JP2024058884A - Camera orientation jig - Google Patents

Abstract

[Problem] To provide a camera facing jig that is simple in structure, easy to work with, and unlikely to damage a display surface. [Solution] The camera facing jig 1 is placed on a display surface 11 to face a display 10 and a camera 20, and is equipped with a half mirror plate 2 that is placed so that a first surface 2a faces the display surface 11, and a support mechanism 5 that is installed on a second surface 2b, which is the opposite surface to the first surface 2a of the half mirror plate 2, and supports the first surface 2a so that it faces and abuts against the display surface 11, and the peripheral edge 2c of the first surface 2a of the half mirror plate 2 that abuts against the display surface 11 is chamfered. [Selected Figure] Figure 1

Description

The present invention relates to a camera orientation tool that orients a camera to be used for measurement with a display before measuring display characteristics such as MTF (Modulation Transfer Function).

In general, when measuring display characteristics such as MTF, the optical axis of the camera is adjusted so that it is perpendicular to the display surface before measurement. For example, it is known that a laser oscillator is used to align the optical axis of the camera. Also, when the optical axis of the camera is to be directly facing the display surface, for example, a measuring device with a built-in small camera (see non-patent document 1) is used.

Japanese Patent Application Laid-Open No. 3-130639

https://www.xrite.com/en-us/blog/how-to-calibrate-your-monitor

However, conventional methods for aligning optical axes require the use of laser oscillators and the like, resulting in large-scale equipment. In addition, when using a measuring device with a built-in small camera, alignment is performed on the display surface, so the worker must manually move the device directly to the appropriate position on the display screen, which can easily damage the display surface. Furthermore, there is a demand for a measuring device that is equipped with a mechanical component such as a camera in the part that contacts the display surface, and that has a simple configuration and is easy to use.

The present invention was devised in consideration of the above-mentioned problems, and aims to provide a camera facing tool that is simple in structure, easy to use, and unlikely to damage the display surface.

As one aspect of an embodiment of the present invention, a camera facing jig is arranged on a display surface to face a camera to the display, and includes a half-mirror plate arranged with a first surface facing the display surface, and a support mechanism installed on a second surface opposite the first surface of the half-mirror plate and supporting the first surface so as to abut against the display surface, and the edge of the first surface of the half-mirror plate that abuts against the display surface is chamfered.

According to one aspect of the present invention, the camera facing jig has a simple structure, is easy to use, and is unlikely to damage the display surface.

FIG. 1 is a perspective view showing an overall configuration in which a camera facing jig according to an embodiment is used. FIG. 2 is a side view showing an overall configuration in which the camera facing jig of FIG. 1 is used. 1 is a perspective view showing a state in which a camera facing jig according to an embodiment is placed on a display surface. 1 is a perspective view showing a support mechanism of a camera facing jig according to an embodiment, seen from the rear side of a display. FIG. 1A to 1E show the state in which the string-shaped member of the camera facing jig of the embodiment has been removed, where (a) is a front view of the camera facing jig, (b) is a rear view of the camera facing jig, (c) is a side view of the camera facing jig, (d) is a plan view of the camera facing jig, and (e) is a perspective view of the camera facing jig. 1A is a front view showing a state in which a positioning mark is displayed on a display in the embodiment, and FIG. 1B is a front view showing a state in which a reference mark is displayed on a PC in the embodiment. FIG. 1A is a front view showing the state in which the display positioning mark and the reference mark are superimposed and displayed on the monitor screen of a PC in an embodiment, and FIG. 1B is a front view showing the state after the camera lens has been moved from the state shown in FIG. FIG. 1A is a front view showing an embodiment in which the image of the lens reflected in the half mirror is superimposed on the reference mark and displayed on a PC monitor screen; FIG. 1B is a front view showing the state in which the camera lens has been moved and aligned from the state shown in FIG. 1A; and FIG. 1C is a plan front view showing the state in which the reference circle of the reference mark has been aligned with the diameter of the camera lens. 13A and 13B are a side view and a perspective view showing a modified example of the rod of the camera facing jig according to the embodiment. 1A and 1B are a side view and a perspective view showing a first application example of a camera facing jig according to an embodiment. 13A and 13B are a side view and a perspective view showing a second application example of the camera facing jig according to the embodiment.

Hereinafter, an embodiment of the present invention will be described by taking as an example a case where it is applied to a camera facing jig 1.
1, 2, and 5(a) to (e), the camera facing jig 1 is disposed on a display surface 11 to face the display 10 and the camera 20. As an example, the camera facing jig 1 includes a half mirror plate 2 disposed with a first surface 2a facing the display surface 11, and a support mechanism 5 installed on a second surface 2b, which is the opposite surface to the first surface 2a of the half mirror plate 2, and supporting the first surface 2a so as to abut against the display surface 11. The peripheral edge 2c of the first surface 2a of the half mirror plate 2 that abuts against the display surface 11 is chamfered.

The display 10 on which the camera facing jig 1 is used is, for example, the subject of MTF measurement. The display 10 has a display surface 11 arranged within a frame 12 supported by legs 13, and a housing 14 for projecting an image onto the display surface 11 is integrally formed on the rear side of the display surface 11. It is also preferable that the display 10 is fixed by a fixing device 15 so that it is not affected by vibrations when placed on a workbench T via the legs 13. The display 10 is designed so that a positioning mark P1, which serves as a reference for moving the position of the lens 21 of the camera 20 to the appropriate position, can be displayed on the display surface 11 by operating the PC 30.

As an example, the fixing device 15 includes an assembly block 16 having a through hole, a vertical support rod 17 inserted into the through hole of the assembly block 16, a horizontal support rod 18 inserted into the through hole of the assembly block 16 so as to be perpendicular to the vertical support rod 17, and an abutment portion 19 that abuts against the display 10. The abutment portion 19 includes a first abutment portion 19a that is installed on one end of the horizontal support rod 18 and abuts against the back side of the display 10, and a second abutment portion 19b that abuts to fix the leg 13 of the display 10. The workbench T has a plurality of recesses (not shown) formed at regular intervals on its mounting surface, so that the engaging protrusions 17a arranged at one end of the vertical support rod 17 of the fixing device 15 can engage with the recesses of the workbench T. The engaging pin 19b1 of the second abutment portion 19b of the abutment portion 19 can engage with the recesses of the workbench T.

The first contact portion 19a is formed of an elastic material such as rubber and is installed on one end side of the horizontal support rod 18. As an example, the first contact portion 19a is formed in a disk shape with a predetermined thickness. As an example, the second contact portion 19b has a first portion that contacts the upper surface of the leg 13, a second portion that contacts the upper surface of the work table T, and a portion that connects the first portion and the second portion, and the leg 13 side is fixed by inserting the engagement pin 19b1 into the recess of the work table T through a through hole formed in the second portion. In this way, the contact portion 19 fixes the display 10 so that it does not vibrate by the first contact portion 19a abutting the back side of the display 10 at multiple points and the second contact portion 19b abutting the front side of the display at multiple points on the leg 13 side. Note that the number of first contact portions 19a and second contact portions 19b to be installed is arbitrary, and the number of installations is not limited as long as the display 10 can be fixed so as not to vibrate.

The assembly block 16 is a block that has through holes for inserting at least two of the vertical support rods 17 and the horizontal support rods 18. This assembly block 16 is designed to be able to receive a first through hole for inserting the vertical support rod 17, a vertical positioning screw 16a for abutting against the vertical support rod 17 inserted into the first through hole to position the vertical support rod 17 at that position, and a second through hole for inserting the horizontal support rod 18, and a horizontal positioning screw 16b for abutting against the horizontal support rod 18 inserted into the second through hole to position the horizontal support rod 18 at that position.
The fixing device 15 is not limited to a specific one as long as it is a general one that can fix the display 10 to the workbench T. As will be described later, one of the assembly blocks 16 supports the rotation shaft rod 8 of the support mechanism 5 by the assembly block 16, for example, in a state in which the orientation of the assembly block 16 is changed by 90 degrees from that of the other assembly blocks 16. When the horizontal positioning screw 16b is tightened, the rotation shaft rod 8 is allowed to rotate freely or is held in place.

The support mechanism 5 supports the half mirror plate 2 in a position directly opposite the display surface 11 and the camera 20 , and also brings the half mirror plate 2 into contact with the display surface 11 .
As an example, the support mechanism 5 includes a bar-shaped rod 3 arranged on the second surface 2b of the half mirror plate 2, a weight 4 arranged on the tip side of the rod 3 and having a diameter larger than that of the rod 3, and a string-like member 6 engaged with the rod 3 and supported on the housing side of the display 10. Note that in this embodiment, the support mechanism 5 rotatably supports a rotating shaft rod 8, which supports the string-like member 6 so as to be freely wound up and unwound, on an assembly block 16. The support mechanism 5 also attaches the string-like member 6 to the rod 3 via an attachment ring 7.

The rod 3 is installed on the second surface 2b of the half mirror plate 2. The rod 3 may be made of a different material from the half mirror plate 2 or the same resin material. For example, if the half mirror plate 2 is made of acrylic resin, it is preferable that the rod 3 is also made of acrylic resin from the viewpoint of adhesive strength. As an example, the rod 3 is formed in a cylindrical shape. And, when the half mirror plate 2 is placed on the display surface 11, the rod 3 is placed so that it is located above the center of the half mirror plate 2. The length of the rod 3 is set within a range in which the first surface 2a of the half mirror plate 2 suspended by the string-like member 6 can abut against the display surface 11 when the weight 4 is placed on one end side of the rod 3.

The weight 4 makes it easier for the half mirror plate 2 to abut against the display surface 11. The weight 4 is installed on one end side of the rod 3. As an example, the weight 4 is a cylindrical member, and is preferably made of a material having a larger specific gravity than the material of the rod 3. Here, the weight 4 is made of rubber, synthetic rubber, silicone rubber, or the like. The weight 4 may be fixed to the rod 3 with an adhesive or the like, or may be connected to the rod 3 so as to be freely inserted and removed. The weight 4 ensures that a force is always applied in the direction in which the half mirror plate 2 suspended by the string-like member 6 abuts against the display surface 11. Since there are various configurations of the display 10 directly facing the camera 20, if the weight 4 is connected to the rod 3 so as to be freely inserted and removed, it is possible to adjust the half mirror plate 2 to abut appropriately against the display surface 11 by changing the position of the weight 4 on the rod 3 in accordance with the configuration of the display 10. In order to be able to adjust the position of the weight 4 in the longitudinal direction of the rod 3, the weight 4 can be attached to the rod 3 without using an adhesive or the like, by inserting the rod 3 into the through hole of the weight 4 in a removable manner.

One end of the string-like member 6 is attached to the rod 3 via an attachment ring 7, and the other end is wound around a rotating shaft rod 8 that can be freely wound and fed. The string-like member 6 may be made of a common material, such as cotton or a resin such as nylon. The cross-sectional shape of the string-like member 6 is not particularly limited, and it may be circular or flat. Furthermore, the thickness of the string-like member 6 is not limited as long as it has the strength to hold the half mirror plate 2, the rod 3, and the weight 4.

The attachment ring 7 is for attaching the string-like member 6 to the rod 3. The attachment ring 7 is formed in a C-shaped ring of resin or metal with a portion of the ring not being continuous. The attachment ring 7 can be made larger than the diameter of the rod 3 by forcibly widening the opening of the C-shape, allowing it to be attached to the rod 3 in a detachable manner. The attachment ring 7 may be installed in a ring-shaped state attached to the rod 3 in advance, and then the weight 4 may be attached to the rod 3.

The rotating shaft rod 8 is supported by the assembly block 16 so as to be freely rotatable, and winds and unwinds the string-like member 6. The rotating shaft rod 8 is inserted into the second through-hole of the assembly block 16, which is used to insert the horizontal support rod 18, in a state in which it is turned 90 degrees from the other assembly blocks 16, and is supported by the horizontal positioning screw 16b. Therefore, the rotating shaft rod 8 unwinds and winds the string-like member 6 by releasing the tightening state of the horizontal positioning screw 16b and rotating the rotating shaft rod 8 with the worker's fingers. Although the rotating shaft rod 8 has been described as being rotatably supported via the assembly block 16 of the fixing device 15, it may be supported and used by a device that can perform winding and unwinding independently of the fixing device 15. Although the rotating shaft rod 8 has been described as being rotated by the operator's fingers, it may be configured to be rotated electrically via a drive motor.

As shown in FIG. 1, FIG. 5(a)-(e) and FIG. 6, the half mirror plate 2 faces the center of the camera 20 directly against the center of the half mirror plate 2 that abuts against the display surface 11. As an example, the half mirror plate 2 is formed by forming a transparent acrylic resin into a circle. This half mirror plate 2 can be formed by providing or attaching a metal thin film or a dielectric multilayer film to one or both of the first surface 2a and the second surface 2b. The edge of the periphery 2c of the first surface 2a of the half mirror plate 2 is chamfered. Note that, although the edge of the periphery 2c of the first surface 2a of the half mirror plate 2 is shown as being chamfered, the edge of the periphery of the second surface 2b may be further chamfered.

Because the peripheral edge 2c of the first surface 2a of the half mirror plate 2 is chamfered, when the half mirror plate 2 is operated and placed in a predetermined position on the display surface 11, even if the peripheral edge 2c of the half mirror plate 2 comes into contact with the display surface 11, the display surface 11 will not be scratched. The size of the half mirror plate 2 is preferably large enough to reflect the entire lens of the camera 20 and capture it as an image. In addition, although the shape of the half mirror plate 2 is shown as a circle, it is not limited in size and may be a rectangle, regular polygon, or any other shape that can capture an image of the lens from the front of the camera 20. The half mirror plate 2 is placed via the support mechanism 5 at a position that is approximately centered on the positioning mark P1 displayed on the display surface 11.

As shown in Figs. 1 and 2, the camera 20 comprises a lens 21, a camera body 22, and an attitude control mechanism 23. It is preferable that the camera 20 has the accuracy to determine the characteristics of the display 10. The camera 20 is capable of measuring, for example, the MTF. The attitude of the camera 20 is controlled so that a positioning mark P1 displayed on the display is aligned with the center of the lens 21. The image captured by the camera 20 is set to be displayed on a monitor screen 31 of a personal computer (hereinafter referred to as PC) 30 prepared on the workbench T.

The attitude control mechanism 23 of the camera 20 adjusts the position of the camera 20 mounted on the table. When the work surface of the work table T is the XY plane, the attitude control mechanism 23 controls the attitude of the camera 20 by moving the table surface by rotating the knob in the X direction, the Y direction perpendicular to the X direction, the Z direction perpendicular to the XY plane, and the θ direction around the Z direction. The attitude control mechanism 23 can use a tilt rotation stage, an X/Y/Z stage, or other common configuration used in this type of camera. The camera 20 used here is configured to display the captured image on the monitor screen 31 of the PC 30 by wireless such as Bluetooth (registered trademark) or by wire. The PC 30 is configured, as an example, to be able to capture images with the camera 20 and operate the display 10.

Next, a method of using the camera facing jig 1 will be described.
First, the display 10 is fixed to the workbench T by the fixing fixture 15. Here, the legs 13 of the display 10 are fixed by the second abutment portion 19b of the abutment portion 19, and the first abutment portion 19a of the abutment portion 19 is abutted against the housing portion 14 side, which is the back surface of the display 10, by the vertical support rod 17 inserted into the assembly block 16 and the horizontal support rod 18, thereby fixing the display 10 on the workbench T. Note that, since the workbench T has a large number of recesses formed in advance at predetermined intervals in the row and column direction, the display 10 is fixed to the workbench T by the fixing fixture 15 by engaging the engaging pins 19b1 of the fixing fixture 15 and the engaging protrusions 17a of the vertical support rod 17 with the recesses.

When the display 10 is fixed on the workbench T by the fixing device 15, the rotating shaft rod 8 of the camera facing jig 1 is installed on one of the assembly blocks 16. Then, the camera facing jig 1 is arranged so that the first surface 2a of the half mirror plate 2 faces the display surface 11 of the display 10, with one end of the string-like member 6 wrapped around the rotating shaft rod 8 and the other end of the string-like member 6 attached to the rod 3 via the mounting ring 7. Furthermore, the rotating shaft rod 8 is rotated to adjust the length of the string-like member 6 so that the positioning mark P1 is located approximately in the center of the half mirror plate 2. Since the half mirror plate 2 has the weight 4 via the rod 3, it is always biased toward the display surface 11 by the weight 4, and the first surface 2a is in contact with the display surface 11. In addition, due to the weight 4, the half mirror plate 2 is always in contact with the display surface 11, and when the half mirror plate 2 is moved and adjusted to an appropriate position, the peripheral edge 2c of the first surface 2a of the half mirror plate 2 is chamfered and has no edges, so the display surface 11 is not damaged by the half mirror plate 2. After the camera facing jig 1 is set, the attitude of the camera 20 is adjusted. As shown in FIG. 6(a), the display 10 is set to a state where a positioning mark P1 for facing is displayed by operating the PC 30.

The camera 20 is disposed at a certain distance in front of the display 10. The camera 20 is often placed on a rail that can move toward the display 10, and it is convenient if the rough positional relationship between the camera 20 and the display 10 can be adjusted by moving the camera 20 via the rail (not shown).
The adjustment of the distance between the camera 20 and the display 10 is performed after the half mirror plate 2 is placed on the display surface 11 via the support mechanism 5. The adjustment of the distance between the camera 20 and the display 10 is performed while displaying the image captured by the camera 20 on the monitor screen 31 of the PC 30, and by moving the camera 20 to a position where the entire captured half mirror plate 2 is displayed on the monitor screen 31.

Incidentally, as shown in Fig. 6(a), a positioning mark P1 which is a mark indicating a reference position is displayed on the display 10. Also, as shown in Fig. 6(b), a reference mark S for aligning the lens 21 of the photographing camera 20 by the MTF measurement software for performing measurements in advance is displayed on the monitor screen 31 of the PC 30.
As shown in Fig. 7(a), the camera 20 is focused on the positioning mark P1 on the display surface 11, and an image P1g of the positioning mark P1 is displayed on the monitor screen 31 of the PC 30, overlapping with the reference mark S. Then, the attitude control mechanism 23 of the camera 20 is operated to match the image P1g of the positioning mark P1 being photographed with the central intersection of the reference mark S, as shown in Fig. 7(b). The attitude control mechanism 23 can adjust the position, inclination, and rotation of the lens 21 of the camera 20, so that the position of the lens 21 on the image is adjusted by the operator adjusting the position of the camera 20. Note that in the drawing, the position of the lens 21 is adjusted by operating each knob of the attitude control mechanism 23 that moves it in each direction.

Next, as shown in FIG. 8(a), the focus of the camera is switched to the image 21g of the lens 21 of the camera 20 reflected in the half mirror 2. Then, the image 21g of the lens 21 is displayed on the monitor screen 31 of the PC 30, overlapping with the reference mark S. Then, as shown in FIG. 8(b), the attitude control mechanism 23 of the camera 20 is operated to adjust the position of the lens 21 so that the image 21 of the lens 21 is located at the center of the reference mark S. Note that, as shown in FIG. 8(c), the image 21g of the lens 21 can be aligned with the reference mark S by adjusting the diameter of the reference circle S2 of the reference mark S so that it matches the diameter of the image 21g of the lens 21. In other words, by matching the diameter of the reference circle S2 with the diameter of the image 21g of the lens 21, it becomes easier to determine the positional deviation, and it becomes possible to perform alignment with high accuracy.

Then, the operations shown in Figs. 7(a) and 7(b) are performed again, and then the operations shown in Figs. 8(a) and 8(b) are performed, and the attitude control mechanism 23 is repeatedly operated until the intersection of the image P1g of the positioning mark P1 and the reference line S1 of the reference mark S coincides on the monitor screen 31 of the PC 30 displayed in Fig. 7(a), and the image 21g of the lens 21 and the reference circle S2 of the reference mark S overlap and coincide in the center on the monitor screen 31 of the PC 30 shown in Fig. 8(a). By performing such alignment operations, the optical axis of the lens 21 of the camera 20 is aligned with the positioning mark P1 of the display 10, and the lens 21 of the camera 20 and the display 10 are directly opposed to each other.

Here, it has been described that the display 10 and the camera 20 are faced to each other by first aligning the image P1g of the positioning mark P1 on the display 10 with the reference mark S, then aligning the image 21g of the lens 21 of the camera 20 with the reference mark S, and repeating these steps. This facing step may also be performed by first aligning the image 21g of the lens 21 of the camera 20 with the reference mark S, then aligning the positioning mark P1 on the display 10 with the reference mark S, and repeating these steps alternately.

Although the operation of the attitude control mechanism 23 of the camera 20 has been described as being performed manually by an operator, it is also possible to use an attitude control mechanism that can be controlled in conjunction with the PC 30, and that is configured so that the attitude control mechanism 23 of the camera 20 is operated by pressing an arrow button on the PC 30. Also, the PC 30 may be set in advance so that the attitude control mechanism 23 of the camera 20 moves the lens 21, and the PC can emit a sound or display when the center of the camera image 21g and the image P1g of the positioning mark P1 are aligned, so that it is clear that they are aligned.

When the alignment between the positioning mark P1 on the display surface 11 and the center of the lens 21 of the camera 20 is completed, the camera facing jig 1 is removed from the display 10, and the camera 20 facing the display 10 can be used to accurately perform tasks such as measuring the MTF of the display 10. Note that when measuring the MTF of the display 10, for example, a reference plate 40 (see FIGS. 1 and 2) prepared in advance on the workbench T can be used.
In this manner, the camera facing jig 1 has a simple structure and is easy to operate, and also makes it easy to face the display 10 and the camera 20 directly.

The camera facing jig 1 may have a configuration as shown in Fig. 9 to Fig. 11. In the following description, the configuration of the camera facing jig that has already been described may be omitted from the illustration, or may be given the same reference numerals and description thereof may be omitted.
As shown in FIG. 9, the camera facing jig 1A has a rod 3A with grooves or recesses in a direction perpendicular to the longitudinal direction. As an example, the camera facing jig 1A may have a configuration in which the rod 3A has a plurality of convex portions 3A1 and concave portions 3A2 continuously arranged in the longitudinal direction. By providing the rod 3A with the convex portions 3A1 and concave portions 3A2, the position of the mounting ring 7 of the string-shaped member 6 is fixed and can be prevented from shifting during work. In addition, by changing the position of the mounting ring 7 on the rod 3A, the state in which the load of the weight 4 is applied can be changed, and the half mirror plate 2 can be accurately abutted against the display surface 11. Note that the shapes of the convex portions 3A1 and concave portions 3A2 are shown as acute-angled concave and convex shapes, but they may also be corrugated concave and convex shapes, and the shape of the concave and convex shapes is not limited.

10, the camera facing jig 1B includes a support mechanism 5B on the second surface 2b of the half mirror plate 2. The support mechanism 5B includes a support leg 6B that connects one end to the lower side of the center of the second surface 2b of the half mirror plate 2, and a fixing part 8B that supports the other end of the support leg 6B and is disposed on the installation surface. The support leg 6B is a bendable metal wire, and is configured to support the half mirror plate 2 by maintaining the bent state of the metal wire.
One end 7B2 of the support leg 6B is rotatably connected to a receiving portion 7B1 which is formed in a spherical shape and is provided on the second surface 2b.

In other words, it is preferable that the support leg 6B is configured so that the connection part 7B is a universal joint. The other end of the support leg 6B is connected to the fixed part 8B that serves as a base. As an example, the support leg 6B has a configuration in which a metal wire is inside and the outside of the metal wire is covered with a covering material such as resin, rubber, or silicone rubber. In addition, the first and second support legs of the support leg 6B are connected to a position below the center of the second surface 2b of the half mirror plate 2, and the first surface 2a of the half mirror plate 2 is abutted against the display surface 11 by freely bending the two support legs 6B with the operator's fingers. As an example, the fixed part 8B is formed in a disk shape and is preferably made of metal. In addition, by having one end of the support leg 6B below the center of the second surface 2b of the half mirror plate 2, the support leg is prevented from being reflected in the image and does not interfere with the adjustment of the lens position.

When the camera facing jig 1B is placed on the workbench T with the first surface 2a of the half mirror plate 2 in contact with the display surface 11, the connection portion 7B operates so that the first surface 2a of the half mirror plate 2 is always in contact with the display surface 11. In other words, because the connection with the support leg 6B at the connection portion 7B is loose, the half mirror plate 2 connected at the connection portion 7B can follow the position of the side it is in contact with. In addition, because the support legs 6B, which are the first and second support legs, can be curved freely, it is possible to freely adjust the height position of the half mirror plate 2 from the workbench T.

As shown in FIG. 11, the camera facing jig 1C has a support mechanism 5C on the second surface 2b of the half mirror plate 2. The support mechanism 5C has a support leg 6C arranged below the center of the half mirror plate 2 via a connection part 7C. The connection part 7C is a universal joint that rotatably supports one end 7C2 of the support leg 6C. The connection part 7C rotatably supports the spherical one end 7C2 on the receiving part 7C1. A fixing part 8C for supporting the support leg 6C on the work table T is attached to the other end of the support leg 6C. The fixing part 8C is formed of an elastic material such as rubber, synthetic rubber, silicone rubber, synthetic silicone rubber, etc., and the side placed on the work table T is formed in a hemispherical shape. As an example, the support leg 6C has two support legs, a first support leg and a second support leg, and is formed in a rod shape made of resin, metal, wood, etc. The connection part 7C is preferably arranged at the left and right ends at the center of the height direction of the half mirror plate 2.

When the camera facing jig 1C is placed on the workbench T with the first surface 2a of the half mirror plate 2 in contact with the display surface 11, the connection portion 7C operates so that the first surface 2a of the half mirror plate 2 is always in contact with the display surface 11. In other words, since the connection state with the support leg 6C at the connection portion 7C is gentle, the abutment state is maintained by its own weight, and the half mirror plate 2 connected at the connection portion 7C can follow the position of the abutting side. In addition, by increasing the inclination angle of the support leg 6C with the workbench T, it is possible to freely adjust the height position of the half mirror plate 2 from the workbench T. Even if the inclination angle of the support leg 6C with the workbench T is increased, the half mirror plate 2 can be appropriately supported on the workbench T because one end side of the fixing portion 8C is hemispherical.

At the center of the half mirror plate 2, a center mark indicating the center point may be provided in a shape different from the positioning mark displayed on the display surface 11. This center mark may be, for example, drawn directly on the surface of the half mirror plate 2, attached with a sticker, or formed by scraping the surface with a laser or mechanically, or by drilling a hole. The center mark may be, for example, a cross, and is aligned before aligning the center of the lens of the camera 20 with the positioning mark P1 on the display surface 11. In other words, by moving the half mirror plate 2 so that the positioning mark P1 on the display surface 11 coincides with the center mark of the half mirror plate 2, the half mirror plate 2 can be positioned in a more appropriate position.

As described above, the embodiment and modified examples of the present invention have been described. The present invention is not limited to the above-described embodiment and modified examples. Appropriate modifications are possible within the scope of the technical concept of the invention. Furthermore, the aspects of the embodiment and the modified examples do not necessarily have to be used independently. The aspects of the embodiment and the modified examples may be combined.

1, 1A, 1B, 1C Camera facing jig 2 Half mirror plate 2a First surface 2b Second surface 2c Periphery 3, 3A Rod 3A1 Convex portion 3A2 Concave portion 4 Weight 5, 5B Support mechanism 6 String-like member 6B, 6C Support leg 7 Mounting ring 7B2, 7C2 One end portion 7B1, 7C1 Receiving portion 7B, 7C Connection portion 8 Rotation shaft rod 8B, 8C Fixing portion 10 Display 11 Display surface 12 Frame 13 Leg portion 14 Housing portion 15 Fixing device 16 Assembly block 16a Vertical positioning screw 16b Horizontal positioning screw 17 Vertical support rod 17a Engaging convex portion 18 Horizontal support rod 19 Abutment portion 19b1 Engaging pin 19a First abutment portion 19b Second contact portion 20 Camera 21 Lens 21g (Lens) image 22 Camera body 23 Attitude control mechanism 30 PC
31 Monitor screen 40 Reference plate P1 Positioning mark P1g Image (of positioning mark) T Work table

Claims (6)

A camera facing tool that is placed on a display surface to face the display and the camera,
a half mirror plate arranged with a first surface facing the display surface;
a support mechanism that is installed on a second surface of the half mirror plate opposite to the first surface and supports the first surface so as to abut against the display surface;
The half mirror plate has a first surface that comes into contact with the display surface and has a chamfered edge. The camera facing jig according to claim 1, wherein the half mirror plate is circular. The camera facing jig according to claim 1, wherein the half mirror plate is made of acrylic resin. the support mechanism includes a bar-shaped rod disposed on the second surface of the half mirror plate, a weight disposed on a tip side of the rod and having a diameter larger than a diameter of the rod, and a string-shaped member engaged with the rod and supported on a housing side of the display,
3. The camera facing jig according to claim 1, wherein the rod is disposed above the center of the half mirror plate on the display surface. the support mechanism includes a support leg having one end connected downward from a center of the second surface of the half mirror plate, and a fixing portion that supports the other end of the support leg and is disposed on an installation surface,
3. The camera facing jig according to claim 1, wherein the support legs are bendable metal wires, and the half mirror plate is supported by maintaining the metal wires in a bent state. the support mechanism has a support leg that is disposed below a center of the second surface of the half mirror plate via a connection portion,
3. The camera facing jig according to claim 1, wherein the connecting portion is a universal joint that is rotatably supported on one end of the support leg.

Images