Visible light zoom camera

Abstract

The application relates to a visible light zoom camera, which comprises a bottom plate, a fixed support is arranged at the top of the bottom plate, a lens main body is mounted on the fixed support, a zoom cam is mounted on the outer side of the lens main body, a mirror group five, a mirror group four, a mirror group three, a mirror group two and a mirror group one are sequentially arranged on the inner side of the lens main body, a zoom cam pressing ring is arranged at one end of the zoom cam, a filter assembly is arranged at one end of the zoom cam at the end of the zoom cam pressing ring, and a detection plate assembly is mounted on the outer side of the filter assembly. The application has the beneficial effect that through the assembly and cooperation of various structures, stable work can be realized under extreme environments, the high reliability requirements of special fields such as military and security can be met, the equipment weight is obviously reduced through light weight design and modular structure, the assembly and maintenance process is simplified, and the long-term stability of imaging quality is ensured.

Description

Technical Field

[0001] This application relates to the field of zoom camera technology, and more particularly to visible light zoom cameras. Background Technology

[0002] The principle behind visible light zoom cameras is a highly integrated technological system that combines technological achievements from multiple fields such as optics, electronics, and computer vision. Through the synergistic effect of optical zoom, image sensor technology, image stabilization and optimization, and intelligent integration and control, visible light zoom cameras can provide high-quality and stable image capture capabilities, meeting the visual capture needs of various complex scenarios. The core of a visible light zoom camera lies in its optical zoom capability, which mainly relies on a precise lens design. A lens typically consists of multiple lenses, each with its specific function and role. By changing the relative positions of the lenses, the path of light can be adjusted, thereby changing the focal length. This design allows the camera to achieve clear imaging of both distant and close-range targets without changing the lens.

[0003] Patent application number 202011376983.0 discloses an 8K ultra-high-definition zoom visible light television camera lens. This lens features a large focal length, large aperture, and low distortion, enabling it to match 8K (40-megapixel) ultra-high-definition cameras. Furthermore, the lens uses a rear fixed-group focusing mechanism with a front fixed-group, achieving heat-free operation and meeting the requirements of matching 8K (40-megapixel) ultra-high-definition cameras within a full temperature range of -45°C to +65°C. In conjunction with this application and comparing it with existing zoom cameras, with the rapid development of optical imaging technology, visible light zoom cameras have been widely used in military, security, and industrial fields. These devices need to maintain stable imaging performance under complex environmental conditions, thus placing extremely high demands on structural design. Currently, visible light zoom cameras on the market are prone to performance degradation or failure under extreme environments such as high temperature, low temperature, and vibration, seriously affecting the reliability and lifespan of the equipment. In addition, existing equipment still has significant room for improvement in terms of lightweight and modular design, making it difficult to meet the demands of modern applications for portability and rapid assembly. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the main purpose of this application is to provide a visible light zoom camera.

[0005] The technical solution of this application is as follows: a visible light zoom camera includes a base plate, a fixed support is provided on the top of the base plate, a lens body is mounted on the fixed support, a zoom cam is sleeved on the outer side of the lens body, and lens groups five, four, three, two and one are sequentially arranged on the inner side of the lens body. A zoom cam retaining ring is provided at one end of the zoom cam, a filter assembly is provided at one end of the zoom cam located at the end of the zoom cam retaining ring, and a detector plate assembly is mounted on the outer side of the filter assembly. A focusing cam is installed at the edge of the other end of the zoom cam, and a focusing cam retaining ring is provided at the other end of the focusing cam located on the lens body. An integrated guide cylinder is also provided at the other end of the lens body, and a zoom lens is installed inside the guide cylinder. A control plate assembly is provided on the fixed support directly above the zoom cam.

[0006] In a preferred embodiment, the outer surface of the lens body is also provided with zoom group guide pins and compensation group guide pins. When the zoom cam rotates and adjusts on the outside of the lens body, it is guided and limited by the zoom group guide pins and compensation group guide pins. At the same time, a focus group guide pin is also provided at the other edge of the lens body. When the focus cam rotates, it is also guided and limited by the focus group guide pin.

[0007] By adopting the above technical solution, we can ensure stable adjustment while better controlling the adjustment accuracy.

[0008] In a preferred embodiment, a focusing motor assembly is mounted on the top of the fixed support at the other end. A filter switching motor assembly is mounted on the top end of the fixed support directly in front of the zoom cam and on the filter assembly. A focusing potentiometer assembly is provided at one end of the focusing motor assembly, and the focusing potentiometer assembly is aligned and connected to the filter switching motor assembly. A zoom motor assembly is mounted on the bottom rear of the zoom cam on the base plate, and one end of the zoom motor assembly meshes with the focusing cam via a gear.

[0009] In a preferred embodiment, the lens assembly includes a main lens barrel for fixed installation. Lens frames are equidistantly arranged on the inner side of the main lens barrel, and spacers are provided between adjacent lens frames. Lenses are also installed on the inner side of the lens frames. Lens retaining rings for fixing are provided at the edges of the lenses within the lens frames, and lens retaining rings for overall fixing are also provided at the inner edge of the main lens barrel.

[0010] By adopting the above technical solution, the stability of the lens assembly is ensured, while making adjustments convenient and avoiding lens shaking during the adjustment process.

[0011] In a preferred embodiment, the filter assembly includes a lens mount, a rotating shaft is provided on the inner side of the lens mount, a synchronously rotating filter gear is mounted on the rotating shaft and located on the inner side of the lens mount, a filter is provided on the filter gear, a limit block two is provided on one side of the inner surface of the lens mount, and a limit block one is provided on one side of the filter gear. When the filter gear rotates and adjusts inside the lens mount via the rotating shaft, it is limited by the limit block one and the limit block two.

[0012] By adopting the above technical solutions, the use of filters can be better adjusted, and different filtering requirements can be met under different usage conditions.

[0013] In a preferred embodiment, the detector plate assembly includes a fixing base for fixing, a rear cover fixedly mounted on the outer side of the fixing base, an adjusting shim provided between the fixing base and the rear cover, a detector plate adjusting seat installed inside the fixing base, a sealing ring I provided between the fixing base and the detector plate adjusting seat, a detector plate adapter seat installed on the inner side of the detector plate adjusting seat, a detector plate installed on the inner side of the detector plate adapter seat, and a sealing ring II provided on one edge of the fixing surface of the fixing base.

[0014] By adopting the above technical solutions, sealing performance can be guaranteed while improving detection capabilities.

[0015] In a preferred embodiment, a flexible flat cable is connected to the top of the detection plate, and the other end of the flexible flat cable is connected to a control board assembly. The control board assembly includes a main control board for fixing, and the other end of the flexible flat cable is connected to the main control board. A heat sink is installed on the top of the main control board, and a nylon partition is provided at the corner between the main control board and the heat sink. A fixing plate is installed at the bottom of the main control board, and a motor control board is provided at the bottom of the fixing plate through a nylon partition with a communicating structure.

[0016] By adopting the above technical solution, the installation is stable and heat dissipation is guaranteed, resulting in better operation and use.

[0017] Compared with the prior art, the advantages and positive effects of this application are as follows: In this application, a traditional cam-based zoom structure is adopted. The motor drives the cam to rotate via gears, and the cam moves the lens assembly via guide pins to achieve zooming and focusing. Similarly, the motor and gear transmission are used to achieve the filter switching function. The two ends of the zoom cam and focusing cam curve grooves are used as mechanical limits. Mechanical limit blocks are installed on the filter assembly. The mechanical limits are used to achieve motor power-on self-test. The motor is equipped with an encoder. Changing the encoder value controls the amount of motor rotation. The focusing cam drives the potentiometer to rotate via gears. The potentiometer signal is transmitted to the main control board. The main control board calculates the focusing amount based on the potentiometer feedback value, thereby controlling the amount of motor rotation to achieve precise closed-loop control of the motor and ensure focusing accuracy.

[0018] In this application, through the assembly and cooperation of various structures, it can work stably in extreme environments, meet the high reliability requirements of special fields such as military and security, and significantly reduce the weight of the equipment through lightweight design and modular structure, simplify the assembly and maintenance process, and ensure long-term stability of imaging quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this application; Figure 2 This is a schematic diagram of the main structure of this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the lens body of this application; Figure 4 This is a schematic diagram of the structure of this application; Figure 5 This is a schematic diagram of the structure of lens assembly one of this application; Figure 6 This is a schematic diagram of the internal perspective structure of the filter assembly of this application; Figure 7 This is a schematic diagram of the detector plate assembly of this application; Figure 8 This is a schematic diagram of the cross-sectional structure of the detector plate assembly of this application; Figure 9 This is a schematic diagram of the top structure of the control board assembly of this application; Figure 10 This is a schematic diagram of the bottom structure of the control board assembly of this application.

[0020] Legend: 100. Base plate; 101. Fixed support; 102. Lens body; 103. Focusing potentiometer assembly; 104. Focusing cam; 105. Focusing cam retaining ring; 106. Guide tube; 200. Zoom lens; 201. Zoom cam; 202. Zoom group guide pin; 203. Compensation group guide pin; 204. Zoom cam retaining ring; 205. Lens group five; 206. Lens group four; 207. Lens group three; 208. Lens group two; 209. Lens group one; 291. Lens element; 292. Lens frame; 293. Lens element retaining ring; 294. Spacer ring; 295. Lens frame retaining ring; 296. Main lens barrel; 210. Focusing group guide pin; 300. Filter switching motor Components; 400, Filter assembly; 401, Lens mount; 402, Rotating shaft; 403, Filter gear; 404, Filter; 405, Limiting block one; 406, Limiting block two; 500, Focusing motor assembly; 600, Detector plate assembly; 601, Mounting base; 602, Adjusting shim; 603, Rear cover; 604, Sealing ring one; 605, Detector plate; 606, Detector plate adapter; 607, Detector plate adjusting base; 608, Sealing ring two; 609, Flexible ribbon cable; 700, Zoom motor assembly; 800, Control board assembly; 801, Main control board; 802, Mounting plate; 803, Heat sink; 804, Nylon spacer; 805, Motor control board. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] Reference Figure 1-10A visible light zoom camera includes a base plate 100. A fixed support 101 is provided on the top of the base plate 100. A lens body 102 is mounted on the fixed support 101. A zoom cam 201 is sleeved on the outer side of the lens body 102. Lens groups 5 205, 4 206, 3 207, 2 208, and 1 209 are arranged sequentially on the inner side of the lens body 102. A zoom cam retaining ring 204 is provided at one end of the zoom cam 201, and one end of the zoom cam 201 is located at the zoom cam retaining ring 204. One end of the lens body 102 is provided with a filter assembly 400, and a detector plate assembly 600 is installed on the outside of the filter assembly 400. A focusing cam 104 is installed at the edge of the other end of the zoom cam 201. A focusing cam retainer 105 is provided on the other end of the focusing cam 104 on the lens body 102. An integrated guide tube 106 is also provided on the other end of the lens body 102. The zoom lens 200 is installed inside the guide tube 106. A control plate assembly 800 is provided on the fixed support 101 directly above the zoom cam 201.

[0023] Specifically, the outer surface of the lens body 102 is also provided with zoom group guide pin 202 and compensation group guide pin 203. When the zoom cam 201 rotates and adjusts on the outside of the lens body 102, it is limited by the zoom group guide pin 202 and compensation group guide pin 203. At the same time, a focus group guide pin 210 is also provided at the other edge of the lens body 102. When the focus cam 104 rotates, it is also guided and limited by the focus group guide pin 210.

[0024] Specifically, a focusing motor assembly 500 is installed on the top of the fixed support 101 at the other end. A filter switching motor assembly 300 is installed on the top end of the fixed support 101, which is located directly in front of the zoom cam 201 and on the filter assembly 400. A focusing potentiometer assembly 103 is provided at one end of the focusing motor assembly 500, and the focusing potentiometer assembly 103 is aligned and connected with the filter switching motor assembly 300. A zoom motor assembly 700 is installed on the bottom rear of the zoom cam 201 on the base plate 100. One end of the zoom motor assembly 700 meshes with the focusing cam 104 through a gear.

[0025] Specifically, lens assembly 209 includes a main lens barrel 296 for fixed installation. Lens frames 292 are equidistantly arranged on the inner side of the main lens barrel 296, and spacers 294 are provided between adjacent lens frames 292. Lenses 291 are also installed on the inner side of the lens frames 292. Lens retaining rings 293 for fixing are provided at the edge of the lens 291 and inside the lens frames 292. Lens retaining rings 295 for overall fixing are also provided at the inner edge of the main lens barrel 296. Five lens assemblies are installed in the guide tube 106. Lens assembly 1 209 and lens assembly 3 207 are fixed lens assemblies, lens assembly 2 208 is a compensating lens assembly, lens assembly 4 206 is a zoom lens assembly, and lens assembly 5 205 is a focusing lens assembly. The focusing cam 104 and the zoom cam 201 are fixed to the guide tube 106 with threaded retaining rings. Precision steel balls with a diameter of 1mm are installed at both ends of the cams to ensure smooth rotation of the cams.

[0026] Specifically, the guide cylinder 106 has a guide groove parallel to the optical axis, the cam has a curved guide groove, and two guide pins are installed on each of the zoom group, compensation group and focusing group. The guide pins slide simultaneously in the guide grooves of the guide cylinder and the cam. When the focusing cam 104 rotates, it drives the zoom group guide pin 202 and the compensation group guide pin 203 to move simultaneously along the optical axis to achieve continuous zoom. When the focusing cam 104 rotates, it drives the focusing group guide pin 210 to move along the optical axis to achieve focusing.

[0027] Specifically, to meet the requirements for optical axis consistency, the coaxiality error of lenses within a lens group must be within 0.01mm, the interval error within 0.02mm, the coaxiality error between lens groups must be within 0.02mm, and the interval error between lens groups must be within 0.02mm.

[0028] Reference Figure 1-10The filter assembly 400 includes a lens mount 401. A rotating shaft 402 is located inside the lens mount 401. A synchronously rotating filter gear 403 is mounted on the rotating shaft 402 and located inside the lens mount 401. A filter 404 is mounted on the filter gear 403. A second limit block 406 is provided on one side of the inner surface of the lens mount 401, and a first limit block 405 is provided on one side of the filter gear 403. When the filter gear 403 rotates and adjusts inside the lens mount 401 via the rotating shaft 402, it is limited by the first limit block 405 and the second limit block 406. To achieve a miniaturized design, the motor size must be as small as possible. Therefore, a coreless motor with a reduction gearbox is selected as the drive component. Based on the requirement that the field of view change time be less than 8 seconds, the zoom cam 20 is calculated according to the zoom cam curve winding angle. The rotational speed of focusing cam 104 is calculated by setting the focusing time to 1s and the winding angle of the focusing cam curve. Then, the rotational speeds of zoom motor assembly 700 and focusing motor assembly 500 are calculated by combining the gear transmission ratio. The rotational speed of filter switching motor assembly 300 is calculated by setting the filter switching time to 1s and the rotation angle range, and then combining the gear transmission ratio. The moving speed of each moving lens assembly is calculated by using the cam rotational speed and the cam curve pressure angle. The torque of the drive assembly is calculated by combining the mass of the moving lens assembly, the mass of the cam, the friction coefficient between structural components, the transmission efficiency, and other factors. Finally, the output torque of the motor reduction gearbox assembly is required to be greater than 80mN.m and the rotational speed greater than 20r / min. Based on the rotational speed and torque, a suitable drive assembly is selected. The drive assembly selected is a brushed hollow cup planetary gear motor from Shenzhen Five Star Motor Co., Ltd.

[0029] Specifically, the detector plate assembly 600 includes a fixing base 601 for fixing, a rear cover 603 fixedly mounted on the outer side of the fixing base 601, an adjusting shim 602 provided between the fixing base 601 and the rear cover 603, a detector plate adjusting base 607 installed inside the fixing base 601, a sealing ring 604 provided between the fixing base 601 and the detector plate adjusting base 607, a detector plate adapter 606 installed on the inner side of the detector plate adjusting base 607, a detector plate 605 installed on the inner side of the detector plate adapter 606, and a second sealing ring 608 provided on one edge of the fixing surface of the fixing base 601. 605 is fixed to the detector board adapter 606 with four screws. The detector board adapter 606 is fixed to the detector board adjustment seat 607 with four screws. The detector board adjustment seat 607 is fixed to the fixed seat 601 with four screws. There is an adjustment shim 602 between the detector board adjustment seat 607 and the fixed seat 601. By replacing the adjustment shim 602 with different thicknesses, the optical axis position of the detector board can be adjusted to make the image clear. The adjustment shim 602 can be replaced simply by loosening the four fixing screws. There is no need to remove the entire detector board. The operation is convenient. After adjustment, the back cover 603 is fixed to the detector board adjustment seat 607 with four screws to protect the circuit board.

[0030] Specifically, a flexible flat cable 609 is connected to the top of the detection board 605. The other end of the flexible flat cable 609 is connected to the control board assembly 800. The control board assembly 800 includes a main control board 801 for fixing. The other end of the flexible flat cable 609 is connected to the main control board 801. A heat sink 803 is installed on the top of the main control board 801. A nylon spacer 804 is provided at the corner between the main control board 801 and the heat sink 803. A fixing plate 802 is installed at the bottom of the main control board 801. The bottom of the fixing plate 802 is connected by a nylon spacer with a communicating structure. The duct 804 is equipped with a motor control board 805. The main control board 801 has a heating element, and a heat sink 803 is installed on top of it. A heat sink with a high thermal conductivity silicone pad is attached between the heat sink and the heating element. The heat sink 803 and the main control board 801 are fixed together to the fixing plate 802. The motor control board 805 is fixed to the back of the fixing plate 802. The main control board 801 and the heat sink 803, the main control board 801 and the fixing plate 802, and the motor control board 805 and the fixing plate 802 are insulated with nylon duct 804.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A visible light zoom camera, comprising a base plate (100), wherein a fixed support (101) is provided on the top of the base plate (100), and a lens body (102) is mounted on the fixed support (101), characterized in that: A zoom cam (201) is fitted onto the outer side of the lens body (102). Lens group five (205), lens group four (206), lens group three (207), lens group two (208), and lens group one (209) are sequentially arranged on the inner side of the lens body (102). A zoom cam retainer (204) is provided at one end of the zoom cam (201). A filter assembly (400) is provided at one end of the zoom cam (201) located at one end of the zoom cam retainer (204). The filter assembly (400) is located on the outer side of... A detection plate assembly (600) is installed, and a focusing cam (104) is installed at the other edge of the zoom cam (201). A focusing cam pressure ring (105) is provided on the other end of the focusing cam (104) on the lens body (102). An integrated guide cylinder (106) is also provided on the other end of the lens body (102). A zoom lens (200) is installed inside the guide cylinder (106). A control plate assembly (800) is provided on the fixed support (101) directly above the zoom cam (201).

2. The visible light zoom camera according to claim 1, characterized in that: The outer surface of the lens body (102) is also provided with zoom group guide pins (202) and compensation group guide pins (203). When the zoom cam (201) rotates and adjusts on the outside of the lens body (102), it is limited by the zoom group guide pins (202) and compensation group guide pins (203). At the same time, a focus group guide pin (210) is also provided at the other edge of the lens body (102). When the focus cam (104) rotates, it is also guided and limited by the focus group guide pins (210).

3. The visible light zoom camera according to claim 1, characterized in that: A focusing motor assembly (500) is installed on the top of the fixed support (101) at the other end. A filter switching motor assembly (300) is installed on the top end of the fixed support (101) directly in front of the zoom cam (201) and on the filter assembly (400). A focusing potentiometer assembly (103) is provided at one end of the focusing motor assembly (500), and the focusing potentiometer assembly (103) is aligned and connected with the filter switching motor assembly (300). A zoom motor assembly (700) is installed on the bottom of the base plate (100) directly behind the zoom cam (201). One end of the zoom motor assembly (700) meshes with the focusing cam (104) through a gear.

4. The visible light zoom camera according to claim 1, characterized in that: The first lens assembly (209) includes a main lens barrel (296) for fixed installation. A lens frame (292) is provided at equal intervals on the inner side of the main lens barrel (296), and a spacer (294) is provided between adjacent lens frames (292). A lens (291) is also installed on the inner side of the lens frame (292). A lens retainer (293) for fixing is provided at the edge of the lens (291) inside the lens frame (292), and a lens retainer (295) for overall fixing is also provided at the inner edge of the main lens barrel (296).

5. The visible light zoom camera according to claim 1, characterized in that: The filter assembly (400) includes a lens mount (401), a rotating shaft (402) is provided on the inner side of the lens mount (401), a synchronously rotating filter gear (403) is installed on the rotating shaft (402) and located on the inner side of the lens mount (401), a filter (404) is provided on the filter gear (403), a second limit block (406) is provided on one side of the inner surface of the lens mount (401), and a first limit block (405) is provided on one side of the filter gear (403). When the filter gear (403) rotates and adjusts inside the lens mount (401) via the rotating shaft (402), it is limited by the first limit block (405) and the second limit block (406).

6. The visible light zoom camera according to claim 1, characterized in that: The detector plate assembly (600) includes a fixing seat (601) for fixing, a rear cover (603) is fixedly installed on the outside of the fixing seat (601), an adjusting shim (602) is provided between the fixing seat (601) and the rear cover (603), a detector plate adjusting seat (607) is installed inside the fixing seat (601), a sealing ring (604) is provided between the fixing seat (601) and the detector plate adjusting seat (607), a detector plate adapter seat (606) is installed on the inside of the detector plate adjusting seat (607), a detector plate (605) is installed on the inside of the detector plate adapter seat (606), and a sealing ring (608) is also provided on one side edge of the fixing surface of the fixing seat (601).

7. The visible light zoom camera according to claim 6, characterized in that: The top of the detection board (605) is provided with a flexible flat cable (609), and the other end of the flexible flat cable (609) is connected to the control board assembly (800). The control board assembly (800) includes a main control board (801) for fixing. The other end of the flexible flat cable (609) is connected to the main control board (801). A heat sink (803) is installed on the top of the main control board (801). A nylon partition (804) is provided at the corner between the main control board (801) and the heat sink (803). A fixing plate (802) is installed on the bottom of the main control board (801). A motor control board (805) is provided on the bottom of the fixing plate (802) through the nylon partition (804) with a communicating structure.

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