Field angle testing device

Abstract

The utility model provides a field angle testing device, which comprises a bearing frame and at least two dials, the bearing frame comprises a fixed table, the fixed table is used for fixing a camera or projection equipment to be tested and can rotate around a first axis, the dials are annular and surround the fixed table, and the dials are arranged on the fixed table. Angle scales are arranged on the inner surfaces of the dials, the central axis of each dial is a second axis, the dials are arranged in a crossed mode and form a first staggered area and a second staggered area, the first axis penetrates through the center of the first staggered area and the center of the second staggered area, and the second axes intersect at one point. According to the device, the field angle of the camera or the projection equipment can be measured, and the efficiency of testing the field angles of the camera or the projection equipment in multiple directions can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical testing device technical field especially relates to a field of view angle testing arrangement. BACKGROUND

[0002] The use of devices such as cameras and projectors is becoming more and more widespread. Due to processing errors, the field of view (FOV) of a camera or a projector can have a large deviation from the theoretical design value. Therefore, it is necessary to measure the actual field of view of the camera or the projector in order to screen out unqualified cameras or projectors.

[0003] There are some testing devices for testing the field of view in the prior art. For example, patent document CN107478413A discloses a camera field of view testing device, which includes a fixed ring, a rotating shaft and a base. The inner periphery of the fixed ring is provided with a scale. The camera to be tested can be installed at the top end of the rotating shaft, and the camera can be located at the center of the fixed ring. The tester can obtain the field of view of the camera according to the scale at the boundary of the camera picture. However, if the field of view of the camera in multiple directions needs to be tested, the testing efficiency of the testing device in the prior art is low. SUMMARY

[0004] The utility model aims at at least solves one of prior art existing technical problems. For this reason, the utility model provides a field of view angle testing arrangement, and the device is favorable for improving the efficiency of testing the field of view of camera in multiple directions.

[0005] According to the field of view angle testing device of the utility model embodiment, including: bearing frame, including fixed platform, the fixed platform is used to fix the camera or projection equipment to be tested, the fixed platform can rotate around first axis, dial, the dial is equipped with at least two, the dial is annular and surrounds the fixed platform, the surface of the dial towards the fixed platform has angle scale, the central axis of the dial is second axis, the second axis is perpendicular to the first axis, each dial is crossed, each second axis is crossed in a point.

[0006] The field of view angle testing device has at least the following beneficial effects: the existing testing device only has one dial, and the user needs to read and measure the field of view angle in one direction first, then rotates the camera, and then reads the field of view angle in another direction. That is, in the prior art, the user can only read and measure the field of view angle in one direction according to the picture collected by the camera each time. However, the field of view angle testing device of the utility model has at least two dials, and the user can read and measure the field of view angles in at least two different directions in the picture collected by the camera at one time, so that the efficiency of testing the field of view angles of the camera in multiple directions by using the field of view angle testing device of the embodiment is higher. In addition, the fixing table of the utility model can rotate around the first axis, and the first axis passes through two staggered areas formed by the intersection of the dials, so that the user can rotate the fixing table to adjust the direction of the dials in the picture collected by the camera, so as to measure the field of view angle in the required direction.

[0007] According to some embodiments of the utility model, the fixing table can also rotate around the third axis and the fourth axis relative to the dial, and any two of the first axis, the third axis and the fourth axis are perpendicular to each other.

[0008] According to some embodiments of the utility model, the bearing frame further comprises a column, the bottom end of the column is connected with the dial, and the fixing table is connected to the top end of the column. The fixing table comprises: a first rotating body, the first rotating body is rotationally connected with the column, and the first rotating body can rotate 360 degrees around the first axis relative to the column; a second rotating body, the second rotating body is rotationally connected with the first rotating body, and the second rotating body can rotate around the third axis relative to the first rotating body; a third rotating body, the third rotating body is rotationally connected with the second rotating body, and the third rotating body can rotate around the fourth axis relative to the second rotating body; and clamping blocks, at least two clamping blocks are arranged, the clamping blocks are connected to the third rotating body, and at least one clamping block can move relative to the third rotating body to change the distance between the at least two clamping blocks.

[0009] According to some embodiments of the utility model, the bearing frame further comprises a column and a ball hinge, the bottom end of the column is connected with the dial, and the fixing table is connected to the top end of the column. The fixing table comprises at least two clamping blocks, the clamping blocks are connected with the top end of the column through the ball hinge, and at least one clamping block can move relative to the ball hinge to change the distance between the at least two clamping blocks.

[0010] According to some embodiments of the present application, the field angle testing device further comprises a support, the support comprises a plurality of first support portions and a second support portion, any two of the first support portions intersect with each other, the first support portion has a receiving hole, the second support portion is located in the receiving hole, the bottom end of the second support portion is connected with the bottom wall of the receiving hole, each of the dials is arranged in one of the receiving holes, the top of the second support portion clamps the dial in the vertical direction, and the two side walls of the receiving hole clamp the dial in the horizontal direction.

[0011] According to some embodiments of the present application, the field angle testing device comprises a level, and the top surface of at least one of the first support portions is provided with the level.

[0012] According to some embodiments of the present application, the field angle testing device further comprises a bottom pad, for the bottom surface of any one of the first support portions, one of the bottom pads is arranged at each end of the bottom surface, an adjusting mechanism is connected with the bottom pad, and the adjusting mechanism is used for adjusting the height difference between the bottom surface of the bottom pad and the bottom surface of the first support portion.

[0013] According to some embodiments of the present application, the bearing frame further comprises a column, the dials are arranged in an intersecting manner and form a first staggered area and a second staggered area, the second axis passes through the center of the first staggered area and the center of the second staggered area, the bottom end of the column is connected with the second staggered area, and the fixed table is connected to the top end of the column and is arranged in a spaced manner with the first staggered area.

[0014] According to some embodiments of the present application, the field of view angle testing device further comprises three lasers, the lasers can emit visible light, the lasers are installed on the dials, each of the second axes intersects at a base point, and three light beams emitted by the three lasers also intersect at the base point, and any two of the light beams are perpendicular to each other.

[0015] According to some embodiments of the present application, the field of view angle testing device comprises two dials, and the angle between the two dials is one of 90°, 73.74°, 67.38°, 58.72°, 46.40° and 41.11° when viewed along the extension direction of the first axis.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments, wherein:

[0018] Figure 1 is an axial view of the field of view angle testing device of the first embodiment of the present application;

[0019] Figure 2 is a partial schematic view of the bearing frame in Figure 1

[0020] Figure 3 is a schematic view of three laser beams emitted by the three lasers in the first embodiment;

[0021] Figure 4 is a schematic view of a picture captured by a camera when testing the horizontal field of view angle and the vertical field of view angle of the camera;

[0022] Figure 5 is a schematic view of a picture captured by a camera when testing the diagonal direction field of view angle of the camera;

[0023] Figure 6 is a schematic view of the positional relationship between a projected picture and a dial when testing the horizontal field of view angle and the vertical field of view angle of a projection device;

[0024] Figure 7 is a schematic view of a picture captured by a camera when testing the diagonal direction field of view angle of the camera in the second embodiment;

[0025] Figure 8 is a sectional view of the support and the dial of the first embodiment;

[0026] Figure 9 ​It is the sectional view of the support and the dial of the third embodiment of the utility model;

[0027] Figure 10 It is the axonometric view of the field angle testing equipment of the fourth embodiment of the utility model.

[0028] The drawings show that the utility model discloses a field angle testing device, 101 - dial, 102 - angle scale, 103 - second axis, 104 - disc outer pad, 105 - level, 106 - bearing frame, 107 - first knob, 108 - bottom pad, 109 - first support part, 110 - second support part, 111 - second knob, 112 - support, 113 - first staggered area, 114 - first axis, 115 - fixed table, 116 - stand, 117 - second staggered area, 118 - base point, 119 - clamping block, 120 - fourth axis, 121 - first semicircular groove, 122 - first rotator, 123 - splicing part, 124 - semicircular part, 125 - third axis, 126 - second rotator, 127 - second semicircular groove, 128 - third rotator, 129 - first light, 130 - through hole, 131 - diagonal line, 132 - horizontal reference line, 133 - vertical reference line, 134 - collection picture, 135 - first side, 136 - second side, 137 - projection picture, 138 - containing gap, 139 - containing hole, 140 - upper enclosing part, 141 - lower enclosing part, 142 - second light, 143 - third light. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0030] In the description of the utility model, it is understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Figure 1 A field-of-view testing device 100 according to a first embodiment of the present invention is shown. The field-of-view testing device 100 includes a support frame 106, and the support frame 106 includes a fixing stage 115 for fixing a camera or projection device (not shown) to be tested. Furthermore, the fixing stage 115 is rotatable relative to the scale 101 about a first axis 114. For example, as... Figure 2 As shown, the mounting platform 115 includes two spaced-apart clamping blocks 119 for holding the camera or projection device to be tested. At least one clamping block 119 is movable to adjust the distance between the two clamping blocks 119, thereby facilitating the user to install and remove the camera or projection device to be tested. In other embodiments, the number of clamping blocks 119 may be greater than two, and at least one clamping block 119 may be movable relative to the third rotating body 128 to change the distance between at least two clamping blocks 119, as long as the multiple clamping blocks 119 can jointly hold the camera or projection device.

[0034] like Figure 1 As shown, the field of view testing device 100 also includes two scale dials 101. The two scale dials 101 are of the same size and are annular. The inner surface of each scale dial 101 has angle markings 102, which include multiple graduation lines. The scale dials 101 surround the fixed platform 115. In this invention, the inner surface of the scale dial 101 refers to the surface of the scale dial 101 facing the fixed platform 115, and the outer surface of the scale dial 101 refers to the surface of the scale dial 101 facing away from the fixed platform 115. When the scale dial 101 is annular, the inner circumferential surface of the scale dial 101 is the inner surface of the scale dial 101, and the outer circumferential surface of the scale dial 101 is the outer surface of the scale dial 101.

[0035] The central axis of the dial 101 is the second axis 103, and the dial 101 is arranged around its own central axis. All the second axes 103 intersect at a single point, which is the base point 118. Figure 1In the illustrated embodiment, base point 118 is also the center of the dial 101. The dials 101 are intersected to form a first intersecting area 113 and a second intersecting area 117, with a first axis 114 passing through both the first and second intersecting areas 113 and 117. More specifically, the first axis 114 can pass through the center of the first intersecting area 113 and the center of the second intersecting area 117. The second axis 103 is a horizontal line, with the first intersecting area 113 located directly above the second intersecting area 117. The first axis 114 is vertically positioned, and the fixed platform 115 rotates around a vertical axis (the first axis 114).

[0036] In this embodiment, the dial 101 is annular; in other embodiments not shown, the dial 101 may also be an elliptical ring, a rectangular ring, a hexagonal ring, or other polygonal rings, etc. When the dial 101 is annular, the first axis 114 also passes through a base point (e.g., Figure 1 As shown), the scale lines of the angle scale 102 are evenly distributed; however, in order to ensure the accuracy of the detection, when the scale 101 is an elliptical ring, a rectangular ring, a hexagonal ring, or other polygonal ring, the scale lines of the angle scale 102 are not evenly distributed.

[0037] The following explains how to use the field of view testing device 100 to test the field of view of the camera.

[0038] First, the user mounts the camera on the mounting platform 115. For a mounted camera, the optical axis of its lens should coincide with the first axis 114 and the center of the lens should coincide with the base point 118 (the center of the dial 101). For example, for a camera already mounted on the mounting platform 115, its lens should be vertically upward and facing the first intersection area 113.

[0039] Then, connect the camera to the monitor so that the user can see the images captured by the camera. Alternatively, the camera can be connected to the monitor before mounting it on the mounting plate 115. Figure 4 The image shown is a captured image 134 displayed on the monitor when the field of view of the camera is being tested. The captured image 134 is square, that is, the first side 135 and the second side 136 of the captured image 134 are perpendicular to each other, and the length of the first side 135 and the length of the second side 136 are equal.

[0040] The user can then adjust the stage 115 to rotate it around the first axis 114 until the extension direction of the dial 101 in the captured image 134 is the same as the desired direction. In this way, the user can obtain a field of view in a specific direction. For example, as... Figure 4As shown, in the captured image 134, one dial 101 extends horizontally and the other dial 101 extends vertically, allowing the user to measure the camera's horizontal and vertical field of view. For example, as... Figure 5 As shown, the extension directions of the two dials 101 are the same as the extension directions of the two diagonals 131 of the captured image 134. One dial 101 extends along the first diagonal direction, and the other dial 101 extends along the second diagonal direction. The user can measure the field of view of the camera in the first diagonal direction and the second diagonal direction.

[0041] The captured image 134 has mutually perpendicular horizontal reference lines 132 and vertical reference lines 133. The horizontal reference line 132 is the perpendicular bisector of the first side 135, and the vertical reference line 133 is the perpendicular bisector of the second side 136. When testing the horizontal and vertical field of view, if the horizontal reference line 132 and the vertical reference line 133 are parallel to the two dials 101 respectively, and the intersection of these two reference lines coincides with the center of the first intersecting area 113, then the camera has been adjusted to a suitable angle. Similarly, when testing the field of view in the first and second diagonal directions, if the two diagonals 131 are parallel to the two dials 101 respectively, and the intersection of these two diagonals 131 coincides with the center of the first intersecting area 113, then the camera has been adjusted to a suitable angle. It should be noted that the horizontal reference line 132, the vertical reference line 133, and the diagonal line 131 can be displayed on the monitor after being processed by image software, and the surface of the lens may not necessarily have visible horizontal reference lines 132, vertical reference lines 133, and diagonal lines 131.

[0042] Next, the user can read the scale values ​​at the edge of the captured image (134) to obtain the field of view. For example, as... Figure 4 As shown, if the center of the first staggered region 113 (i.e. Figure 4 The scale at the intersection of the two diagonals 131 is 0°, and the scale at the first side 135 on the left side of the captured image 134 is 75° (angle scale 102 is not on the intersection of the two diagonals 131). Figure 4 As shown in the diagram, the scale value at the first side 135 on the right is -75°, so the horizontal field of view of the camera is 150°. After testing the horizontal and vertical field of view, if the user needs to test the diagonal field of view, the user can rotate the fixed stage 115 until the image 134 is captured. Figure 5 As shown, then test again.

[0043] Existing testing equipment only has one dial 101. Users need to first read and measure the field of view in one direction, then rotate the camera to read the field of view in another direction. That is, in the prior art, users can only read and measure the field of view in one direction at a time based on the captured image 134. However, for the field of view testing device 100 of this embodiment, since it has two dials 101, users can read and measure the field of view in two different directions (e.g., the horizontal field of view and the vertical field of view) in the captured image 134 at the same time. Therefore, the field of view testing device 100 of this embodiment is more efficient in testing the field of view of the camera in multiple directions.

[0044] The field of view testing device 100 of this invention can also test the field of view of a projection device. The following describes how to use this field of view testing device 100 to test the field of view of a projector. First, the user installs the projection device on the mounting platform 115. For a pre-installed projection device, the optical axis of its lens should coincide with the first axis 114, and the center of the lens should coincide with the base point 118 (the center of the scale 101). For example, for a projection device already installed on the mounting platform 115, its lens should be vertically upward and facing the first intersection zone 113. Then, the projection device is turned on, and light is emitted from the lens to form a projected image 137. The projected image 137 is rectangular, and a portion of the outer edge of the projected image 137 will fall on the scale 101 (e.g., ...). Figure 6 (As shown). Next, the user can read the scale at the edge of the projected image 137 to obtain the field of view of the projection device. The projected image 137 can be a pure white image or an image of other visible light colors, as long as the user can clearly see the edge of the projected image 137 on the scale 101.

[0045] In other embodiments not shown, the number of dials 101 may be greater than two (e.g., three, four, five, etc.), as long as the multiple second axes 103 belonging to different dials 101 still intersect at the base point 118, and the multiple dials 101 intersect to form a first intersecting area 113 and a second intersecting area 117. It should be noted that when the number of dials 101 is greater than two, all the intersecting dials 101 still form the first intersecting area 113 and the second intersecting area 117, and will not form other intersecting areas. When the number of dials 101 is greater than two, the user can read and measure the field of view in three or more directions simultaneously in the acquisition screen 134, which is beneficial for further improving the efficiency of the test camera in terms of the field of view in multiple directions.

[0046] For the field of view testing device 100 of the first embodiment, if viewed along the extension direction of the first axis 114 (e.g., from bottom to top), the included angle between the two scales 101 is 90° (e.g., ...). Figure 4 (As shown). The field of view testing device 100 of the first embodiment is suitable for measuring the lateral field of view and the longitudinal field of view in one operation. Furthermore, when the aspect ratio of the camera's captured image 134 is 1:1, the field of view testing device 100 of the first embodiment is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction in one operation.

[0047] In other embodiments, when viewed along the extension direction of the first axis 114, the included angle between the two dials 101 can also be 73.74°, 67.38°, 58.72°, 46.40°, or 41.11°.

[0048] For example, such as Figure 7 As shown, the length ratio of the second side 136 of the captured image 134 to the length of the first side 135 is 4:3, that is, the aspect ratio of the captured image 134 is 4:3. Figure 7 The angle between the two diagonals 131 of the captured image 134 is 73.74°. If the angle between the two dials 101 is also exactly 73.74°, then after the user adjusts the angle of the camera, the two dials 101 can be aligned with the two diagonals 131 respectively. That is, when the aspect ratio of the captured image 134 is 4:3, if the angle between the two dials 101 is set to 73.74°, then the field of view testing device 100 is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction at the same time, thereby improving the measurement efficiency of the field of view.

[0049] Similarly, when the aspect ratio of the captured image 134 is 3:2, if the included angle between the two dials 101 is set to 67.38°, then the field of view testing device 100 is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction at one time.

[0050] When the aspect ratio of the captured image 134 is 16:9, if the included angle between the two dials 101 is set to 58.72°, then the field of view testing device 100 is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction at one time.

[0051] When the aspect ratio of the captured image 134 is 21:9, if the included angle between the two dials 101 is set to 46.40°, then the field of view testing device 100 is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction at one time.

[0052] When the aspect ratio of the captured image 134 is 8:3, if the included angle between the two dials 101 is set to 41.11°, then the field of view testing device 100 is suitable for measuring the field of view in the first diagonal direction and the field of view in the second diagonal direction at one time.

[0053] like Figure 1 As shown, the support frame 106 also includes a column 116, the bottom end of which is connected to the dial 101, and a fixing platform 115 is connected to the top end of the column 116. For example, as Figure 3 As shown, the second staggered area 117 formed by the intersection of the two dials 101 has a through hole 130, and the bottom end of the column 116 passes through the through hole 130. Since the through hole 130 occupies a part of the second staggered area 117, the angle scale 102 can be designed as follows: the scale value at the center point of the first staggered area 113 is 0°, and from the first staggered area 113 to the second staggered area 117, the scale value on one half of the dial 101 (e.g., the left half) increases sequentially from 0° to 175°; the scale value on the other half of the dial 101 (e.g., the right half) also increases sequentially from 0° to 175°. Alternatively, the scale value of the left half of the dial 101 is 0° to 175°, and the scale value of the right half of the dial 101 is 0° to -175°.

[0054] like Figure 1 As shown, the field of view testing device 100 also includes a second support portion 110 and a plurality of first support portions 109, with any two first support portions 109 intersecting each other. Figure 1 In the illustrated embodiment, two first support portions 109 are provided, which are perpendicular to each other and intersect. Each first support portion 109 has a receiving notch 138, the shape of which is as follows: Figure 8 As shown, the accommodating notch 138 can be U-shaped. In Figure 1 In this device, the field-of-view testing apparatus 100 includes two first support parts 109, which are perpendicular to each other (viewed from a top-down angle). The bottom end of the second support part 110 is connected to the bottom wall of the receiving notch 138. The second support part 110 is disposed within the receiving notch 138, with each dial 101 disposed in one receiving notch 138. The top of the second support part 110 supports the dial 101, and the two side walls of the receiving notch 138 clamp the dial 101 in the horizontal direction. In this way, the second support part 110 can support two dials 101, and the first support parts 109 can limit the dials 101 in the horizontal direction. The first support parts 109 and the second support part 110 can provide good support for the dials 101.

[0055] It should be noted that the "clamping dial 101" in this utility model is not strictly limited to direct contact between the clamping component and the clamped object. Other objects (such as the outer pad 104 mentioned below) can also be provided between the clamping component and the clamped object, as long as the clamping component can ultimately clamp the clamped object. For example, as Figure 1 As shown, the field of view testing device 100 also includes an external pad 104. The external pad 104 is elastic and can be made of materials such as rubber or foam. Figure 8 As shown, an external pad 104 is provided between the second support 110 and the outer surface of the dial 101, and an external pad 104 is also provided between the side wall of the receiving notch 138 and the outer surface of the dial 101. During the assembly of the field of view testing device 100, the external pad 104 can dampen and buffer the dial 101, preventing damage or deformation of the dial 101 and affecting the accuracy of the test. Similarly, for "the top of the second support 110 supports the dial 101", the second support 110 can directly contact the dial 101, and an external pad 104 can also be provided between the second support 110 and the dial 101.

[0056] like Figure 9 As shown, in some other embodiments, the field of view testing device 100 has a first support portion 109 with a receiving hole 139, and the bottom end of a second support portion 110 is connected to the bottom wall of the receiving hole 139. The second support portion 110 is disposed within the receiving hole 139, and each dial 101 is disposed in one receiving hole 139. The top of the second support portion 110 and the top wall of the receiving hole 139 clamp the dial 101 in the vertical direction, and the two side walls of the receiving hole 139 clamp the dial 101 in the horizontal direction. For Figure 9 In the embodiment shown, the first support portion 109 includes a lower enclosure portion 141 and an upper enclosure portion 140, the upper enclosure portion 140 and the lower enclosure portion 141 being detachably connected to form a receiving hole 139. Figure 9 The lower enclosure 141 in the middle is equivalent to Figure 8 The first support part 109 in the middle. Figure 9 The first support portion 109 shown provides better wrapping and support for the dial 101.

[0057] like Figure 10 As shown, in some other embodiments, each dial 101 is surrounded by a first support 109, and the first support 109 and the dial 101 are integrally formed. Figure 10 The embodiment shown helps to reduce the total number of parts in the field of view testing device 100 and reduce the assembly steps of the device.

[0058] like Figure 1As shown, the bottom end of the column 116 is connected to the second staggered area 117, and the fixed platform 115 is connected to the top end of the column 116 and spaced apart from the first staggered area 113. The column 116 can move relative to the dial 101 along the first axis 114. The fact that the column 116 can move along the first axis 114 means that the fixed platform 115 can also move along the first axis 114, which makes the position of the camera or projection device on the first axis 114 adjustable so that the user can adjust the center of the lens of the camera or projection device to the center of the dial 101.

[0059] Specifically, such as Figure 1 As shown, the field of view testing device 100 also includes a second support portion 110. The bottom end of the second support portion 110 is fixedly connected to the first support portion 109, and the top end of the second support portion 110 supports the second staggered area 117. A column 116 is inserted inside the second support portion 110, and the column 116 can slide vertically relative to the second support portion 110, thereby enabling the column 116 to move relative to the dial 101 along the first axis 114.

[0060] The field-of-view testing device 100 may further include a lifting mechanism for driving the column 116 to move along the first axis 114. The lifting mechanism may include a first knob 107, a gear, and a rack. The rack extends vertically and its top end is connected to a fixed platform 115. The first knob 107 is connected to the gear, and the gear and rack mesh with each other. After the user rotates the first knob 107, the gear rotates, and the rack can rise and fall, thereby driving the fixed platform 115 to rise and fall (move along the first axis 114). In other embodiments, the combination of gear and rack may be replaced by a combination of lead screw and nut, with the first knob 107 connected to the lead screw and the nut connected to the fixed platform 115. Alternatively, in other embodiments, the lifting mechanism may be configured as a linear drive module (e.g., a belt module, lead screw module, etc.) that does not require manual knob rotation by the user.

[0061] In order to enable the fixed platform 115 to move along the first axis 114, in some embodiments, the column 116 may also be telescopic, capable of extending and retracting along the first axis 114. For example, as Figure 10 As shown, the column 116 includes multiple nested expansion joints, the bottom end of the column 116 is fixed to the second staggered area 117, and the height of the column 116 is adjustable.

[0062] In some embodiments, the mounting platform 115 is also rotatable relative to the dial 101 about a third axis 125 and a fourth axis 120, where any two of the first axis 114, the third axis 125, and the fourth axis 120 are perpendicular to each other. This allows the mounting platform 115 to rotate about multiple axes, providing high adjustability. This facilitates the user in adjusting the angle of the camera or projection device on the mounting platform 115 so that the center of the camera or projection device's lens is located at the center of the dial 101, and that the optical axis of the lens coincides with the first axis 114.

[0063] For example, such as Figure 2 As shown, in one embodiment, the fixed platform 115 includes a first rotating body 122, a second rotating body 126, a third rotating body 128, and two clamping blocks 119. The first rotating body 122 is rotatably connected to the column 116, and the first rotating body 122 can rotate 360° relative to the column 116 about a first axis 114. That is, the fixed platform 115 can rotate 360° about the first axis 114, which allows the field of view testing device 100 to measure the field of view in any direction. The first rotating body 122 includes a plug-in portion 123 and a semi-circular portion 124. The plug-in portion 123 is cylindrical and rotatably inserted into the column 116, and the semi-circular portion 124 is fixed to the top end of the plug-in portion 123. The second rotating body 126 is rotatably connected to the first rotating body 122, and the second rotating body 126 can rotate relative to the first rotating body 122 about a third axis 125. The third rotating body 128 is rotatably connected to the second rotating body 126, and the third rotating body 128 can rotate relative to the second rotating body 126 about a fourth axis 120. More specifically, the second rotating body 126 has a first semicircular groove 121 with its opening facing downward and a second semicircular groove 127 with its opening facing upward. A semicircular portion 124 is rotatably disposed within the first semicircular groove 121, thereby realizing the rotatable connection between the second rotating body 126 and the first rotating body 122. The third rotating body 128 is semicircular in shape and is rotatably disposed within the second semicircular groove 127, thereby realizing the rotatable connection between the third rotating body 128 and the second rotating body 126. A clamping block 119 is connected to the third rotating body 128, and at least one clamping block 119 can move relative to the third rotating body 128 to change the distance between at least two clamping blocks 119. Figure 2 In this configuration, the first axis 114 coincides with the central axis of the column 116 itself, the third axis 125 is located on the bottom surface of the semicircular portion 124 and extends in the left-right direction, and the fourth axis 120 is located on the top surface of the third rotating body 128 and extends in the front-back direction. The third axis 125 and the fourth axis 120 are perpendicular to each other but do not intersect, and both the third axis 125 and the fourth axis 120 intersect and are perpendicular to the first axis 114.

[0064] For example, in another embodiment not shown, the combination of the first rotating body 122, the second rotating body 126, and the third rotating body 128 can be replaced by a ball joint, with the clamping block 119 connected to the top of the column 116 via the ball joint. At least one clamping block 119 can move relative to the ball joint to change the distance between at least two clamping blocks 119. For example, the ball joint includes an interconnected ball socket and a ball head, with the ball head connected to the column 116 and the ball socket connected to the clamping block 119. The ball joint can also be used to allow a camera or projection device on the mounting platform 115 to rotate around three different axes.

[0065] To facilitate user confirmation of whether the center of the camera or projection device's lens is located at the center of the scale 101, in some embodiments, the field of view testing device 100 further includes three lasers. The lasers emit visible light; one laser is mounted in the first staggered area 113 and faces the fixed stage 115, while the other two lasers are mounted on different scales 101. The lasers can be mounted on the inner surface of the scale 101, and the lasers are not on the inner surface of the scale 101. Figure 3 As shown in the text, but Figure 3 The diagram illustrates the light emitted by the lasers. A first laser is mounted in the first intersecting area 113, emitting a first beam 129 vertically downwards. A second laser is mounted at the right end of one of the dials 101, emitting a second beam 142 horizontally to the left. A third laser is mounted at the front end of another dial 101, emitting a third beam 143 horizontally backwards. The three beams from the three lasers intersect at a base point 118, with any two beams perpendicular to each other. As mentioned above, the base point 118 is the center of the dial 101. Therefore, the intersection of the three beams is the center of the dial 101. Since the laser light is visible, the intersection of the three beams is also visible. The user can visually determine whether the intersection coincides with the center of gravity of the lens, thus determining whether the center of the lens is located at the center of the dial 101. In other embodiments not shown, all lasers may also be mounted on the same dial 101, provided that the intersection of the three beams coincides with the base point 118.

[0066] like Figure 1 As shown, the field of view testing device 100 may further include a level 105, with at least one level 105 mounted on the top surface of the first support 109. The user can determine whether the field of view testing device 100 is placed horizontally by observing the level 105. If the field of view testing device 100 is not placed horizontally, the user can adjust its placement to prevent tilting and thus ensure accuracy. The level 105 may be a bubble level, an electronic level, etc.

[0067] Furthermore, in some embodiments, for each first support portion 109, a level 105 is installed at each end of its top surface (e.g., Figure 10 (As shown). Users can determine the tilt direction of the field of view testing device 100 by combining the status of all the levels 105, which helps users quickly determine how to adjust the placement of the field of view testing device 100.

[0068] like Figure 1 As shown, the field of view testing device 100 also includes a bottom pad 108 and an adjustment mechanism. For the bottom surface of any first support portion 109, a bottom pad 108 is installed at each end of the bottom surface (e.g., ...). Figure 8 (As shown). Each adjustment mechanism is connected to a bottom pad 108. The adjustment mechanism is used to adjust the height difference between the bottom surface of the bottom pad 108 and the bottom surface of the first support 109. The adjustment mechanism includes a second knob 111, which the user can rotate to adjust the height difference between the bottom surface of the bottom pad 108 and the bottom surface of the first support 109. If the field of view testing device 100 is tilted, the user can correct the attitude of the field of view testing device 100 through the adjustment mechanism. The way the second knob 111 drives the pad to rise and fall is the same as the way the first knob 107 drives the fixed platform 115 to rise and fall. The second knob 111 and the bottom pad 108 can be driven by gears and racks, or by lead screws and nuts. The adjustment mechanism is set as a linear drive module (such as a belt module, lead screw module, etc.) that does not require the user to manually turn the knob, which will not be described in detail here.

[0069] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A field-of-view testing device, characterized in that, include: The support frame includes a fixed platform for fixing a camera or projection device to be tested, and the fixed platform is rotatable about a first axis; The scale includes at least two scales, which are annular and surround the fixed platform. The surface of the scale facing the fixed platform has angular markings. The central axis of the scale is a second axis, which is perpendicular to the first axis. The scales intersect each other, and each second axis intersects at a point.

2. The field of view testing device according to claim 1, characterized in that, The fixed platform can also rotate about a third axis and about a fourth axis relative to the dial, with any two of the first, third, and fourth axes being perpendicular to each other.

3. The field of view testing device according to claim 2, characterized in that, The support frame further includes a column, the bottom end of which is connected to the dial, and a fixing platform is connected to the top end of the column. The fixing platform includes: A first rotating body is rotatably connected to the column, and the first rotating body can rotate 360° relative to the column around the first axis. The second rotating body is rotatably connected to the first rotating body, and the second rotating body can rotate relative to the first rotating body about the third axis; A third rotating body is rotatably connected to the second rotating body, and the third rotating body can rotate relative to the second rotating body about the fourth axis; The clamping blocks are provided at least two, and the clamping blocks are connected to the third rotating body. At least one of the clamping blocks is movable relative to the third rotating body to change the distance between the at least two clamping blocks.

4. The field of view testing device according to claim 2, characterized in that, The support frame also includes a column and a ball joint, the bottom end of the column is connected to the dial, and the fixed platform is connected to the top end of the column; The fixed platform includes at least two clamping blocks, which are connected to the top of the column via the ball joint. At least one of the clamping blocks is movable relative to the ball joint to change the distance between at least two of the clamping blocks.

5. The field of view testing device according to claim 1, characterized in that, The field of view testing device also includes a bracket, which includes a plurality of first support parts and a second support part. Any two first support parts intersect each other. The first support part has a receiving hole. The second support part is located in the receiving hole. The bottom end of the second support part is connected to the bottom wall of the receiving hole. Each dial is disposed in one of the receiving holes. The top of the second support part and the top wall of the receiving hole clamp the dial in the vertical direction. The two side walls of the receiving hole clamp the dial in the horizontal direction. Alternatively, the field of view testing device may further include a bracket, the bracket including a plurality of first support parts and a second support part, any two first support parts intersecting each other, the first support parts having a receiving notch, the second support part being located within the receiving notch, the bottom end of the second support part being connected to the bottom wall of the receiving notch, each of the dials being disposed within one of the receiving notches, the top of the second support part supporting the dial, and the two side walls of the receiving notch clamping the dial in the horizontal direction; Alternatively, the field of view testing device may further include a bracket, the bracket including a plurality of first support parts, any two of the first support parts intersecting each other, each dial being integrally formed with one of the first support parts, and each dial being surrounded by one of the first support parts.

6. The field of view testing device according to claim 5, characterized in that, The field of view testing device includes a level, and the level is mounted on the top surface of at least one of the first supports.

7. The field of view testing device according to claim 5, characterized in that, The field of view testing device also includes: For the bottom surface of any of the first support portions, a bottom pad is installed at each of the two ends of the bottom surface; An adjustment mechanism is provided, which is connected to the bottom pad and is used to adjust the height difference between the bottom surface of the bottom pad and the bottom surface of the first support.

8. The field of view testing device according to claim 1, characterized in that, The support frame also includes a column, and the dials are arranged to intersect to form a first intersecting area and a second intersecting area. The second axis passes through the center of the first intersecting area and the center of the second intersecting area. The bottom end of the column is connected to the second intersecting area, and the fixed platform is connected to the top end of the column and is spaced apart from the first intersecting area. The column can move relative to the dial along the first axis; or the column itself can extend or retract along the first axis.

9. The field of view testing device according to claim 1, characterized in that, The field of view testing device also includes three lasers, which are capable of emitting visible light. The lasers are mounted on the scale, and each of the second axes intersects at a base point. The three rays emitted by the three lasers also intersect at the base point, and any two rays are perpendicular to each other.

10. The field-of-view testing device according to any one of claims 1 to 9, characterized in that, The field of view testing device includes two scales. When viewed along the extension direction of the first axis, the included angle between the two scales is one of 90°, 73.74°, 67.38°, 58.72°, 46.40°, and 41.11°.

Images