A camera lens fast focus test system and test method

Abstract

The present invention discloses a camera lens fast focus test system, including a processor, a support platform, a test target, a test camera body, a first drive device, a second drive device, a display screen and an infrared rangefinder; a sliding assembly is installed at the left end of the support platform, the test target is installed on the sliding assembly, the first drive device is connected to the test target, and the first drive device is used to drive the test target to move left or right on the support platform; the second drive device is installed at the right end of the support platform, the test camera body is installed on the second drive device, and the second drive device can drive the test camera body to move. In addition, the present invention also discloses a camera lens fast focus test method. The present invention is mainly used to test whether the error between the theoretical focal length value and the actual focal length value of the camera lens is within a reasonable range to ensure the quality of the lens.

Description

Technical Field

[0001] The present invention relates to the technical field of camera lens testing, and in particular to a camera lens rapid focus test system; in addition, the present invention also relates to a camera lens rapid focus test method. Background Art

[0002] There are many types of cameras, including waterproof digital cameras, and their basic working principles are the same; converting optical image signals into electrical signals for storage or transmission. When we shoot an object, the light reflected from the object is collected by the camera lens and focused on the light-receiving surface of the camera device (such as the target surface of the camera tube). The camera device then converts the light into electrical energy, which is a "video signal". The photoelectric signal is very weak and needs to be amplified by a pre-amplifier circuit, and then processed and adjusted by various circuits. The final standard signal can be sent to a recording medium such as a video recorder for recording, or transmitted through a transmission system or sent to a monitor for display.

[0003] The focal length is fixed, and the scene in front of you cannot be brought closer or farther away. The advantage of fixed focus over zoom is that the image quality is better and the aperture is easier to increase. The disadvantage is that it cannot be zoomed, and the photographer can only rely on the movement of the composition. For example, the commonly used 50mm lens is a fixed focus lens. The focal length refers to the position where the image is focused after parallel light hits the lens.

[0004] In actual use, we need to test the camera lens after focusing to see whether the error between the actual focus value (actual focal length value) and the theoretical focus value (theoretical focal length value) is within a reasonable range; if it is not within a reasonable range, the lens needs to be re-focused to ensure the uniform quality of the factory lens. Summary of the invention

[0005] The purpose of the present invention is to provide a camera lens fast focus test system, which is mainly used to test whether the error between the theoretical focal length value and the actual focal length value of the camera lens is within a reasonable range to ensure the quality of the lens;

[0006] In addition, the invention also discloses a method for quickly focusing a camera lens.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A camera lens fast focus test system comprises a processor, a support platform, a test target, a test camera body, a first drive device, a second drive device, a display screen and an infrared rangefinder;

[0009] A sliding assembly is installed at the left end of the support platform, the test target is installed on the sliding assembly, and the first driving device is connected to the test target, and the first driving device is used to drive the test target to move left or right on the support platform;

[0010] The second driving device is installed at the right end of the supporting platform, the test camera body is installed on the second driving device, and the second driving device can drive the test camera body to move;

[0011] The display screen and the processor are installed at the right end of the supporting platform, the infrared rangefinder is fixedly installed on the side of the test camera body, and the infrared rangefinder, the display screen and the test camera body are all connected to the processor.

[0012] Among them, the sliding assembly includes a first slide rail, a second slide rail and a slider slidably arranged on the first slide rail and the second slide rail installed on the supporting platform. The two sliders are linked by a connecting plate, and the test target is fixed on the connecting plate by bolts; the first driving device is connected to the connecting plate.

[0013] Further optimized, the first drive device is a gear rack drive device, a screw drive device or a pulley drive device.

[0014] As an option, the gear rack drive device includes a gear, a rack and a motor, the gear is connected to the motor, the motor is mounted on the connecting plate, the rack is mounted on the supporting platform and is parallel to the first slide rail and the second slide rail, and the gear and the rack are meshed with each other.

[0015] As an option, the screw drive device includes a first screw, a first screw nut and a first drive motor. The first screw is installed on the support platform through a bearing seat. The first screw nut is installed on the connecting plate and cooperates with the first screw. The first drive motor is connected to the first screw.

[0016] As an option, the pulley drive device includes a first pulley, a second pulley, a belt and a second drive motor. The first pulley and the second pulley are rotatably installed on a support platform, the belt is wound around the first pulley and the second pulley, the second drive motor is connected to the first pulley or the second pulley, and the belt is fixedly connected to the connecting rod.

[0017] Among them, the second driving device includes a base, a second lead screw, a second lead screw nut and a third driving motor. A groove is provided on the base, and plugs are provided at both ends of the groove. The second lead screw is located in the groove and is rotatably installed on the plug. The second lead screw nut cooperates with the second lead screw. A mounting plate is connected to the second lead screw nut. The test camera body is mounted on the mounting plate. A third slider is installed at the lower end of the mounting. A third slide rail is provided on the base. The third slider and the third slide rail can cooperate with each other; the third driving motor is connected to the second lead screw.

[0018] Preferably, a bayonet mount is provided on the test camera body.

[0019] It is further defined that the mount is an LPL mount, an E mount or an EF mount.

[0020] The supporting platform is composed of a plurality of supporting rods welded together, and a plurality of supporting legs are arranged at the lower end of the supporting platform.

[0021] In addition, the present invention also discloses a method for quickly focusing a camera lens, comprising the following steps: step 1: mounting the lens to be tested on a test camera body through a bayonet pair;

[0022] Step 2: Start the first driving device, which drives the test target to move and then stops;

[0023] Step 3: The laser rangefinder monitors the distance between the test camera body and the test target. Each distance value corresponds to a standard focal length value in the processor.

[0024] Step 4: Start the test camera body. After the test camera body emits infrared rays, the lens automatically adjusts the focal length according to the distance measured by the infrared rays, and transmits the actual focal length value after automatic adjustment to the processor. The processor compares the standard focal length value and the actual focal length value of the test target at that position, and outputs the test results on the display.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The invention mainly consists of a processor, a supporting platform, a test target, a test camera body, a first driving device, a second driving device, a display screen and an infrared rangefinder. In actual use, it is only necessary to connect a lens to be tested with the test camera body; then the test target is pushed, and the distance between the test target and the test camera body is detected by the infrared rangefinder; and the detected distance is matched with a standard focal length value of the position pre-stored in the processor; at the same time, infrared rays emitted by the test camera body contact the test target, and the camera lens is automatically adjusted after reflection, and the camera will have an actual focal length value at this time; the processor compares the standard focal length value used for the test target position with the actual focal length value of the test camera body, so as to confirm whether the actual focal length value is within a reasonable error range; in actual use, multiple tests are performed, and if the error range of the test is large, the lens needs to be readjusted; in this way, the camera lens can be debugged, and the factory quality of the lens can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the connection relationship between the test camera body and the second driving device of the present invention.

[0030] Figure markings: 1-processor, 2-support platform, 3-test target, 4-test camera body, 5-second driving device, 6-display screen, 7-infrared rangefinder, 8-sliding assembly, 9-first slide rail, 10-second slide rail, 11-slider, 12-connecting plate, 13-base, 14-second lead screw, 15-second lead screw nut, 16-third driving motor, 17-plug, 18-mounting plate, 19-bayonet seat, 20-support foot. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figure 1 and Figure 2 , this embodiment discloses a camera lens fast focus test system, including a processor 1, a support platform 2, a test target 3, a test camera body 4, a first drive device, a second drive device 5, a display screen 6 and an infrared rangefinder 7;

[0034] A sliding assembly 8 is installed at the left end of the support platform 2, and the test target 3 is installed on the sliding assembly 8. The first driving device is connected to the test target 3, and the first driving device is used to drive the test target 3 to move left or right on the support platform 2;

[0035] The second driving device 5 is installed at the right end of the supporting platform 2, and the test camera body 4 is installed on the second driving device 5. The second driving device 5 can drive the test camera body 4 to move;

[0036] The display screen 6 and the processor 1 are installed at the right end of the supporting platform 2 , the infrared rangefinder 7 is fixedly installed on the side of the test camera body 4 , and the infrared rangefinder 7 , the display screen 6 and the test camera body 4 are all connected to the processor 1 .

[0037] The present invention mainly consists of a processor 1, a support platform 2, a test target 3, a test camera body 4, a first drive device, a second drive device 5, a display screen 6 and an infrared rangefinder 7. In actual use, it is only necessary to connect the lens to be tested with the test camera body 4; then push the test target 3, and detect the distance between the test target 3 and the test camera body 4 through the infrared rangefinder 7; and correspond the detected distance with the standard focal length value of the position pre-stored in the processor 1; at the same time, the infrared light emitted by the test camera body 4 contacts the test target 3, and the camera lens is automatically adjusted after reflection, and the camera will have an actual focal length value at this time; the processor 1 compares the standard focal length value used for the test target 3 position with the actual focal length value of the test camera body 4, so as to confirm whether the actual focal length value is within a reasonable error range; in actual use, multiple tests are performed, and if the error range of the test is large, the lens needs to be readjusted; in this way, the debugging of the camera lens can be realized, thereby ensuring the factory quality of the lens.

[0038] It should be noted that the processor 1 used in this embodiment can be the processor 1 in the prior art, which is mainly used to realize the pre-storage of data and the simple comparison of data; its specific structure and the connection method with the infrared rangefinder 7, the display screen 6, and the test camera body 4 are clear and achievable to the technicians in this field, and will not be repeated here.

[0039] Among them, the sliding assembly 8 includes a first slide rail 9, a second slide rail 10 installed on the support platform 2, and a slider 11 slidably arranged on the first slide rail 9 and the second slide rail 10. The two sliders 11 are linked by a connecting plate 12, and the test target 3 is fixedly mounted on the connecting plate 12 by bolts; the first driving device is connected to the connecting plate 12; in this way, in actual use, the test target 3 can be more stable when moving.

[0040] In this embodiment, the first driving device is a gear rack driving device, which includes a gear, a rack and a motor, the gear is connected to the motor, the motor is installed on the connecting plate 12, the rack is installed on the supporting platform 2 and is parallel to the first slide rail 9 and the second slide rail 10, and the gear and the rack are meshed with each other. In this way, when the test target 3 needs to be moved, it is only necessary to start the motor to rotate the gear. Since the rack is fixedly installed on the supporting platform 2, the motor rotation can drive the connecting plate 12 to move, thereby moving the test target 3; there is no need to manually move the position of the test target 3, which is more convenient to use.

[0041] Among them, the second driving device 5 includes a base 13, a second lead screw 14, a second lead screw nut 15 and a third driving motor 16. A groove is provided on the base 13, and plugs 17 are provided at both ends of the groove. The second lead screw is located in the groove and is rotatably installed on the plug 17. The second lead screw nut 15 cooperates with the second lead screw. A mounting plate 18 is connected to the second lead screw nut 15. The test camera body 4 is installed on the mounting plate 18, and a third slider is installed at the lower end of the installation. A third slide rail is provided on the base 13, and the third slider and the third slide rail can cooperate with each other; the third driving motor 16 is connected to the second lead screw 14.

[0042] In this way, the position of the test camera body 4 can be adjusted.

[0043] The test camera is provided with a bayonet mount 19 , which makes it easier and more convenient to connect the lens and the test camera body 4 .

[0044] The bayonet mount 19 is an LPL bayonet mount, an E bayonet mount or an EF bayonet mount.

[0045] The support platform 2 is composed of a plurality of support rods welded together, and a plurality of support legs 20 are arranged at the lower end of the support platform 2 .

[0046] This embodiment also discloses a method for quickly testing the focus of a camera lens, comprising the following steps:

[0047] Step 1: Mount the lens to be tested on the test camera body 4 through the bayonet pair;

[0048] Step 2: Start the first driving device, which drives the test target 3 to move and then stops;

[0049] Step 3: The laser rangefinder monitors the distance value between the test camera body 4 and the test target 3, and each distance value corresponds to a standard focal length value in the processor 1;

[0050] Step 4: Start the test camera body 4. After the test camera body 4 emits infrared rays, the lens automatically adjusts the focal length according to the distance measured by the infrared rays, and transmits the actual focal length value after automatic adjustment to the processor 1. The processor 1 compares the standard focal length value and the actual focal length value of the test target 3 at the moved position, and outputs the test result on the display.

[0051] Embodiment 2

[0052] This embodiment is basically the same as the first embodiment, except that the first drive device is a screw drive device, which includes a first screw, a first screw nut and a first drive motor. The first screw is installed on the support platform 2 through a bearing seat, the first screw nut is installed on the connecting plate 12 and cooperates with the first screw, and the first drive motor is connected to the first screw.

[0053] Embodiment 3

[0054] This embodiment is basically similar to the first embodiment, except that the first driving device is a pulley driving device. The pulley driving device includes a first pulley, a second pulley, a belt and a second driving motor, the first pulley and the second pulley are rotatably mounted on the supporting platform 2, the belt is wound on the first pulley and the second pulley, the second driving motor is connected to the first pulley or the second pulley, and the belt is fixedly connected to the connecting rod.

[0055] Wherein, the first pulley and the second pulley are both toothed pulleys, so that the belt can be prevented from slipping during the actual driving process.

[0056] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A camera lens fast focus test system, comprising a processor, characterized in that: It includes a supporting platform, a test target, a test camera body, a first driving device, a second driving device, a display screen and an infrared rangefinder; A sliding assembly is installed at the left end of the support platform, the test target is installed on the sliding assembly, and the first driving device is connected to the test target, and the first driving device is used to drive the test target to move left or right on the support platform; The second driving device is installed at the right end of the supporting platform, the test camera body is installed on the second driving device, and the second driving device can drive the test camera body to move; The display screen and the processor are installed at the right end of the support platform, the infrared rangefinder is fixedly installed on the side of the test camera body, and the infrared rangefinder, the display screen and the test camera body are all connected to the processor; The sliding assembly includes a first slide rail, a second slide rail and a slider slidably arranged on the first slide rail and the second slide rail, the two sliders are linked by a connecting plate, and the test target is fixedly mounted on the connecting plate by bolts; the first driving device is connected to the connecting plate; The first driving device is a gear rack driving device, a screw driving device or a pulley driving device.

2. A camera lens fast focus test system according to claim 1, characterized in that: The gear rack driving device includes a gear, a rack and a motor. The gear is connected to the motor, the motor is installed on the connecting plate, the rack is installed on the supporting platform and is parallel to the first slide rail and the second slide rail, and the gear and the rack are meshed with each other.

3. A camera lens fast focus test system according to claim 1, characterized in that: The screw drive device includes a first screw, a first screw nut and a first drive motor. The first screw is installed on the support platform through a bearing seat. The first screw nut is installed on the connecting plate and cooperates with the first screw. The first drive motor is connected to the first screw.

4. A camera lens fast focus test system according to claim 1, characterized in that: The pulley drive device includes a first pulley, a second pulley, a belt and a second drive motor. The first pulley and the second pulley are rotatably installed on a support platform. The belt is wound around the first pulley and the second pulley. The second drive motor is connected to the first pulley or the second pulley, and the belt is fixedly connected to a connecting rod.

5. A camera lens fast focus test system according to any one of claims 1 to 4, characterized in that: The second driving device includes a base, a second lead screw, a second lead screw nut and a third driving motor. A groove is provided on the base, and plugs are provided at both ends of the groove. The second lead screw is located in the groove and is rotatably mounted on the plug. The second lead screw nut cooperates with the second lead screw. A mounting plate is connected to the second lead screw nut. The test camera body is mounted on the mounting plate. A third slider is installed at the lower end of the mounting. A third slide rail is provided on the base. The third slider and the third slide rail can cooperate with each other. The third driving motor is connected to the second lead screw.

6. A camera lens fast focus test system according to claim 5, characterized in that: A bayonet seat is arranged on the test camera body.

7. A camera lens fast focus test system according to claim 6, characterized in that: The supporting platform is composed of a plurality of supporting rods welded together, and a plurality of supporting feet are arranged at the lower end of the supporting platform.

8. A method for testing a camera lens fast focus using the camera lens fast focus testing system according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Install the lens to be tested on the test camera body through the bayonet pair; Step 2: Start the first driving device, which drives the test target to move and then stops; Step 3: The laser rangefinder monitors the distance between the test camera body and the test target. Each distance value corresponds to a standard focal length value in the processor. Step 4: Start the test camera body. After the test camera body emits infrared rays, the lens automatically adjusts the focal length according to the distance measured by the infrared rays, and transmits the actual focal length value after automatic adjustment to the processor. The processor compares the standard focal length value and the actual focal length value of the test target at the moved position, and outputs the test results on the display.

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