Optical zoom calibration jig

Abstract

An optical zoom calibration jig comprises a jig outer contour, an illumination lamp, a jig support and a jig body. The outline of the jig is a shading plate, and the jig is used for installing an illumination lamp and isolating the influence of ambient light on a calibration result; the illumination lamp is used for providing a stable light source for calibration; the jig support is a jig aluminum profile frame and used for fixing the jig body. A product fixing base is arranged at the front end of the jig body and is used for fixing a calibrated product; the rear end of the jig body serves as a chart map positioning mechanism and is used for fixing a chart map, and the chart map is used for calibrating a product. The optical zoom calibration device is used for measuring the offset between two lenses with different focal lengths, the phenomenon of picture dislocation occurring during camera switching in the optical zoom process is reduced, picture switching is smoother, and the optical zoom calibration effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, in particular to an optical zoom calibration fixture. Background Art

[0002] In today's technological landscape, optical zoom technology has become an indispensable component across numerous industries. From consumer digital cameras and smartphone cameras to professional photography equipment, security surveillance systems, medical imaging equipment, and precision measuring instruments used in industrial inspection, optical zoom technology is ubiquitous. With the continuous advancement of optical technology, users are increasingly demanding the performance of optical zoom systems. Whether pursuing clearer, more realistic images or achieving higher-precision dimensional and distance measurements in measurement and inspection, accurate optical zoom calibration has become a critical factor.

[0003] Due to the complexity and diversity of optical zoom systems and the special requirements of different application scenarios, current optical zoom calibration methods have many challenges and shortcomings:

[0004] 1. Optical zoom lenses of different types and specifications may require specific calibration equipment and methods. There is a lack of a universal and convenient calibration process applicable to various lenses.

[0005] 2. Some high-precision calibration equipment and complex calibration processes lead to high costs, limiting their widespread use in some cost-sensitive applications.

[0006] 3. The calibration process still requires a lot of manual intervention and operation, which is inefficient and prone to human errors. Summary of the Invention

[0007] The utility model provides an optical zoom calibration jig, which is used to measure the offset between two lenses with different focal lengths, reduce the image misalignment phenomenon when switching cameras during the optical zoom process, make the image switching smoother, and ensure the optical zoom calibration effect.

[0008] An optical zoom calibration jig, comprising: a jig outline, a lighting lamp, a jig bracket and a jig body;

[0009] The outer contour of the fixture is a light shield, which is used to install a light and isolate the influence of ambient light on the calibration results;

[0010] The illumination lamp is used to provide a stable light source for calibration;

[0011] The fixture bracket is a fixture aluminum profile frame used to fix the fixture body;

[0012] The front end of the fixture body is a fixed product base for fixing the calibrated product;

[0013] The rear end of the fixture body serves as a chart positioning mechanism for fixing the chart, which is used to calibrate the product.

[0014] Preferably, the fixed product base of the utility model is provided with a positioning base and a positioning base plate; the positioning base is provided with a positioning base screw hole for fixing the positioning base plate and the aluminum profile; the positioning base plate is provided with a cavity, and a plurality of screw holes are provided in the cavity, and the cavity is used to place the product-carrying movable adjustable positioning plate for contacting the calibrated product.

[0015] Preferably, the utility model provides openings on both sides of the lower end of the product-carrying movable adjustment plate for adjusting the product positioning height; limit blocks are provided on both sides of the step surface at the upper end of the product-carrying movable adjustment plate, and the limit blocks are used to fix the product so that the product placed on the product-carrying movable adjustment plate cannot move forward, backward, left, right, up, or down.

[0016] Preferably, the chart positioning mechanism of the present invention is provided with a single-track aluminum profile and an aluminum profile fixed connection block for fixing the chart, so that the chart can be adjusted up and down on the positioning mechanism.

[0017] Preferably, the side length of each grid in the chart of the present invention is 36±0.1mm, the size of the entire chart is 432mm×288mm, and blank spaces are left symmetrically around the chart, wherein the upper and lower blank widths are 46±0.5mm, and the left and right blank widths are 34±0.5mm. The size of the entire chart is 500mm×380mm.

[0018] Preferably, the lighting lamp of the present invention adopts a D65 light source with a color temperature of 6500K.

[0019] Preferably, the illumination intensity of the illumination lamp of the present invention is between 400 Lux and 800 Lux; the brightness of the collected image, the average grayscale value is 40±5, and the average grayscale value of the white block is 0±5.

[0020] Preferably, the distance between the positioning base of the present invention and the chart positioning mechanism is 40±1 cm.

[0021] The optical zoom calibration fixture using the above technical solution achieves efficient and convenient optical zoom calibration, is simple and convenient to operate, and greatly reduces the time and labor costs required for calibration. It also reduces the complexity and cost of equipment debugging and maintenance. The specific performance is as follows:

[0022] 1. Cost saving: Compared with purchasing professional optical zoom equipment, homemade fixtures can significantly reduce costs.

[0023] 2. Personalized customization: It can be designed and produced according to your specific needs and usage scenarios to meet unique experimental, research or creative needs.

[0024] 3. Flexibility: The fixture can be adjusted and improved at any time according to the actual situation to achieve a more ideal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the base of the fixed product of the utility model;

[0026] Figure 2 This is the structural diagram of the aluminum profile positioning and installation of the utility model;

[0027] Figure 3 This is the overall structure diagram of the utility model.

[0028] Among them: 1. Limit block; 2. Product-carrying movable adjustment plate; 3. Screw hole; 4. Positioning base plate; 5. Positioning base screw hole; 6. Positioning base; 7. Chart; 8. Single-track aluminum profile; 9. Sunshade; 10. Four-track aluminum profile; 11. Double-track aluminum profile; 12. First aluminum profile fixing connection block; 13. Second aluminum profile fixing connection block; 14. Aluminum profile; 15. Lighting lamp. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below with reference to the accompanying drawings:

[0030] As attached Figure 1 As shown, the product-carrying movable and adjustable positioning plate 2, the limit block 1, and the positioning base plate 4 are designed according to the product size. The positioning base 6 size is designed according to the positioning base plate 4 and a cavity is opened at a specific position to ensure the adaptation between the structural parts; 5 screw holes are opened on each side of the lower end of the positioning base plate cavity for fixing the calibrated product; four screw holes are opened at the bottom of the lower end of the positioning base plate cavity for fixing with the positioning base 6; holes are opened on both sides of the lower end of the product-carrying movable and adjustable plate 2 for fixing with the positioning base plate 4; limit blocks 1 are provided on both sides of the step surface at the upper end of the product-carrying movable and adjustable positioning plate 2 for fixing the product so that the product placed on the product-carrying movable and adjustable plate cannot move forward, backward, left, right, up or down; 4 screw holes are opened at both ends of the positioning base for fixing with the four-track aluminum profile 10 and the positioning base 6. The positioning base 6 can be moved left and right on the four-track aluminum profile 10, and the positioning base 6 can be fixed to any position on the aluminum profile 10 using screws; 4 screw holes are opened in the middle of the positioning base for fixing with the positioning base plate 4.

[0031] As attached Figure 2As shown, a single-track aluminum profile 8 is cut according to the dimensions of chart 7 to secure it. A reasonable tolerance is reserved for the vertical aluminum profile to ensure that chart 7 can be flexibly adjusted vertically within the single-track aluminum profile 8. According to the camera calibration test distance requirements, a dual-track aluminum profile 11 is precisely cut. The chart mounting structure and the positioning base 6 mounting structure are installed on the two aluminum profiles 11. The four-track aluminum profile 10 can be moved back and forth on the upper track aluminum profile 11 to adjust the required camera calibration distance.

[0032] As attached Figure 3 As shown, according to the size of the aluminum profile frame of the fixture after installation ( Figure 2 1. Cut the shading plate 9 as shown in the figure. A total of 5 pieces need to be cut, of which 4 identical shading plates are used for shading the top, bottom, left and right sides. A square shading plate is installed on the outside of the chart to block the light. The function of the shading plate is to isolate the influence of ambient light on the calibration results. Install 2 lighting lamps 15 on the inner side of the upper shading plate to provide a stable light source for camera calibration. Cut the aluminum profile 14 according to the length of the lower shading plate. The aluminum profile 14 is used to support the overall fixture. Example

[0033] Screw tightening requirements: Tighten the screws gradually in a diagonal or symmetrical order to ensure the stability of the entire assembly structure.

[0034] 1. Align the screw hole of the limit block 1 with the screw hole of the product-carrying movable and adjustable positioning plate 2, take out 4 M2 screws, and use hexagonal sockets to screw the screws into the corresponding screw holes 3 one by one to complete the installation of the limit block 1; align the opening of the product-carrying movable and adjustable positioning plate 2 with the screw hole of the positioning base plate 4, take out 2 M4 screws, and use hexagonal sockets to screw the screws into the corresponding screw holes 3 one by one to complete the installation of the product-carrying movable and adjustable positioning plate 2; align the screw holes of the positioning base plate 4 with the screw holes of the positioning base 6, take out 4 M4 screws, and use hexagonal sockets to screw the screws into the corresponding screw holes 3 one by one to complete the installation of the positioning base 4; align the screw holes of the positioning base 6 with the four-track aluminum profile 10, take out 4 M4 screws, and use hexagonal sockets to pre-screw the screws into the corresponding screw holes 3 one by one, adjust the positioning base 6 to the calibration requirement position and tighten the screws to complete the installation of the positioning base 6.

[0035] 2. Align and assemble the cut single-track aluminum profile 8, take out the first aluminum profile fixing connection block 12 and four M2 screws, and use hexagon sockets to screw the screws into the corresponding screw holes one by one. Then install chart 7 on the single-track aluminum profile bracket along the inner track of the single-track aluminum profile 8 on both sides to complete the installation of the chart. Assemble the single-track aluminum profile bracket with chart 7 and the cut double-track aluminum profile 11, take out the first aluminum profile fixing connection block 12 and four M2 screws, and use hexagon sockets to screw the screws into the corresponding screw holes one by one to complete the installation of the positioning mechanism of the chart. Assemble the four-track aluminum profile 10 with the positioning base 6 and the double-track aluminum profile 11, take out the second aluminum profile fixing connection block 13 and four M2 screws, and use hexagon sockets to pre-screw the screws into the corresponding screw holes one by one, adjust the four-track aluminum profile 10 to the required calibration position and tighten the screws to complete the installation of the positioning mechanism of the positioning base 6.

[0036] 3. Assemble the cut lower shading plate 9 with the assembled aluminum profile frame using woodworking latex. After the assembly is in place, take out the second aluminum profile fixing connection block 13 and four flat-head cross M4x12 screws, and use a cross screwdriver to screw the screws into the shading plate 9 one by one to complete the installation of the lower shading plate 9; use the right-angle connection block and flat-head cross M4x12 screws to fix the remaining four shading plates in the same way. Figure 3 Carry out the installation and complete the installation of the overall fixture shading plate 9; install the light lamp 15 on both sides of the upper shading plate 9, take out 4 flat-head cross M3x12 screws to fix the light lamp, and complete the installation of the light lamp 15; install the cut aluminum profile 14 on both sides of the bottom of the lower shading plate, take out 4 flat-head cross M4x12 screws to fix the aluminum profile 14, and complete the installation of the aluminum profile 14.

[0037] Step 1. Turn on the light inside the calibration fixture, put the product into the mold test mode, open the camera software, place the product on the load positioning plate, and confirm that the product is stable and not shaking;

[0038] Step 2. Click the optical zoom to take a photo in the first stage and the optical zoom to take a photo in the second stage respectively, and the product will be automatically tested;

[0039] Step 3: Wait for the calibration test to be completed, remove the product from the product positioning base, check the calibration results, OK the product to normal flow, NG the product to be picked out and placed in a unified manner and handed over to the foreman for processing.

[0040] If any abnormality is detected during use of the optical zoom calibration fixture, such as looseness or unusual noises, stop using it immediately and perform a comprehensive inspection and maintenance. Check for loose screws and damaged accessories, and promptly repair or replace components to ensure normal and safe operation.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An optical zoom calibration fixture, characterized in that include: Fixture outline, light, fixture bracket and fixture body; The outer contour of the fixture is a light shield, which is used to install a light and isolate the influence of ambient light on the calibration results; The illumination lamp is used to provide a stable light source for calibration; The fixture bracket is a fixture aluminum profile frame used to fix the fixture body; The front end of the fixture body is a fixed product base for fixing the calibrated product; The rear end of the fixture body serves as a chart positioning mechanism for fixing the chart, which is used to calibrate the product.

2. The optical zoom calibration fixture according to claim 1, characterized in that The fixed product base is provided with a positioning base and a positioning base plate; the positioning base is provided with a positioning base screw hole for fixing the positioning base plate and the aluminum profile; the positioning base plate is provided with a cavity, and a plurality of screw holes are provided in the cavity. The cavity is used to place the product-carrying movable adjustable positioning plate for contacting the calibrated product.

3. The optical zoom calibration fixture according to claim 2, characterized in that The product-carrying movable adjustment plate has openings on both sides of the lower end for adjusting the product positioning height; the product-carrying movable adjustment plate has limit blocks on both sides of the step surface on the upper end, which are used to fix the product so that the product placed on the product-carrying movable adjustment plate cannot move forward, backward, left, right, up, or down.

4. The optical zoom calibration fixture according to claim 1, characterized in that The chart positioning mechanism is provided with a single-track aluminum profile and an aluminum profile fixed connection block for fixing the chart so that the chart can be adjusted up and down on the positioning mechanism.

5. The optical zoom calibration fixture according to claim 4, characterized in that: The side length of each grid of the chart is 36±0.1mm, the size of the entire chart is 432mm×288mm, and there are blank spaces symmetrically around the chart, of which the upper and lower blank widths are 46±0.5mm, and the left and right blank widths are 34±0.5mm. The size of the entire chart is 500mm×380mm.

6. The optical zoom calibration fixture according to claim 1, characterized in that: The lighting uses a D65 light source with a color temperature of 6500K.

7. The optical zoom calibration fixture according to claim 6, characterized in that: The illumination intensity is between 400 Lux and 800 Lux. The brightness of the collected image has an average grayscale value of 40 ± 5, and the average grayscale value of the white block is 0 ± 5.

8. The optical zoom calibration fixture according to claim 1, characterized in that: The distance between the positioning base and the chart positioning mechanism is 40±1 cm.

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