Camera lens shaft shifting device

Abstract

The invention belongs to the technical field of photographic equipment, and relates to a camera lens tilt shift device. The device comprises a lens connecting unit, a base connecting unit and a top fixing unit, wherein the lens connecting unit comprises a lens rotating mechanism, a packaging shell and a lens interface; the packaging shell comprises a lens rotating mechanism base and a lens fixing seat support; the end face, close to the base connecting unit, of the lens fixing base support is an arc face. The lens rotating mechanism is mounted in the lens rotating mechanism base, the base connecting unit is mounted on the inner side of the arc surface of the lens fixing seat support, and the lens interface is mounted on the outer side of the arc surface of the lens fixing seat support; and the top fixing unit is mounted at the top of the lens fixing seat supporting and base connecting unit. The device is simple in structure, convenient to use and capable of accurately controlling the tilt-shift angle.

Description

Technical Field

[0001] The invention belongs to the technical field of photographic equipment and relates to a camera lens axis shifting device. Background Art

[0002] Depth of field refers to the range of distances in front and behind the object that can be measured to obtain a clear image at the front of the camera lens or other imager. Improving the depth of field plays an important role in enhancing the clarity of the image, especially when imaging irregularly shaped objects or objects that are not in the same plane. The large depth of field imaging technology has broad application prospects in the fields of microelectronics manufacturing, medical imaging measurement, and online industrial monitoring.

[0003] According to the Scheimpflug tilt imaging principle, by adjusting the inclination angle between the objective lens or lens and the imaging plane, the imaging lens and the imaging plane are tilted, and the depth of field of the imaging can be increased. In this regard, leading manufacturers such as Canon and Nikon all have their own tilt-shift lens products. However, the existing tilt-shift lens products are mainly aimed at conventional photography, and the lens shift performance cannot fully meet the needs of industrial imaging; at the same time, the existing tilt-shift lens products can usually only be adapted to camera bodies with specific interfaces, and the versatility is poor; in addition, the cost of using the existing tilt-shift lenses is high. In view of the limitations of the tilt-shift lens, splitting and transferring the camera lens and the body is another solution to achieve tilt-shift imaging. At present, there are a small number of tilt-shift adapter ring products on the market, but they are still mainly aimed at conventional photography, and it is difficult to meet the needs of industrial applications in terms of shift performance and adaptability. Summary of the invention

[0004] In view of the limitations of existing shift lenses or camera lens shift devices, the present invention provides a camera lens shift device that can accurately control the shift angle and is convenient and universal. It has a compact structure, is easy to use, and has good versatility for cameras of different sizes.

[0005] The present invention provides a camera lens shift device, comprising a lens connecting unit, a base connecting unit and a top fixing unit; wherein the lens connecting unit comprises a lens rotating mechanism, a packaging shell and a lens interface; the packaging shell comprises a lens rotating mechanism base and a lens fixing seat support; the end surface of the lens fixing seat support close to the base connecting unit is an arc surface; the lens rotating mechanism is installed inside the lens rotating mechanism base, the base connecting unit is installed on the inner side of the arc surface of the lens fixing seat support, and the lens interface is installed on the outer side of the arc surface of the lens fixing seat support; the top fixing unit is installed on the top of the lens fixing seat support and the base connecting unit.

[0006] Preferably, the lens rotation mechanism comprises a rotating shaft, a connecting rod, a turntable, a vertical sliding rod, a sliding rod connector, a rotating rod, a lens connector and a connecting frame; one end of the rotating shaft is connected to the lens rotation driver, and the other end is connected to the turntable, and the rotating shaft and the turntable are concentric; one end of the connecting rod passes through the turntable, and the other end is sleeved on the vertical sliding rod; the top and bottom of the vertical sliding rod are respectively connected to the sliding rod connector, and the two sliding rod connectors are respectively connected to the rotating rod, and the rotating rod passes through the rear end of the connecting frame; the connections between the connecting rod and the turntable, the connecting rod and the vertical sliding rod, and the rotating rod and the connecting frame are all movable connections.

[0007] Preferably, the lens rotation driver adopts a manual knob with a scale or a stepping motor.

[0008] Preferably, the base connection unit includes a base size adjustment mechanism; the base size adjustment mechanism includes a guide rail, a slider, a base adjustment shaft, a sector block, a four-corner turntable, and an arc buckle. One end of the base adjustment shaft is connected to the base adjustment driver, and the other end is connected to the four-corner turntable after passing through the guide rail; a groove is provided at the bottom of the slider to cooperate with the guide rail; the sector block is connected to the slider through a fixed column at the top of the slider; one end of the arc buckle is connected to the sector, and the other end is connected to the four-corner turntable; the arc buckle and the sector block, the arc buckle and the four-corner turntable, the base adjustment shaft and the guide rail are all movably connected.

[0009] Preferably, the base connection unit further comprises a base connection back plate; the base connection back plate is provided with a through-type slideway, and when the sector block slides, the fixing column of the sector block can slide along the slideway.

[0010] Preferably, the back plate of the base adopts a hollow design to facilitate the connection of the camera base cable.

[0011] Preferably, a right-angle frame is also provided on the fixing column of the sector block for fixing the camera mount.

[0012] Preferably, the base connection unit further includes an external packaging shell, and the end surface of the shell close to the lens connection unit is an arc surface.

[0013] Preferably, the outer edge of the lens rotation mechanism base is provided with bolt holes for connecting external equipment.

[0014] The device of the present invention has a simple structure, is easy to use, and can accurately control the axis shift angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly of the camera lens shift device in an embodiment of the present invention; Figure 2 is an exploded view of a camera lens shift device according to an embodiment of the present invention; Figure 3 is a schematic diagram of a lens connection unit; Figure 4 Schematic diagram of lens rotation mechanism; Figure 5 It is a schematic diagram of the base connection unit; Figure 6 This is the exploded view of the machine base size adjustment mechanism; Figure 7 The schematic diagram of the working of the machine base size adjustment mechanism; (a) before rotation; (b) after rotation; Figure 8 Schematic diagram of the rotation of the camera lens shift device in an embodiment of the present invention; wherein (a) rotates to the left; (b) rotates to the right; Fig. 9 FIG. 1 is a process diagram of a camera being installed by a lens shift device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is obviously capable of being implemented in a variety of other ways different from the description herein. For those skilled in the art, any substitution, improvement or change made to the embodiments of the present invention is within the protection scope of the present invention, and the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0017] like Figure 1 and Figure 2 As shown, the present invention provides a camera lens shift device, which includes a lens connection unit 10, a base connection unit 20 and a top fixing unit 30. The lens connection unit 10 includes a lens rotation mechanism 100, a packaging shell 101 of the lens rotation mechanism and a lens interface 102. The base connection unit 20 includes a base connection back plate 201, a base size adjustment mechanism 202 and an external packaging shell 203 thereof.

[0018] like Figure 3 As shown, the core part of the lens connection unit 10 is the lens rotation mechanism 100, which adjusts the lens rotation angle by means of power transmission, thereby achieving the effect of camera lens shifting. Figure 4As shown, in terms of specific structure, the lens rotation mechanism 100 includes a rotating shaft 103, a connecting rod 104, a rotating disk 105, a vertical sliding rod 106, a sliding rod connector 107, a rotating rod 108, a lens connector 109 and a connecting frame 110. In terms of mechanical connection, one end of the rotating shaft 103 is connected to the lens rotation driver 111, and the other end is connected to the rotating disk 105, and the rotating shaft 103 is concentric with the rotating disk 105. One end of the connecting rod 104 passes through the rotating disk 105, and the other end is covered with the vertical sliding rod 106. The top and bottom of the vertical sliding rod 106 are respectively connected to the sliding rod connector 107, and the two sliding rod connectors 107 are respectively connected to the rotating rod 108. Among them, the connection between the connecting rod 104 and the rotating disk 105, the connection between the connecting rod 104 and the vertical sliding rod 106, and the rotating rod 108 and the connecting frame 110 are all active connections.

[0019] When adjusting the rotation of the camera lens, the rotating shaft 103 drives the turntable 105 to rotate clockwise or counterclockwise, and the turntable 105 transmits power to the rotating rod 108 through the connecting rod 104, the vertical slide bar 106 and the slide bar connector 107 in turn, and the rotating rod 108 drives the camera lens to rotate through the lens connector 109. When the turntable 105 rotates, as the rotation angle of the turntable changes, the end of the connecting rod 104 connected to the vertical slide bar will slide up and down along the vertical slide bar 106. The lens rotation driver 111 can use a manual knob with a scale. If more precise and convenient control is required, a stepper motor drive can be selected. Figure 7 As shown in (a) and (b), the initial position of the lens rotation mechanism 100 is the neutral position, and the camera lens can be adjusted to rotate to the left or right by rotating clockwise or counterclockwise. In this embodiment, the adjustment range of the camera lens is -45°~45°. Compared with the traditional compound gear transmission method, the rotation mechanism adjusts the rotation angle by a power transmission method in which a small-diameter shaft drives a large-diameter disk, which can effectively achieve the effect of deceleration and realize precise control of the rotation angle. At the same time, the structure is simple and compact, which can effectively improve the operation reliability.

[0020] The encapsulation shell 101 of the lens rotation mechanism includes a lens rotation mechanism base 1011 and a lens fixing seat support 1012. The outer edge of the lens rotation mechanism base 1011 is provided with bolt holes for easy fixation with an optical platform, an optical plate, etc. The lens interface 102 of the lens connection unit 10 is used to connect with a camera lens, and can be flexibly replaced with a screw interface (such as a C interface) or a bayonet interface (such as an F interface) according to different lenses. Figure 8 Since the lens connecting unit 10 needs to rotate, the end surface of the lens fixing seat support 1012 close to the base connecting unit is an arc surface.

[0021] like Figure 5As shown, the core part of the base connection unit 20 is the base size adjustment mechanism 202. Since the tail end surface of the industrial camera base is usually square, the adaptation of camera bases of different sizes can be achieved by adjusting the fixed axis spacing of the base size adjustment mechanism. Figure 6 As shown, in terms of specific structure, the base size adjustment mechanism 202 includes a guide rail 204, a slider 205, a base adjustment shaft 206, a sector block 207, a four-corner turntable 208, an arc buckle 209, etc. In terms of mechanical connection, one end of the base adjustment shaft 206 is connected to the base adjustment driver 210, and the other end passes through the guide rail 204 and is connected to the four-corner turntable 208. A groove is provided at the bottom of the slider 205, and the slide is slidable with the guide rail 204. The sector block 207 is connected to the slider 205 through a fixed column 211 at the top of the slider 205. Driven by the slider 205, the sector block 207 can also slide linearly along the guide rail 204. One end of the arc buckle 209 is connected to the sector block 207, and the other end is connected to the four-corner turntable 208. Among them, the arc buckle 209 and the fan-shaped block 207, the arc buckle 209 and the four-corner rotating disk 208, the base adjustment shaft 206 and the guide rail 204 are all movably connected. Figure 6 In (a) and (b), when the camera base is installed, the base adjustment driver 210 drives the four-corner turntable 208 to rotate through the base adjustment shaft 206, and the four-corner turntable 208 drives the fan-shaped block 207 to slide linearly along the guide rail 204 through the arc buckle 209 to achieve the adjustment effect. In this embodiment, the number of the slider 205, the fan-shaped block 207 and the arc buckle 209 are all 4, and the base adjustment driver 210 is driven by a manual knob.

[0022] refer to Figure 5 The base connection unit 20 also includes a base connection back plate 201 and a base connection unit external packaging shell 203. Among them, the base connection back plate 201 is provided with a through-type slide 211, and when the fan-shaped block 207 slides, the fixing column 211 of the fan-shaped block 207 can slide along the slide. The base connection back plate 201 adopts a hollow design to facilitate the cable connection at the rear end face of the camera base. At the same time, a right-angle frame 212 is also provided on the fixing column 212 of the fan-shaped block 207 for fixing the camera base. Reference Figure 8 In order to cooperate with the rotation of the lens connecting unit 10, the end surface of the external packaging shell 203 of the base connecting unit close to the lens connecting unit is an arc surface.

[0023] In actual use, the process of installing the camera on the lens shift device is as follows: Fig. 9As shown in the figure: (1) the camera 40 is disassembled into a camera lens 401 and a camera base 402; (2) the camera lens shift device 1 is disassembled into three parts: a lens connection unit 10, a base connection unit 20 and a top fixing unit 30; (3) the camera lens 401 is fixed to the lens interface 102 of the lens connection unit 10; (4) the base adjustment driver 210 of the base connection unit 20 is adjusted to fix the camera base 402 to the base connection back plate 201 of the base connection unit 20, and the right-angle frame 213 of the fan-shaped block fixing column 212 clamps the four corners of the camera base 402; (5) the base connection unit 20 of the camera lens shift device 1 is combined with the lens connection unit 10, and the top fixing unit 30 is connected to the lens connection unit 10 by fixing bolts, and the installation is completed.

Claims

1. A camera lens shift device, characterized in that: It comprises a lens connection unit, a base connection unit and a top fixing unit; wherein the lens connection unit comprises a lens rotation mechanism, a packaging shell and a lens interface; the packaging shell comprises a lens rotation mechanism base and a lens fixing seat support; the lens rotation mechanism is installed inside the lens rotation mechanism base; the end face of the lens fixing seat support close to the base connection unit is an arc surface; the base connection unit is installed on the inner side of the arc surface of the lens fixing seat support, and the lens interface is installed on the outer side of the arc surface of the lens fixing seat support; the top fixing unit is installed on the top of the lens fixing seat support and the base connection unit.

2. The camera lens shift device according to claim 1, characterized in that: The lens rotation mechanism comprises a rotating shaft, a connecting rod, a turntable, a vertical sliding rod, a sliding rod connector, a rotating rod, a lens connector and a connecting frame; one end of the rotating shaft is connected to the lens rotation driver, and the other end is connected to the turntable, and the rotating shaft and the turntable are concentric; one end of the connecting rod passes through the turntable, and the other end is sleeved on the vertical sliding rod; the top and bottom of the vertical sliding rod are respectively connected to the sliding rod connector, and the two sliding rod connectors are respectively connected to the rotating rod, and the rotating rod passes through the rear end of the connecting frame; the connections between the connecting rod and the turntable, the connecting rod and the vertical sliding rod, and the rotating rod and the connecting frame are all movable connections.

3. The camera lens shift device according to claim 2, characterized in that: The lens rotation drive uses a manual knob with a scale or a stepper motor.

4. The camera lens shift device according to claim 1, characterized in that: The base connection unit includes a base size adjustment mechanism; the base size adjustment mechanism includes a guide rail, a slider, a base adjustment shaft, a sector block, a four-corner turntable, and an arc buckle. One end of the base adjustment shaft is connected to the base adjustment driver, and the other end is connected to the four-corner turntable after passing through the guide rail; a groove is provided at the bottom of the slider to match the guide rail; the sector block is connected to the slider through a fixed column at the top of the slider; one end of the arc buckle is connected to the sector, and the other end is connected to the four-corner turntable; the arc buckle and the sector block, the arc buckle and the four-corner turntable, the base adjustment shaft and the guide rail are all movably connected.

5. The camera lens shift device according to claim 4, characterized in that: The base connection unit also includes a base connection back plate; the base connection back plate is provided with a through-type slideway, and when the fan-shaped block slides, the fixing column of the fan-shaped block can slide along the slideway.

6. The camera lens shift device according to claim 5, characterized in that: The back panel of the mount adopts a hollow design to facilitate the connection of the camera mount cable.

7. The camera lens shift device according to claim 4, characterized in that: A right-angle frame is also provided on the fixing column of the fan-shaped block for fixing the camera mount.

8. The camera lens shift device according to claim 4, characterized in that: The base connection unit also includes an external packaging shell, and the end surface of the shell close to the lens connection unit is an arc surface.

9. The camera lens shift device according to any one of claims 1 to 8, characterized in that: The outer edge of the lens rotation mechanism base is provided with bolt holes for connecting external equipment.

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