disposed on the optical axis in front of the camera and can change the polarization axis.
A denotes a near-infrared camera 21, an analyzer 22 disposed on the optical axis in front of the near-infrared camera 21, and the analyzer 22.
And a second polarizing device 23 that is disposed on the optical axis in front of the optical axis and can change the polarization axis.

The polarization direction of the polarizer 12 is, for example, a vertical direction, and the polarization direction of the analyzer 22 is, for example, a horizontal direction.

In this embodiment, the first polarizer 13 is used.
Is composed of a lead glass 131 and a polarization axis adjusting device 132 including a coil for flowing a current through the lead glass 131. The direction and strength of the magnetic field H are determined by the direction and strength of the current flowing through the coil. In this embodiment, the polarization axis of near-infrared light passing through the lead glass 131 can be varied by the Faraday effect. In this embodiment, for example, the near-infrared polarized light component rotates 45 degrees to the left. Is set in advance as follows. Similarly, the second polarizing device 23 also includes a lead glass 231 and a polarization axis adjusting device 232 including a coil for flowing a current through the lead glass 231. The magnetic field is determined by the direction and strength of the current flowing through the coil. This device is capable of changing the direction and intensity of generation of H and controlling the polarization axis of near-infrared light passing through the lead glass 231 by the Faraday effect by this control. Is set in advance so as to rotate 45 degrees.

Next, the operation of the in-vehicle near-infrared irradiation imaging apparatus 1A of this embodiment will be described. Since the polarization direction of the polarizer 12 disposed in front of the near-infrared lamp 11 is the vertical direction, the polarization component at point A in FIG. 1 is <1>.
This polarized light component passes through the lead glass 131, but the polarization axis is rotated 45 degrees to the left due to the Faraday effect, and the polarized light component in FIG.
The polarization component at the point is <2>.

Since the polarization axis of the near-infrared light emitted from the own vehicle rotates by 45 degrees in this way, the polarization component of the near-infrared light reflected on the object also becomes <2> (point C). When this polarized light component passes through the lead glass 231 disposed in front of the near-infrared camera 21, the polarization axis is further polarized to the left by 45 degrees due to the Faraday effect. As a result, the polarization component at point D in FIG. 1 is <3>. Since the polarization direction of the analyzer 22 is the horizontal direction, the polarization components <3> match, and the polarization component <3> passes through the analyzer 22.

In this case, when the polarized light component <2> hits the object, the reflected polarized light component <2> may actually have its polarization axis slightly rotated. It is preferable to set the polarization axis of the device 23 to a polarization axis slightly different from the polarization axis of the first polarization device 13 so that reflected light of the polarization component <3> can be obtained. This is because when the second polarizing device 23 is formed of a member using the Faraday effect,
This can be realized by finely adjusting the current flowing through the coil of the second polarizing device 23.

Next, referring to FIG. 2, it will be described that near-infrared rays emitted from an oncoming vehicle are cut off and do not enter the near-infrared camera 21 of the own vehicle. Assuming that the polarization component of the near-infrared light emitted from the oncoming vehicle is <4>, when this polarization component passes through the lead glass 231, the polarization axis rotates 45 degrees to the left due to the Faraday effect. Becomes <5>. Since this polarization component is orthogonal to the polarization direction (lateral direction) of the analyzer 22, the polarization component <5> can be cut off by the analyzer 22.

As described above, the construction of the near-infrared radiation photographing apparatus 1A for a vehicle according to the present invention makes it possible to prevent the occurrence of halation even when an oncoming vehicle using the same near-infrared radiation photographing apparatus for a vehicle comes. Generation can be prevented.

If the polarization axis of the near-infrared light emitted from the oncoming vehicle happens to coincide with that of the near-infrared light of the own vehicle, halation occurs. In such a case, the occurrence and occurrence of halation are instantaneously detected to control the direction and intensity of the current flowing through the coils of the first polarizing device 13 and the second polarizing device 23, and the polarization axis is controlled by the Faraday effect. Is changed, the occurrence of halation can be reduced. Since the rotation angle of the polarization axis due to the Faraday effect is proportional to the strength of the magnetic field, the direction of the polarization axis and the rotation angle can be changed by changing the current flowing through the coil.

As a method for preventing the occurrence of halation, an ITS (Intelligent) which is currently under study is being studied.
This can be solved by using the technology of the Transportation System concept. In the ITS concept technology, vehicles can communicate with each other and exchange information. In this communication information, the rotation angle data of the near-infrared polarization axis of the near-infrared irradiation imaging device of each vehicle is entered. For example, A
Car (master) and car B (slave) run opposite each other,
The rotation angles of the polarization axes of both vehicles are the same. Then, when communication is established between the two vehicles, it is known that the rotation angles of the polarization axes of the two vehicles are the same, and vehicle B on the slave side rotates the polarization axis by 90 degrees. With this function, the polarization axes of both vehicles are shifted by 90 degrees, so that the occurrence of halation at the time of opposition can be prevented.

As means for rotating the polarization axis, there is a TN liquid crystal in addition to a polarization device using the Faraday effect. In the case of a polarizer using the Faraday effect, since lead glass is used, the transmittance is close to 100%, whereas the transmittance of the TN liquid crystal is about 50%. Therefore, it is more advantageous to use a polarizing device that uses the Faraday effect because loss of transmitted light can be minimized.

In general, the position where the near-infrared lamp section 10A and the near-infrared camera section 20A are attached to the vehicle is different. The near-infrared lamp section 10A is attached to, for example, a front grille section, and the near-infrared camera section 20A is attached to, for example, a room mirror section. In the case where the two polarizers are separated from each other, if the polarizer using the Faraday effect is used, the first polarizer 13 and the second polarizer 23 are used.
Can easily be electrically controlled by the current flowing through the coil. Therefore, there is no restriction on the place where the near-infrared lamp unit 10A and the near-infrared camera unit 20A are attached. From this point of view, it is very useful to mount the near-infrared radiation imaging apparatus 1A for mounting on a vehicle according to the first embodiment in a vehicle.

The use of the near-infrared radiation photographing apparatus 1A for mounting on a vehicle according to the first embodiment can prevent occurrence of halation due to near-infrared light of an oncoming vehicle with the highest probability. If the above-mentioned ITS concept technology can be used in combination, the following modified near-infrared irradiation imaging apparatus for vehicle use is also useful.

First, the configuration and operation of a near-infrared radiation photographing apparatus 1B for vehicle mounting according to a second embodiment of the present invention will be described with reference to FIGS. The same components as those of the in-vehicle near-infrared irradiation imaging apparatus 1A will be described with the same reference numerals.

This near-infrared radiation photographing apparatus 1B for a vehicle comprises:
A near-infrared lamp unit 10B including a near-infrared lamp 11 and a polarizer 12 disposed on the optical axis in front of the near-infrared lamp 11, a near-infrared camera 21, and an optical axis in front of the near-infrared camera 21 A near-infrared camera section 20B having an analyzer 22 disposed thereon, a polarizer 12 and an analyzer 22;
And a rotating means 30 for rotating the apparatus in conjunction with the vehicle.
The first polarizer 13 and the second polarizer 23 which are incorporated in are excluded. Then, the polarization directions of the polarizer 12 and the analyzer 22 are set, for example, in the vertical direction, and both are connected by a mechanical connection member, and the connection member is, for example,
It is configured so that it can be turned by a turning means 30 such as a pulse motor.

Even in the vehicle-mounted near-infrared radiation imaging apparatus 1B having such a configuration, if the polarization direction of the polarizer 12 is set to the vertical direction, the polarization component of the near-infrared ray passing therethrough at the point A in FIG. 1>. The near-infrared ray of the polarized light component strikes the object, is reflected, and the near-infrared ray at point B incident on the analyzer 22 also has a polarization component of <1>, and the polarization direction of the analyzer 22 is also a vertical direction. <1> coincides and passes through the analyzer 22.

Next, as shown in FIG.
If near-infrared light is radiated from an oncoming vehicle, the polarization component enters the analyzer 22 and crosses the polarization direction (vertical direction) of the analyzer 22, so that the polarization component <4> is Blocked by 22.

As described above, the on-vehicle near-infrared ray irradiation photographing apparatus 1B of the present invention is constituted so that the on-vehicle near-infrared ray irradiation photographing apparatus different from the on-vehicle near-infrared ray irradiation photographing apparatus 1B of the own vehicle can be used. When the vehicle comes, the near-infrared camera 21 of the own vehicle does not cause halation with the near-infrared light emitted by the oncoming vehicle, but the oncoming vehicle using the same near-infrared irradiation imaging apparatus 1B as the own vehicle is used. If it comes, the near-infrared polarized light component emitted by the oncoming vehicle will be <1>
Therefore, occurrence of halation cannot be prevented in the in-vehicle near-infrared irradiation imaging apparatus 1B of this embodiment. However, in such a case, the above-described halation can be prevented by controlling the illustrated rotation unit 30 and rotating and controlling the polarization axes of the polarizer 12 and the analyzer 22. Also, as a mechanical connection means,
For example, if the polarizer 12 and the analyzer 22 are connected to each other using a wire, even if the near-infrared lamp unit 10B and the near-infrared camera unit 20B are arranged separately inside and outside the vehicle, the polarizer 12 In addition, the polarization axis of the analyzer 22 can be easily rotated and controlled.

Next, the configuration of a near-infrared radiation photographing apparatus 1C for mounting on a vehicle according to a third embodiment of the present invention will be described with reference to FIG. In this case, the near-infrared radiation photographing apparatus 1 is also used in the vehicle.
The same components as those of A will be described with the same reference numerals.

The structure of the near-infrared radiation photographing apparatus 1C according to the first embodiment is similar to that of the near-infrared radiation photographing apparatus 1A according to the first embodiment.
The near-infrared lamp unit 10C includes a near-infrared lamp 11, a polarizer 12 disposed on an optical axis in front of the near-infrared lamp 11, and an optical axis in front of the polarizer 12. First polarizing device 13 disposed and capable of changing polarization axis
The near-infrared camera unit 20C includes the near-infrared camera 2
1, an analyzer 22 disposed on the optical axis in front of the near-infrared camera 21 and a second polarizing device 23 disposed on the optical axis in front of the analyzer and capable of changing the polarization axis. Only the polarizer 12 is provided with a rotation means 40 whose rotation angle is variable, and the second polarization device 23 is provided with a polarization axis adjustment device 232 capable of adjusting its polarization component.

Accordingly, in the near-infrared radiation photographing apparatus 1C for a vehicle, the polarizer 12 on the near-infrared lamp section 10C can change the polarization component of the near-infrared ray, and the near-infrared camera section 20C.
Since the C-side second polarization device 23 is configured to change the polarization component of near-infrared light, if the polarization component of the polarizer 12 is set in advance in accordance with the polarization axis of the analyzer 22,
The near-infrared rays emitted by the own vehicle and reflected upon the object can be received, and the near-infrared rays of the oncoming vehicle can be almost blocked. Even if the near-infrared camera section 20C is installed outside the vehicle, the second polarizing device 23 can be adjusted by the polarization axis adjusting device 232 as needed.

The components of the near-infrared radiation imaging apparatus 1D for mounting on a vehicle according to the fourth embodiment shown in FIG. 6 are the same as those of the near-infrared irradiation imaging apparatus 1C for mounting on a vehicle, but are different from those of the near-infrared irradiation imaging apparatus 1C for mounting on a vehicle. The point is that the polarization axis adjusting device 132 is provided on the first polarization device 13 so that its polarization axis can be adjusted, and the rotation means 40 can be attached to the polarizer 22 to rotate its polarization axis. This is the point configured.

In the case of the near-infrared radiation photographing apparatus 1D for use in a vehicle, usually, the polarization axis of the first polarizer 13 of the near-infrared lamp unit 10D attached to the front grill portion can be electrically and remotely adjusted. Near infrared lamp unit 10
Since the polarization axis of the first polarization device 13 on the D side can change the polarization component of the near-infrared ray and the analyzer 22 on the near-infrared camera section 20D can rotate, the analyzer 2
Polarizer 12 and first polarizer 13 according to the two polarization axes
If the polarization axis is set in advance, it is possible to receive near-infrared light that the own vehicle irradiates and irradiates an object and reflects the near-infrared light of the oncoming vehicle.

[0039]

As described above, according to the near-infrared radiation photographing apparatus for vehicle use of the present invention, occurrence of halation can be prevented with a very high probability. In particular, by using a member utilizing the Faraday effect as the polarizing device, electrical control can be performed, and the degree of freedom of the installation location of the near-infrared lamp unit and the near-infrared camera unit can be increased. Also, if the polarizing device of the near-infrared lamp unit and the near-infrared camera unit is configured with a polarizing member that can be electrically controlled,
The ITS concept technology can be introduced, and even if halation occurs, the halation can be instantaneously electronically resolved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a near-infrared radiation imaging apparatus for mounting on a vehicle according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an example of a polarization axis of near-infrared light emitted by an oncoming vehicle.

FIG. 3 is a block diagram illustrating a configuration of a near-infrared radiation imaging apparatus for mounting on a vehicle according to a second embodiment of the present invention.

FIG. 4 is a diagram showing an example of two types of near-infrared polarization axes emitted by an oncoming vehicle.

FIG. 5 is a block diagram illustrating a configuration of a near-infrared radiation imaging apparatus for mounting on a vehicle according to a third embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of a near-infrared radiation imaging apparatus for mounting on a vehicle according to a fourth embodiment of the present invention.

[Explanation of symbols]

1A: Near-infrared radiation imaging apparatus for mounting on a vehicle according to the first embodiment of the present invention, 1B: Near-infrared radiation imaging apparatus for mounting on a vehicle according to a second embodiment of the present invention, 1C: Near infrared ray for mounting on a vehicle according to a third embodiment of the present invention Irradiation photographing apparatus, 1D: near-infrared irradiation photographing apparatus for vehicle mounted in the fourth embodiment of the present invention, 10A: near-infrared lamp unit,
11: near infrared lamp, 12: polarizer, 13: first polarizer, 131: lead glass, 20A: near infrared camera unit,
21 ... Near infrared camera, 22 ... Analyzer, 23 ... Second polarizer, 231 ... Lead glass, 30, 40 ... Rotating means

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Claims (7)

[Claims] 1. A near-infrared lamp comprising a near-infrared lamp, a polarizer disposed on an optical axis in front of the near-infrared lamp, and a first polarizer disposed on an optical axis in front of the polarizer. A lamp portion, a near-infrared camera, an analyzer disposed on an optical axis in front of the near-infrared camera, and an analyzer disposed on an optical axis in front of the analyzer,
An in-vehicle near-infrared irradiation imaging apparatus, comprising: a near-infrared camera unit including a second polarizing device. 2. The near-infrared radiation photographing apparatus for mounting on a vehicle according to claim 1, further comprising a rotating unit that can change the polarization axis of the polarizer and the polarization axis of the analyzer in an interlocked manner. . 3. The in-vehicle near-infrared radiation imaging apparatus according to claim 1, wherein the first polarizing device and the second polarizing device each include a polarization axis adjusting unit that can finely adjust the respective polarization axes. apparatus. 4. A near-infrared lamp section including a near-infrared lamp and a polarizer disposed on an optical axis in front of the near-infrared lamp, a near-infrared camera, and an optical axis in front of the near-infrared camera. An in-vehicle near-infrared radiation photographing apparatus, comprising: a near-infrared camera unit including an analyzer disposed in the apparatus; and a rotating unit that rotates the polarizer and the analyzer in conjunction with each other. 5. A near-infrared lamp, a polarizer disposed on an optical axis in front of the near-infrared lamp, and a first polarizer disposed on the optical axis in front of the polarizer and capable of changing the polarization axis. A near-infrared lamp section comprising: a near-infrared camera, an analyzer disposed on an optical axis in front of the near-infrared camera, and an analyzer disposed on an optical axis in front of the analyzer,
A near-infrared camera unit having a second polarizing device capable of changing a polarizing axis; a rotating unit for rotating the polarizing axis of the polarizer; and a polarizing axis adjustment for rotating and adjusting the polarizing axis of the second polarizing device. An in-vehicle near-infrared irradiation imaging device configured with a device. 6. A near-infrared lamp, a polarizer disposed on an optical axis in front of the near-infrared lamp, and a first polarizer disposed on the optical axis in front of the polarizer and capable of changing the polarization axis. A near-infrared lamp section comprising: a near-infrared camera, an analyzer disposed on an optical axis in front of the near-infrared camera, and an analyzer disposed on an optical axis in front of the analyzer,
A near-infrared camera unit having a second polarization device capable of changing the polarization axis; a polarization axis adjustment device for rotating and adjusting the polarization axis of the first polarization device; and a rotation unit for rotating the polarization axis of the analyzer. An in-vehicle near-infrared irradiation imaging device comprising: 7. The polarizing device according to claim 1, wherein the first polarizing device and the second polarizing device are polarizing devices that can rotate a polarization axis of near-infrared light by Faraday effect. Near-infrared irradiation imaging equipment for vehicle.