JPS6190125A - Monitor device - Google Patents

Abstract

PURPOSE:To obtain color information which has a light external field by connecting an objective system and an ocular system through a pipe which incorporates fiber bundles and an objective system, and allowing the neck of the objective system to swing. CONSTITUTION:The monitor device consists of the objective 1, fiber bundles 2 and 6, and ocular system 7, and the pipe 5 which incorporates the objective system 4 is provided in their middle; and those are connected on the same axis and the objective 1 is controlled remotely to swing.

Description

[Detailed Description of the Invention] This invention is applicable when a bonnet-type vehicle, that is, a vehicle with the driver's seat located behind the engine (general passenger cars are generally bonnet-type), stops at an intersection or leaves the garage. It is an inexpensive, simple, and useful monitoring device for checking the safety of the right and left sides, or checking the presence and location of roadside ditches when exiting.
Although it is rare to find a suitable monitoring device that is lightweight, requires a small installation space, is built into the body, and can obtain bright color information about the outside world, a model that combines two mirrors has been commercialized. However, it was installed at the top of the bonnet tip, which caused it to be easily damaged due to the inappropriate installation location, making it difficult to see during rain, and impairing the fan-like appearance of modern vehicles, which hindered its practical use. was.

Until now, although there was no suitable device for this purpose, the frequency of so-called ``accidents'' when turning left or right at intersections or when exiting a parking lot is statistically low. Therefore, this invention eliminates the above-mentioned drawbacks and
7-Action property of modern vehicles is not impaired at all, but in fact it adds value in terms of design.It is a built-in type that is tightly attached to the POD, raindrops do not interfere with rain, it is not damaged except in a head-on collision, it is inexpensive, lightweight, and The purpose of the present invention is to provide a simple monitoring device that requires little installation space, has uniform brightness throughout the screen, and can provide bright color information about the outside world.

An embodiment in which the present invention is applied to a monitoring device for a general passenger car will be described based on the drawings.

The lens system (2) has a front end surface that is connected to the first objective lens system (
It coincides with and is connected to the focal plane of 1), and its rear end surface is connected to a straight light-shielding and protective tube (hereinafter simply referred to as tube), and the rear end surface is connected to the focal plane of the first objective lens system α). A flexible first fiber bundle of about 50 fibers that fixes the optical axis in any direction and bends and transmits the external image to the tube (5); (4) H exit side is telecentric; The second objective lens system (6) has its front end surface connected to the second objective lens system (4).
) coincides with and is connected to the focal plane of the eyepiece system (7), the rear end surface coincides with and is connected to the focal plane of the eyepiece system (7),
For example, from inside the external image of the bonnet, you can see the dash board (9
), and the monitoring point (8) is located at any position.
A flexible second fiber bundle of about 60 mm is used to completely fix the eyepiece system (7) at the most visible position (eye position). 00) is the engine part.

The first objective lens system (1) used for this purpose must be telecentric on its exit side in order to transmit the entire brightest external image to the first fiber bundle (2). There are, for example, "gastric cameras"
For example, in the outside world (it is desirable to have a large aperture), on the other hand, the effective angle of incidence of general optical fibers is about 60
degree (the exit angle is also the same), but due to its unique angular characteristics, the brightness of the emitted light decreases dramatically when the incident angle exceeds about 50 degrees. It has no effect. In other words, when used for the purpose of the present invention, the field of view ID (incident angle) of the first objective lens system (1) is almost impossible unless it poses a practical problem. This is the peculiarity of the transmitted peak surface.

That is, NA = Sin (50'/2) Therefore, if the aperture ratio of the first objective lens system (1) is F, then F =
1.0 out of 1.07.

In addition, in a lens system with a general refractive system configuration, the brightness of the image plane becomes dark according to the CO3'θ law when the incident angle is 20 degrees, but if the incident angle is 50 degrees, the brightness of the image plane becomes CO8' (5
0°/2) = 0.675, that is, the brightness at the corners of the image plane is about 68 inches from the center, which is within the limit of seeing with the naked eye that the brightness is approximately uniform all the way to the corners of the image plane. . Also, by a simple experiment, the aperture k F = 1.0 of the first pair lens system (1)
As you stop down further, it starts to feel dark at F2, about 7-1.6, and at F=2, it becomes quite difficult to see the details of 2ξ1', but headlights can be clearly seen even at night. Therefore, 2) F is required for the aperture ratio of the first objective lens system α) in the present invention, and 1) there is no effect even if it is set to F. Therefore, it is preferable that the temperature should be about 1.0 in 1.4≧F throughout the day and night.

As mentioned above, it was concluded that the effective angle of incidence of the first objective lens system (1) is approximately 50 degrees, but the size of the fiber bundle cannot be increased too much due to the cost of the fiber bundle. For a fixed bundle size, the angle of incidence f! : If the angle is 50 degrees or more, the first objective lens system (1
) becomes smaller and smaller, the amount of information on the screen becomes excessive, and it becomes difficult to distinguish between them.At the same time, the perspective of the external world image is different from that of the visual sense, and in this sense, the incident It is better not to make the corners too large.

The above objective lens system (1) is a general refractive system configuration, but the brightness of the image plane seen in many fisheye lenses is close to uniform brightness over the entire screen. However, in this case, the external world @ is different from a normal visual image and will be unfamiliar to you, but if you apply appropriate processing such as applying a fisheye lens and cutting off the field of view above the horizontal, you can, for example, see the intersection point. In such cases, it has the advantage of being able to monitor the left side, right side, and the ground (gutter) at the same time. However, although the aberration correction is not as severe as on the left, there is a drawback in that it is generally difficult to manufacture a small, lightweight, and inexpensive fisheye lens with an F = 1.0 or so.

FIGS. 2 and 3 show an embodiment in which the monitoring device shown in FIG. 1 of the present invention is attached to a bonnet-type automobile, and the direction of the optical axis of the first objective lens system (1) when the automobile stops at an intersection. FIG. 2 is a plan view and a side view for explaining the FIG.

The first objective lens system (1) shall be installed near the top of the escutcheon at the center of the front of the Pode, and this point is designated as 1o.
When the center line of the road where the car is stopped is xox', and the car side of the intersecting road is iYOY',
The effective angle of incidence of the first objective lens system (1) is 50 degrees.If YOZ=50 degrees and its bisector is OP, then the optical axis of the first objective lens system (1) is OP. When aligned with the optical axis tray OP of the objective lens system α), the right side can be monitored from infinity to the near point A. The average value of 00' depending on the vehicle type is about 60, so it is 0 in 7 in O'A, and generally there is no problem with safe driving, but if you want to bring the periapsis closer, you can change the depression angle of OP. You can make it slightly larger.

That is, the optical axis opl center line xo of the first objective lens system (1)
If we give <X0P=65° and a depression angle (YOP=25°) to the right/horizontal direction with respect to x', we can monitor the right side without having to move the bonnet into the stop line.

Next, through manual operation, OP is set to the plane x with O as the rotation center.
To the left [130
If you rotate it once, you can monitor the left side in the same way.

As mentioned above, if all fisheye lenses are applied, left, right, and
Information on the ground or gutters can be obtained on the same screen, but the amount of information is too dense, so after the object has completed monitoring in the left direction, it will automatically restore to the right direction monitoring posture.

Here, the optical axis oP of the first objective lens system (1) is the plane POQ.
It is a planar movement inside, and the front side can be visually observed, so the front side is decorated with a decorative board that also serves as a design, and the OP, O
Assuming that the field of view of Q is weather-resistant with a transparent cover, even if raindrops adhere to the transparent cover during rain, the surface to which it adheres is close to the first objective lens system (1), so It can be monitored without any trouble.

The reason for this is the same as the reason why you can see outside through the blinds, but it is difficult to see inside from the outside, and the same reason why the two rear view mirrors are generally useless when it rains.

Next, the first fiber bundle (2) is bent and attached along the back side of the rough grid-like front escutcheon to the light-shielding tube (5) attached to the side of the body inside the bonnet. The area around the bundle (2) should be made of straight pipes with low thermal conductivity so as not to be affected by engine heating, and should be covered with heat insulating material if necessary.

A second objective lens system (4) is completely built into the interior of the optical fiber bundle, whereby the external world image transmitted to the end face of the first fiber bundle (2) is relayed to the second fiber bundle (6). Straightness is required, and the length varies slightly depending on the type of car, but it is about 100 to 120 mm long. FIG. 5 is an enlarged cross-sectional side view of the end face of the first fiber bundle (2) opposite to the first objective lens system (1), and the end face has the first objective lens system (1) on the side opposite to the first objective lens system (1).
The external image formed in step 1) is transmitted, but since the exit side of the first objective lens system (1) is telecentric, the exit angle of the light beam that constitutes each image point of this end face image is different from the incident light. Not only are they equally 50 degrees, but their chief rays are all parallel to the optical axis, and in the rays emitted from this blood removal,
These principal ray groups and minute beams of light in the vicinity of each principal ray are only components with the highest light intensity. Here, the relay projection magnification of the second objective lens system (4) is completely arbitrary, but if the second objective lens system (4) is a completely symmetrical type with a total magnification of 1X, F, F', the first and second Fiber bundle (2)
, (6) (7) Let the effective radius be CD and C'D, respectively.
' If then, OF = OF' = CF = C'
F'Also, CD = C'D', the first and second fiber bundles (2), (6) U are the same -! In addition, the rays passing through the focal point Fi in the rays emitted from each image point on the end surface of the first fiber bundle (2) shown in FIG. ) are all parallel to the optical axis, and the second fiber bundle (
6), but these rays are involved in the formation of the end face image.
Each image point of the end face image of the fiber bundle (6) can be regarded as the principal ray of the entire light beam.

Therefore, the completely symmetrical second objective lens system (4) with equal magnification is
The injection side has a telecenter) IJ sock and can be relayed to the No. 1 bundle (6). In this case, it is necessary to provide a plurality of apertures.

It is easiest to see from the monitoring point (8) on the top of the second fiber board (9), which is illuminated by the bright outside world.
' - The length may be about 60 mm, and the first. 2nd fiber
If the bundles (2) and (6) Th are left in their natural state without twisting, the image of the outside world will be an erect image on both the left, right, top and bottom, and the monitoring point (8
) can be observed. However, the portion of the second fiber bundle (6) until it completely comes out of the engine compartment is covered with a flexible heat insulating material.

8r! Figure 7 shows the monitoring device shown in Figure 1 of the present invention in which the first fiber bundle (2) is omitted and the window glass α is
This shows an embodiment in which a υ1 reversing mirror 02 and a restoring mirror (13) are added, and a window glass αυ is installed close to the body on the left side of the front side of the body of a flat-throated automobile, near the left side marker lamp. Since the effective angle of incidence of the first objective lens system α) is 50 degrees, in order to secure the angle of incidence 1zr to the left from the OY axis as shown in Figure 2, a reversing mirror is used as shown in the figure. 02 is fixed at 147.5 degrees with respect to the optical axis of the first objective lens system α) and attached to the first objective lens system (1), the light shielding tube (5) does not necessarily need to be attached horizontally. Since the second fiber bundle (6) is twisted and the exit side of the first objective lens system (1) is a telecentric lens, the light beams constituting each image point on the sea surface are End view of fiber bundle? Since the constituent light fluxes, their chief rays, and the minute light fluxes in their vicinity are all equidistant, as explained above, the color information, which is the normal image of the bright external image in the right direction, is +4.
1 will be given. In many cases, if information can be confirmed in the right direction, checking in the left direction can be done visually, but if monitoring in the left direction is also necessary, a monitoring device similar to the one shown in Figure 7 should be added to the front right side of the body. Bye. In addition, in the case of a general passenger car, it is easier to see if the distance between the eyepiece system (7) and the monitoring point (8) is about 40 mm on average, so the theoretical magnification of the eyepiece system (7) It is better not to be too high so that an unnecessary enlarged image of the optical fiber diameter cannot be seen.

Furthermore, in FIGS. 1 and 7, the first objective lens (1)
(!: A monitoring device can be made by directly connecting the +11 lun system (7) with a gold or fiber cable, but in that case the length will be approximately 230 mm (Fig. 1) to 180 mm (Fig. 7) With a length of this length, it is highly practical that it also serves as a measure near the engine.

The effective exit angle from the end face of the first fiber bundle (2) in FIG. 5 is 50 degrees as described above, but the light-shielding tube (
5) In order not to make it too thick, the effective angle of incidence on the second objective lens system (4) is a small angle, which causes a large loss, but the light beam within that small angle is only the component with the highest light intensity in the emitted light beam. Therefore, it is possible to sufficiently relay bright external color information within monitorable limits.

Furthermore, in order to make all of the effective total emitted light flux from this end surface enter the second objective lens system (4), theoretically, the size of each of them must be the same as the fiber diameter and completely match the fiber arrangement. There is no other way than to place the so-called "microscopic fly's eye lenses" in close contact with the end face, and even if one set of condensing lens systems is installed close to the end face and approximately all of the emitted and scattered light is controlled, In order to relay the brighter outer world troops, no great effect was obtained.

As explained above, in this invention, a straight tube containing a set of second objective lens systems is provided between the first objective lens system and the eyepiece system, and this and the fiber bundle are connected to each other. This first objective lens system and an eyepiece system connected to the fiber bundle and containing a restoration mirror are connected by a set of straight tubes containing a second objective lens system, All of these monitoring devices are installed on the same optical axis, require only a small installation space, are difficult to damage except in the event of a head-on collision, and are lightweight, simple, and inexpensive built-in devices that are built into the body and do not pose a sense of danger to pedestrians. The fashionability of modern vehicles is not compromised at all, and bonnet-type cars can check the safety of turning to the right and left without going beyond the stop line at intersections, etc., and can be used for frequently parking cars. It has the effect of preventing unnecessary accidents.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the monitoring device of the present invention, and FIGS. 2 and 3 are plan views explaining the light II (1+ direction) of the first objective lens system in the embodiment of the monitoring device in FIG. 4 is a front view of the divided field of view, and FIG. 5 is a rear end surface of the first fiber bundle. , 4.・
... second objective lens system, 5. ...Light shielding and protection tube, 6
．． . . . second fiber bundle, 7. . . eyepiece system, 8. ...Monitoring point, 9. ...Datsushu board. 10. Engine part, 11. ...window glass, 12
．． ...Reversing mirror, 13. ...Restored mirror.

Claims (1)

[Claims] 1. Objective lens system (1) Fiber bundle (2) and fiber bundle (6), Eyepiece system (7)
In a monitoring device consisting of
A monitoring device characterized in that a tube (5) containing a lens system (4) is provided, all of these are connected coaxially, and the head of an objective lens system (1) can be swung by remote control. 2. Applying a fisheye lens instead of objective lens system (1),
2. The monitoring device according to claim 1, wherein the optical axis is fixed forward. 3. It consists of a window glass (11) provided close to the front thereof, an objective lens system (1) connected to a reversing mirror (12), and an eyepiece system (7) containing a restoring mirror (13), 2. Monitoring device according to claim 1, characterized in that the fiber bundle (2) is omitted. 4. Claim 3, characterized in that the window glass (11) and the reversing mirror (12) are replaced with one prism.
Monitoring device as described in Section. 5. The monitoring device according to claims 1, 2, 3, and 4, characterized in that plastic lenses, mirrors, prisms, and optical fibers are used. 6. Claims 1, 2, and 3 satisfy the condition 2.0≧F, where F is the aperture ratio of the objective lens system (1) or the fisheye lens.
The monitoring device according to Items 4 and 5. 7. Claims 1, 2, 3, 4, 5, and 6, characterized in that a symmetric objective lens system (4) with a projection magnification of 1X is provided. Monitoring device as described in Section. 8. Objective lens system (1) or fiber bundle (2)
) Claims 1, 2, 3, and 4, characterized in that a condensing lens system is provided close to the image plane of the invention.
The monitoring device according to clauses 5, 6 and 7. 9. Objective lens system whose exit side is telecentric (1
), (4), or any one of the following:
The monitoring device according to paragraphs 5, 6, 7 and 8. 10. Claims 1, 2, and 2, characterized in that a plurality of prisms or mirrors and an objective lens system (4) are provided inside the tube (5), and the optical path is bent the same number of times. The monitoring device according to item 3, item 4, item 5, item 6, item 7, item 8, and item 9. 11. Claim 1, characterized in that the objective lens system (4) or the prism or mirror is omitted, and the objective lens system (1) and the eyepiece system (7) are directly connected by a fiber bundle. Section 2, Section 3, Section 4, Section 5,
The monitoring device according to paragraphs 6, 7, 9 and 10.