JPS58193513A - Monitor camera - Google Patents

Abstract

PURPOSE:To make the up-down direction of a TV monitor screen coincident with that of a picture projected on the monitor screen by setting the angle of clockwise angle of rotation around the vertical axis of the 1st plane mirror twice as great as the angle of counterclockwise rotation around the horizontal axis of a trapezoid prism. CONSTITUTION:The trapezoid prism 6 for correcting the inclination of images of a vertical body 4 projected on a rotating mirror 2 and a fixed mirror 5 is arranged between an ITV camera 1 and the fixed mirror 5 for reflecting light reflected by the rotating mirror 2 toward the ITV camera 1. Then, the angle of inclination of the image projected on the fixed mirror 4 is denoted as gamma3 and the trapezoid prism 6 is rotated by (gamma3)/2 in the opposite direction to said inclination to obtain the image whose inclination is corrected when viewed from the ITV camera side 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention combines an industrial TV (ITV) camera and a reflector to capture the surrounding area. Regarding improvements to surveillance cameras.

Conventionally, when observing the surroundings with an ITV camera, the direction of observation was selected by using a backing fund and pointing the ITV camera in the direction of observation. This configuration changed the direction of the entire ITV camera, required a relatively large pan head, and also required a large amount of space for work, so it had the disadvantage that it could not be used in a narrow space.

As a means to solve this drawback 1, a reflector is placed in front of the ITV camera, and the surrounding situation reflected in this reflector is
- I can't think of a configuration to take pictures with an ITV camera.

In this configuration, the WR direction is selected by adjusting the sound quality of the reflector, so the disadvantages of rotating the entire camera are eliminated. however,
In this configuration, the vertical direction of the object reflected in the reflector changes depending on the #I angle of the reflector, so 7fL is
The vertical direction of the 1゛yy monitor koji when viewed with a camera changes depending on the height of the reflector. For this reason, there is a drawback that it becomes extremely difficult to understand the entire situation using images.

The present invention is aimed at solving the above-mentioned drawbacks,
The vertical direction of the TV monitor screen and the image displayed on the monitor screen.
I equipped with an optical system that matches the vertical direction of the image
There is a TV camera store provided in ◆.

The present invention will be described below using figures.

To make the vertical direction of the image reflected on the TV monitor 1iI11 surface match the vertical direction of the TV monitor 1III surface, after correcting the vertical object caused by the fist reflected in the reflector and making it appear vertical, ■It is good to take pictures with a TV camera.

Therefore, as shown in Figure 1, one reflection 1#12
Let's take a look at the force in front of the TV camera 1, which changes the dovetail angle to be corrected depending on the straightness of the reflecting mirror 2, as shown in FIG.

First, as shown in Fig. 1, let the normal line of the reflector 2 placed in front of the TV camera l point in the direction of the ITV camera 21, and then move the normal line of the reflector 2 in the direction of the ITV camera 21 at an angle α1 in the horizontal direction. Furthermore, let us consider the case where the angle β straddles the order ff7 in the upper direction. In this case, when the vertical object 4 is reflected on the reflector 2 and viewed from the ITV camera 1 side, the following relational expression exists, assuming that the angle [1γ1 is the angle at which the object 4 appears tilted clockwise from the vertical direction.

tan 11 = tan2βl sia 2α1, and if correction is to be made by some means, the angle α1. The correction angle γ1tIff must be determined based on β1. To materialize this, reflect &
2.#4 The V device becomes complicated, requiring a sensor for detecting the sound and an electronic circuit for calculating the noise.

Therefore, the following method was used to easily perform the correction.

First, the basics! 5! For clarity, consider the case where four objects perpendicular to the reflecting mirror 2 are placed above the reflecting mirror 2 and observed from above, as shown in FIG. In Figure 2, is 3 the modulus of reflector 2?
1M, and the angle itα between its normal 3 and the vertical object 4 is
Set it to 2.

In such a case, the image of the vertical object 4 seen on the reflecting mirror 2 can be seen as a fist formed as follows, according to the law of reflection by the plane mirror 2. In other words, the image of the vertical object 4 is on the @ line that appears when the plane including the vertical object 3, the vertical object 4, and t is viewed from above, and appears in the opposite direction to the direction in which the vertical object 4 exists, the vertical object IIM2. The direction does not depend on the value of the angle α2 between the normal 3 and the vertical object 4.

Here, in order to simplify the process, four vertical objects are placed in contact with the reflecting mirror 2, but in the above case, the vertical objects 4 are not in contact with the reflecting mirror 2, but are separated from each other. It's too late.

In this way, when the vertical object 4 is reflected and the reflection mirror 2 is viewed from above, the direction of the vertical object 4 reflected in the reflection @ 2 is the direction of the reflection mirror 2.
The size K of the pigeonhole is determined by the direction in which it is tilted, but it does not depend on it. This has the advantage that when correcting my nuisance, I can focus on only one parameter and perform the correction, and the means for correction can be greatly simplified.

Therefore, in the present invention, a method of observing reflection-2 (r) from above is adopted, and the structure is configured as follows.

FIG. 3 shows the basic configuration of a surveillance camera according to the present invention. In Figure 3, 1 is an ITV camera, 2 is a rotating mirror whose tilt can be completely changed, and 5 is the light reflected by 2 during rotation.
It is a fixed fixed mirror that reflects the light in the direction of the V camera l, and is placed directly above the rotating mirror 2. 6 is a trapezoidal prism, rotation fR2
#IN of the image of the fC vertical object 4 reflected on the fixed mirror 5 and the fixed mirror 5! It
s It is for correcting. This trapezoidal prism 6 is placed between the fixed mirror 5 and the ITV camera 1. Then, if the image reflected on the fixed mirror 5 is #4'@angle #kr3, the trapezoidal prism 6 is rotated by (γ3)/2 in the opposite direction to its inclination angle, and from the IT ■ camera 1 side. When you look at it, it's like a prism that makes you see the correct order.

In such a MG surveillance camera, it is assumed that the order of the normal line of the rotating mirror 2 when viewed from above is rotated clockwise from the front direction by an angle α3 and is in the opposite direction.

When viewed from above, the rotating mirror 2 reflects this elaborate object 4, and the upper direction of the object is reflected at an angle of (18o1α3).

Furthermore, when this image is reflected on the fixed mirror 5 and observed from the I'l'V camera 1 side, it appears to be tilted from the upper direction to the left by an angle α3.

Accordingly, in the trapezoidal prism 6, the image field of the vertical object 4 reflected on the fixed mirror 5 is rotated to the right by an angle α3, n is corrected, and the image taken by the ITV camera 1 is reflected in the correct direction.

Correction by trapezoidal prism 6 is performed using trapezoidal prism 6.
Camera lit! It is performed by rotating the fist at an angle (α3V) to the right when viewed from l.

As described above, according to the present invention, the correction of image singing only needs to be performed based on the angle α3 in the direction in which the normal line of the rotating mirror 2 is distorted, and the surveillance camera can be greatly simplified.

Hereinafter, the present invention will be explained with reference to all specific embodiments.

FIG. 4 shows the basic configuration of an embodiment of the present invention. In the same area, the source incident on the rotating mirror 47 from the vertical object 4 is rotated -4
It is reflected at 7 and heads toward the fixed mirror 46.

The light is further reflected by the fixed prism 46 and the trapezoidal prism 4
5 and enters the lens 42 of the ITV camera 41.

The rotating mirror 47 is rotated by small motors 48 and 52. The small motor 52 is used to rotate the rotary mirror 47 in the vertical direction, and the small motor 48 is used to rotate it in the horizontal direction.

The support 51 of the rotation 47 is equipped with gears on the outer periphery.
The driving force from the small motor 48 is transmitted by the capacitor aMm 53° 54 and the gear 50. The small motor 48 is also used to rotate the trapezoidal prisms 45. The outer periphery of the support 44 of the trapezoidal prism 45 is provided with gear teeth, and driving torque is transmitted from a small motor 48 by a sheave 49. Here, the number of teeth of the tooth $50 and the gear of the support 51, and the number of teeth of the gear 49 and the support 44 are such that the horizontal rotation angle of the rotary mirror 47 is Arrange them so that they are doubled.

Accordingly, in the surveillance camera of the present invention, since the rotating mirror 47 is horizontally rotated, the inclination of the vertical object 4 transmitted to the ITV camera 41 by the reflection from the rotating mirror 47 and the fixed 946 is rotated. At the same time as the mirror 470 rotates, the trapezoidal prism 45 rotates to correct the rotation.

This surveillance camera rotates @47 by a small motor 52.
The vertical rotation applied to is unrelated to the rotation of the image of the vertical object 4 transmitted to the ITV camera 41! ! # is clear from the previous explanation.

In addition, 43 in FIG. 4 is a case, and 55 and 56 are ball bearings to be assembled into the rotating part.

- According to the present invention, it is possible to easily observe the same music of an ITV camera inserted into a narrow space. Also, with the surveillance camera of the present invention, II! The advantage is that the vertical direction of each picture displayed on the TV monitor screen always matches the vertical direction of the TV monitor screen, making it easy to judge the situation based on the images.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a situation in which the surrounding emit is detected using a single reflecting mirror, Fig. 2 is an explanatory diagram of how a vertical object reflected on a dovetail piece is visible, and Fig. 3 is a surveillance camera according to the present invention. FIG. 4 is a basic configuration diagram of an embodiment of the present invention. 1... ITV camera, 2.47... Reflecting mirror (rotating mirror), 3... Normal line, 4... Object, 5.46... Fixed mirror, 6.45... Trapezoidal prism , 48.52...Small motor, 49°50.51...Gear, 53.54.
...Bevel gear, 55゜56...ball bearing. Agent Patent Attorney Toshiyuki Usuda%+ Figure VJ2121 ¥73 Figure 'VJ4- Figure

Claims (1)

[Claims] 1. Place the leather texture to be changed on a first plane mirror and either directly above or below the first plane mirror, and the light emitted from the first plane in the horizontal direction. a second plane mirror that reflects the light to the first plane mirror; a trapezoidal prism that transmits the light reflected by the second plane mirror; a television camera that receives the light that has passed through the trapezoidal prism; and a surveillance camera that includes a mechanism that fully rotates the trapezoidal prism and the first plane mirror. In , the clockwise rotation angle of the first plane mirror is twice the counterclockwise rotation angle of the queen trapezoidal prism's horizontal axis and needle rotation axis. Surveillance camera as image.