JPS62100606A - Measuring method of degree of parallel of optical axis - Google Patents

Abstract

PURPOSE:To enable the convenient measurement and adjustment of the degree of parallel of an optical axis by a method wherein two measuring points, a sighting eyeglass and a sighting plate displaying the relative positional relationship of the optical axis of a monitoring TV camera disposed in parallel to the eyeglass are provided in the direction of the optical axis of the sighting eyeglass. CONSTITUTION:A sighting plate 4 is set at a point P1 vertically to optical axes 11 and 12 and separately at a distance (a), and a position indicating point 11 on the sighting plate 4 is caught and sighted by a sighting eyeglass 1. When the indicating point 11 is thereby sighted 1, the optical axis 12 of a TV camera 2 disposed in parallel to the eyeglass catches exactly the center of a position indicating point 12' on condition that the degree of parallel is maintained exactly. Then, setting is modified so that the indicating point 12' is superposed on the center Q of an image plane as shown in an A-arrowed view of an mirror TV 3. Next, the sighting plate 4 being transferred to a measuring point P2 reached by shifting the distance by (a) further, the same measure is taken as in the case of the measuring point P1, and it is checked whether the indicating point 12' is projected in superposition on the center of the image plane or not. The indicating point 12' is in accord naturally with the center Q of the image plane if the degrees of parallel of the eyeglass 1 and the optical axis 12 of the camera 2 are maintained exactly, and when it is not in accord, the relative setting positions of the eyeglass 1 and the monitor 2 are modified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring optical axis parallelism, and in particular, the present invention relates to a method for measuring optical axis parallelism, and in particular, a method comprising sight glasses and a television camera arranged so that the optical axis is parallel to the sight glasses; The present invention relates to a method for determining optical axis parallelism a+++ for measuring the parallelism of optical axes necessary to maintain evaluation accuracy when evaluating aiming ill + practice of a moving target using images from a television camera.

[Conventional technology]

Aiming at a moving target such as a variety of vehicles moving on the ground with sighting glasses, emitting a laser beam to the moving target and capturing the reflected light to home a missile, or for other purposes. It may be necessary to aim accurately. In such cases, accurately aiming at a moving target is never easy;
In many cases, it is operated with considerable training. For example, when trying to aim at a moving target using sight glasses with a magnification several times higher than that determined in consideration of securing the necessary field of view, the distance may be at most 1 to 2 + 11, but in case of a reporting situation, it may be several millimeters.
It is necessary to continue to capture objects with a spread of less than radians, and in order to perform stable aiming and tracking, tracking +
11th practice is necessary no matter what.

By the way, such tracking! The means for evaluating the 11th training has basically been established, and its contents are roughly as follows.

In other words, if a TV camera is positioned so that the optical axis of the sighting glasses is parallel to the line of sight, and a moving target is captured by the sighting glasses, the magnification is adjusted so that the optical axis is parallel to this and to improve measurement accuracy. The image of a moving target captured by a television camera that is several times larger than the conventional one is normally adjusted in advance so that it is displayed approximately in the center of the display screen. In this case, it is clear that as long as the television camera holds the aiming glasses and its optical axis parallel, and as long as the aiming is accurate, the image of the moving target by the television camera will always be held at the same point. . On the other hand, if you are blind, even if you correctly capture and track a moving target with sighting glasses, if the optical axis is not parallel, the projection point of the image will be distorted depending on the degree of deviation, and in extreme cases, the point of projection will be distorted from the image plane. It deviates and becomes unmeasurable. In reality, the training is evaluated based on whether or not this projection point is within a preset tolerance circle, and the prerequisite for this is to check the parallelism of the optical axis and improve the machining accuracy to obtain the specified accuracy. Either the TV camera is manufactured as a sturdy structure, or the TV camera is installed in the field and adjusted at the operating distance so that the image captured by the TV camera falls within a predetermined tolerance during actual operation. .

[Problem that the invention seeks to solve]

However, the conventional optical axis parallelism measuring method described above has the following drawbacks.

In other words, manufacturing a robust structure with improved machining accuracy results in a significant increase in overlap and shape, and there is also the disadvantage that field adjustment prior to actual operation requires a large amount of man-hours and time.

Another object of the present invention is to provide a method for measuring optical axis parallelism that eliminates the above-mentioned drawbacks.

[Means for solving problems]

The method of the present invention provides a method for carrying out tracking training while aiming at a moving object through aiming glasses, and evaluating the tracking training using a television camera that operates while holding the optical axis parallel to the aiming glasses. In the optical axis parallelism measuring method for measuring the parallelism of the optical axes of a television camera, at least two aiming plates are set in advance perpendicular to the optical axis and displaying the relative positional relationship between the optical axes of the standard glasses and the television camera. The position indication of the optical axis of the sighting glasses on the sighting plate at each d (11 fixed points) is obtained by the TV camera while aiming the position of the optical axis of the sighting glasses on the sighting plate. The present invention includes an optical axis parallelism measuring means for determining the parallelism of the optical axes through the degree of coincidence of at least two images regarding the position display of the optical axis of the television camera.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the present invention.

The embodiment shown in FIG. 1 includes sight glasses 1, a television camera 2.
It is configured with a monitor television 3 and a sight plate 4, and the sight glasses 1 and the television camera 2 are attached to the body of the optical application device 20 with their optical axes parallel to each other, and the monitor television 3 is connected to the body of the optical application device 20 via a cable 301. and is connected to the television camera 2.

The center position on the screen of monitor TV 3 is set to EI in advance.
It is clearly determined by viewing AJ (Japan Electronics Industry Association Standards) test charts and the like.

2 is a front view of the aiming plate in the embodiment of FIG. 1, and FIG. 3 is a front view of the optical application device in the embodiment of FIG. 1.

In Fig. 2, 11 and 12 are the position display points of the optical axes of the sighting glasses 1 and the television camera 2, respectively, which are arranged in the optical application device 20, and %b and c are the distances indicating the relative positional relationship of these position display points. be.

In addition, the tolerance range 121 shown in the enlarged view of the position/minus degree display point 12 shown in FIG. If d, then the parallelism of the optical axes of the sighting glasses 1 and the monitor television 2 is maximum d/a as long as the center of the screen of the monitor television 3 is included in this allowable entertainment difference circle.
It can be said that it is within (radians). Here, a is the distance between the measurement point P1 and the sighting glasses 1 as shown in FIG.

FIG. 3 is a front view of the optical application device in the embodiment shown in FIG. 1, and shows the sighting glasses 1 and the television camera 2 placed at relative positions indicated by distances c, viewed from the front direction. αυ and α2 each indicate the optical axis, and the two position display points 11 and 12 shown in FIG. 2 are maps of the relative positional relationship of these optical axes. Below, the second and third
The embodiment shown in FIG. 1 will be described with reference to the drawings.

In FIG. 1, the aiming plate 4 is installed perpendicular to the optical axes αυ and α2 at a distance a, and the position display point 11 of the aiming plate 4 is captured and aimed with the sighting glasses 1 through the eyepiece E. In this case, the center of the reticle of the sighting glasses 1 is usually aligned with the position display point 11. The distance a may be a distance sufficient to measure the parallelism of the optical axis, and may be a short distance of about 1/10 to several tenths of the actual operational distance.

In this way, when aiming at the position display point 11 with the sighting glasses 1,
The optical axis of the television camera 2 arranged parallel to this should accurately capture the center of the position display point 12 as long as the parallelism is maintained accurately. As shown in the A arrow view of the monitor television 3, the installation is corrected so that the position display point 12 is aligned with the center Q of the image plane.

Next, the measurement point P where the aiming plate 4 is further shifted by distance a
2, and check whether the position display point 12 is displayed superimposed on the center Q of the image plane in exactly the same manner as the measurement point P1. As long as the parallelism of the light KIII of the sighting glasses 1 and the TV camera 2 is maintained accurately, the position display point 12 should coincide with the center Q of the image plane. Correct the negative relative mounting position.

In this case, it is common that a certain range of error is allowed due to operational considerations, so a tolerance circle 121 as shown in FIG. 2 is given to the position display point 12 of the sight plate 4, If you confirm that the center Q of the image plane of the monitor TV 3 is within this imaged tolerance circle, then d/
The parallelism of the optical axis is confirmed by an error of a (radian).

In this way, the parallelism of the optical axis can be checked and corrected very easily.

Note that in the embodiment shown in FIG. 1 described above, measurements are performed at two measurement points P1 and P2 separated by a distance a, but the parallelism of the optical axes of the sighting glasses 1 and the television camera 2 is maintained. As long as the center of the image plane Q and the light 4 (board position 1 is the display point 1
2 is the same at any distance, which is a basic feature of the present invention.Therefore, the number of measurements may be two or more, but in this embodiment, the minimum number of measurements is two.

Furthermore, it is clear that the installation distance of the aiming plate 4 does not necessarily need to be set for each a as long as the measurement accuracy can be guaranteed, and that it can be set to any arbitrary distance in almost the same way.

〔Effect of the invention〕

As explained above, according to the present invention, the relative positional relationship between at least two measurement points accurately measured in the direction of the optical axis of the sighting glasses and the optical axis of the sighting glasses and the monitor television camera arranged parallel thereto can be determined. By being equipped with a means to measure the parallelism of the optical axes using a display sight plate, it is possible to measure and adjust the parallelism of the optical axes extremely easily, and it is also possible to easily obtain a certain distance even within the target area. The present invention has the advantage that it is possible to realize an optical axis parallelism measurement method that can be implemented and, therefore, can significantly uniformize the performance of optical application devices.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
FIG. 3 is a front view of the aiming plate in the embodiment shown in the figure, and FIG. 3 is a front view of the optical application device in the embodiment shown in FIG. 1... Sighting glasses, 2... TV camera, 3... Monitor TV, 4... Sighting plate, 11... Sighting glasses light Axis position display point, 12
・・・・・・Position display point of optical axis of TV camera, aυ, (
lZ-... Optical axis, 20... Optical application device. Agent Patent Attorney Shinichi Uchihara θ 1-1---a- 1st cause

Claims (1)

[Claims] When conducting tracking training while aiming at a moving target through sighting glasses and evaluating the tracking training with a television camera that operates while holding the optical axis parallel to the sighting glasses, it is necessary to In the optical axis parallelism measurement method for measuring parallelism, a sighting board indicating the relative positional relationship between the optical axes of the standard glasses and the television camera is placed at measurement points perpendicular to the optical axis and at least two preset distances. While sequentially installing the camera at each measuring point, aiming the position display of the optical axis of the sight glasses on the sight plate with the sight glasses, the optical axis is measured based on the degree of coincidence of at least two images regarding the position display of the optical axis of the television camera. A method for measuring optical axis parallelism, comprising: an optical axis parallelism measuring means for determining the parallelism of the axes.