An optical lens coaxiality control device

Abstract

An optical lens coaxiality control device belongs to the field of optical lens coaxiality control. This utility model includes an automatic angle adjustment fixture, a planar lens, a light emitter, a light receiver, an alignment and correction display screen, a computer controller, and a housing. The computer controller's control system judges different working conditions. The automatic angle adjustment fixture, light emitter, light receiver, planar lens, and computer controller cooperate to adjust the angle of the planar lens according to the offset angle between the lens optical axis and the light emitter optical axis under different conditions, thereby achieving optical lens coaxiality alignment and correction. The computer controller performs corresponding calculations based on the offset position of the reflected light relative to the index crosshairs and transmits the calculated data to the automatic angle adjustment fixture via cable to adjust the angle of the planar lens, thus achieving optical lens coaxiality control and solving the problem of needing manual adjustment of the angle fixture to achieve optical lens coaxiality alignment. Therefore, this provides an optical lens coaxiality control device with good adaptability, high accuracy, high precision, and convenient control, which is of great significance for the coaxiality control of optical lenses.

Description

Technical Field

[0001] This utility model relates to the field of optical lens coaxiality control. Background Technology

[0002] In recent years, as the Chinese people have increasingly higher requirements for the precision of equipment such as cameras, the precision requirements for core components such as lenses have also become higher. During the process of manually calibrating the coaxiality of lenses, deviations may occur, resulting in low coaxiality of manually assembled lenses, and requiring workers to have sufficient experience.

[0003] Currently, lens coaxial alignment is mostly done manually. Manual alignment has a high error rate and low production efficiency. Furthermore, existing mechanical devices require manual adjustment of the lens angle offset, followed by observation of the coaxial alignment through an eyepiece. These factors lead to drawbacks such as long lens angle adjustment time, high manual measurement error, and long product production cycles.

[0004] In summary, there is an urgent need to develop a control device suitable for coaxiality adjustment of optical lenses to solve the aforementioned technical problems. Utility Model Content

[0005] This invention addresses the problems of high skill requirements for operators and high human error and long correction cycles in existing optical lens coaxiality control processes. It proposes an optical lens coaxiality control device to reduce production cycles and optical lens coaxiality adjustment time. Furthermore, it eliminates, to some extent, the coaxiality errors caused by human error during alignment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an optical lens coaxiality control device, mainly comprising an automatic angle adjustment fixture, a light emitter, a light receiver, a planar lens, a computer controller, an alignment and calibration display screen, and a machine tool housing.

[0007] Preferably, the automatic angle adjustment fixture mainly includes a motor, support frame, angle adjustment fixture, lens fixing component, plane lens, three-jaw chuck clamp body, jaw adjustment hole, lifting screw, chuck teeth, angle fixture clamp body, universal joint, angle adjustment plate, support plate, lifting nut, bevel gear pair, flange, clamp body flange hole, and three-jaw chuck flange hole; the motor and support frame are integrally welded in a cross-shaped symmetrical manner; the lens fixing component and the three-jaw chuck clamp body are connected by threads; the jaw adjustment hole adjusts the chuck teeth to clamp the lens fixing component; the three-jaw chuck flange hole of the three-jaw chuck clamp body is connected to the angle fixture clamp body by high-strength bolts; the lifting screw and lifting nut have eight sets of components, each set of components including a motor, bevel gear pair, lifting screw, lifting nut, universal joint, and support plate, and every four sets of components form an angle adjustment plate, and the component sizes and models are required to be consistent. The eight components adjust the eight angular positions of the lens to meet its high-precision angle adjustment requirements; the angle adjustment fixture is connected to the housing by flange bolts, and this connection method can withstand a large load.

[0008] Preferably, the light emitter and receiver mainly consist of: a light source, a condenser lens assembly, an autocollimating reticle, a beam splitter, an objective lens, a reflecting mirror (i.e., a plane lens), a semi-reflecting mirror, a total reflecting mirror, a biline reticle, an eyepiece, a human eye, a slit, a condenser lens, a photoelectric receiving element, a locking valve, and a rotating handle. After moving the instrument to the appropriate position using the rotating handle, the locking valve is tightened to secure the instrument. The light emitted from the light source illuminates the autocollimating reticle through the condenser lens assembly, then passes through the objective lens to form a parallel beam, which is directed towards the plane lens. After reflection by the plane lens and the beam splitter, the light reaches the semi-reflecting mirror, where it is split into two beams. One beam is reflected by the total reflecting mirror and imaged onto the biline reticle of the eyepiece, allowing the human eye to perform coarse alignment and visual measurement. The other beam is imaged onto the slit and converged by the condenser lens onto the photoelectric receiving element. The photoelectric receiving element transmits the signal to the computer controller, where it is processed and displayed on the alignment and calibration display screen. The light is modulated by moving relative to the crosshair shadow surface through a light-transmitting slit. The movement process is displayed on the alignment and calibration display screen, and the workers observe the alignment status.

[0009] Preferably, the computer controller and alignment / calibration display screen mainly consist of: a computer host, a computer display screen, cables, and a real-time display screen. One end of the cable connects to the light receiver, and the other end connects to the computer host. The computer host is then connected to the computer display screen via cables, allowing operators to assemble and modify the control program. The computer host is also connected to the real-time display screen via cables, facilitating workers to observe the calibration status and replace the coaxially calibrated lens assembly.

[0010] Preferably, the machine tool housing mainly includes a spindle head, a machine head, a control cabinet, a machine bed, a cooling circulation system, a guide rail system, and coolant nozzles; the spindle head and the automatic angle adjustment fixture are connected by bolts; the machine head and the spindle head are fixedly connected by a flange and bolts; the control cabinet and the machine bed are fixed at their four corners with hexagonal bolts; the cooling circulation system and the machine bed are connected by bolts through an annular flange at the bottom of the coolant tank, and a rubber gasket sealing structure is used between the flanges; between the machine bed and the guide rail system, a T-slot is provided on the housing, and the guide rail slides with the base through a positioning bracket to achieve lateral positioning; a rubber-metal composite shock-absorbing pad is added between the guide rail and the contact surface to improve the lens alignment accuracy. Attached Figure Description

[0011] Figure 1 A three-dimensional schematic diagram of the optical lens coaxiality control device provided by this utility model;

[0012] Figure 2 A three-dimensional schematic diagram, a front view, and a side view of the automatic adjustment fixture provided by this utility model;

[0013] Figure 3 A three-dimensional schematic diagram and a structural cross-sectional view of the light receiver and light emitter provided by this utility model;

[0014] Figure 4 Front view of the computer controller and alignment correction display screen provided by this utility model;

[0015] Figure 5 This is a three-dimensional schematic diagram of the machine tool housing provided by this utility model.

[0016] In the diagram, 1—Automatic angle adjustment fixture, 2—Light emitter, 3—Light receiver, 4—Planar lens, 5—Computer controller, 6—Alignment and calibration display screen, 7—Machine tool housing, 101—Motor, 102—Support frame, 103—Angle adjustment fixture, 104—Lens fixing component, 105—Three-jaw chuck clamp body, 106—Chuck jaw adjustment hole, 107—Lifting screw, 108—Chuck teeth, 109—Angle fixture clamp body, 110—Universal joint, 111—Angle adjustment disc, 112—Support plate, 113—Lifting screw nut, 114—Bevel gear pair, 115—Flange, 116—Clamp body flange hole, 117—Three-jaw chuck flange hole, 2 01—Light source, 202—Condenser assembly, 203—Autocollimation reticle, 204—Beam splitter prism, 205—Objective lens, 206—Partial reflection mirror, 207—Total reflection mirror, 208—Double-line reticle, 209—Eyepiece, 210—Human eye, 211—Slit, 212—Condenser lens, 301—Photoelectric receiving element, 302—Pressure valve, 303—Rotating handle, 501—Computer host, 502—Computer display screen, 503—Cable, 604—Real-time display screen, 701—Spindle head, 702—Machine head, 703—Control cabinet, 704—Machine bed, 705—Cooling circulation system, 706—Guide rail system, 707—Coolant nozzle. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "horizontal", "vertical", etc., which indicate orientation or positional relationship, are based on the orientation or positional relationship in the accompanying drawings and should be interpreted broadly.

[0019] A three-dimensional schematic diagram of a lens adjustment device for automatic alignment, such as... Figure 1 As shown, the main components include an automatic angle adjustment fixture 1, a light emitter 2, a light receiver 3, a planar lens 4, a computer controller 5, an alignment and calibration display screen 6, and a machine tool housing 7. The component consisting of the light emitter 2 and the light receiver 3 on the machine tool housing 7 is connected to the housing track. The light receiver 3 is connected to the computer controller 5 via a cable, receives and processes the alignment signal, and then controls the automatic angle adjustment fixture 1 to adjust the coaxiality of the optical lens via the cable. The coaxiality of the optical lens is displayed in real time on the alignment and calibration display screen 6.

[0020] A three-dimensional schematic diagram and front and side views of the automatic angle adjustment fixture, as shown below. Figure 2As shown, the motor 101 and the support frame 102 are connected to the angle adjustment fixture 103 in two layers. The first layer is for coarse angle adjustment and the second layer is for fine angle adjustment. The lens fixing component 104 is clamped by a three-jaw chuck to prevent lens deformation caused by direct clamping. The lens fixing component 104 and the three-jaw chuck fixture 105 are connected by a threaded connection. After receiving the feedback signal from the computer controller 5, the motor 101 drives the bevel gear pair 114 to move. The lifting screw 107 and the lifting nut 113 move relative to each other, so that the fixture drives the lens to adjust the angle. Each disc is equipped with four sets of the above components, and the eight sets of components in the two discs are evenly connected on the transition disc, so that the lens angle adjustment is more precise.

[0021] A three-dimensional schematic diagram and a structurally sectional view of the light receiver and light emitter, as shown below. Figure 3 As shown, the light emitted from the light source 201 illuminates the autocollimation reticle 203 after passing through the condenser lens assembly 202. The resulting crosshair-shaped rays pass through the objective lens 205 to form a parallel beam, which then strikes the plane lens 4. The light reflected back by the mirror is reflected by the beam splitter prism 204 and projected onto the semi-reflective mirror 206, where it is split into two beams. One beam is reflected by the total reflection mirror 207 and imaged onto the double-line reticle 208 of the eyepiece 209. The human eye 210 can then perform coarse alignment and visual measurement through the eyepiece 209. The other beam is imaged onto the light-transmitting slit 211 and converged onto the photoelectric receiving element 301 by the condenser lens 212.

[0022] The main view of the computer controller and alignment calibration display, such as Figure 4 As shown, after the automatic angle control fixture 1 clamps the lens, it holds the lens and makes uniform circular motion around the central axis. When the lens is not coaxial with the central axis, the crosshairs reflected in the light receiver 3 will exhibit a circular motion effect with the movement of the fixture. When the lens is coaxial with the central axis, the crosshairs reflected in the light receiver 3 will stabilize at a certain point. The more stable this point is, the better the coaxiality. The computer controller 5 analyzes the crosshair motion image acquired by the light receiver 3. It calculates the center of the circle presented by the crosshairs reflected back from the lens as the lens moves with the fixture using a circle center detection algorithm. Then, it uses the position of this center to control the motor to adjust the angle until the crosshairs stabilize at a single point.

[0023] A three-dimensional schematic diagram of the machine tool housing, such as Figure 5 As shown, the spindle head 701 has a flange for easy connection with the automatic angle adjustment fixture 1; the spindle head 701 and the machine tool head 702 are connected by a flange to ensure the concentricity of the spindle head 701; the control cabinet 703 supplies power to the entire machine tool; the machine tool bed 704 supports the reasonable operation of components such as the guide rail system 706; the cooling circulation system 705 and the coolant nozzle 707 can cool down the machine tool when machining lens alloy parts.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. An optical lens coaxiality control device, characterized in that, include: The automatic angle adjustment fixture (1), light emitter (2), light receiver (3), plane lens (4), computer controller (5), alignment and calibration display screen (6), and machine tool housing (7) are included. The automatic angle adjustment fixture (1) mainly consists of a motor (101), support frame (102), angle adjustment fixture (103), lens fixing component (104), three-jaw chuck clamp body (105), jaw adjustment hole (106), lifting screw (107), chuck teeth (108), angle fixture clamp body (109), universal joint (110), angle adjustment plate (111), and support. Plate (112), lifting screw nut (113), bevel gear pair (114), flange (115), clamp body flange hole (116), three-jaw chuck flange hole (117); motor (101) and support frame (102) are integrally welded in a cross-shaped symmetrical manner; lens fixing part (104) and three-jaw chuck clamp body (105) are connected by threads; jaw adjustment hole (106) adjusts the chuck teeth (108) to clamp the lens fixing part (104); the three-jaw chuck flange hole (117) of the three-jaw chuck clamp body (105) and the angle clamp clamp body (109) are connected by bolts; lifting screw (107) and the lifting screw nut (113) have eight sets of components. Each set of components includes a motor (101), a bevel gear pair (114), a lifting screw (107), a lifting screw nut (113), a universal joint (110), and a support plate (112). Every four sets of components form an angle adjustment plate, and the component sizes and models are required to be consistent. The eight components adjust the eight angular positions of the lens to meet its high-precision angle adjustment requirements. The angle adjustment fixture (103) is connected to the housing by a flange (115) bolt. This connection method can withstand a large load. The light emitter (2) and the light receiver (3) The integrated structure has the advantages of high coaxiality accuracy, small space occupation and strong anti-interference. The straight track connection between the computer controller (5) and the box body ensures its horizontality and verticality. The computer controller (5) is connected to the light emitter (2) and the light receiver (3) by cable. The computer controller (5) processes and analyzes the signals generated by the light emitter (2) and judges the offset of the lens angle. Then it feeds back to the automatic angle adjustment fixture (1) to make corresponding angle adjustments so as to achieve coaxiality between the optical lens and the light emitter (2). The alignment and calibration display screen shows the overlap between the crosshairs reflected back and the index differentiation line, which is convenient for workers to observe visually.

2. The optical lens coaxiality control device according to claim 1, characterized in that, The light emitter (2), light receiver (3), and plane lens (4) include: a light source (201), a condenser assembly (202), an autocollimation reticle (203), a beam splitter (204), an objective lens (205), a reflector (i.e., the plane lens (4), a semi-reflecting mirror (206), a total reflection mirror (207), a double-line reticle (208), an eyepiece (209), a human eye (210), a slit (211), a condenser lens (212), a photoelectric receiving element (301), a locking valve (302), and a rotating handle (303); the light emitted by the light source (201) passes through the condenser assembly (202), then through the autocollimation reticle (203) and the objective lens (205) to form a parallel beam, and then shines on the plane lens (4); after being reflected by the plane lens (4), the objective lens (205), and the beam splitter (204), the light is reflected by the semi-reflector (206), the objective lens (207), the beam splitter (208), the beam splitter (209), the beam splitter (204), and the beam splitter (205) to form a parallel beam, and then shines on the plane lens (4); after being reflected by the plane lens (4), the objective lens (205), and the beam splitter (204), the light is reflected by the semi-reflector (206), the beam splitter (207), the beam splitter (208), the beam splitter (209), the beam splitter (205), and the beam splitter (205) to form a parallel beam, and then shines on the plane lens (4). The light at the mirror (206) is split into two parts. One part passes through the slit (211) and the condenser lens to reach the photoelectric receiving element and be received by the instrument. The other part passes through the total reflection mirror (207) and the double-line reticle (208) and then through the eyepiece to reach the human eye. The clamping valve (302) fixes the instrument on the machine tool guide rail. When the clamping valve (302) is released, the rotating handle (303) is turned to push the instrument to move on the guide rail. The structure of the light emitter (2) is generally composed of infrared light-emitting diodes, which are responsible for emitting infrared light and have a specific direction and angle. The light receiver (3) is mostly a silicon phototransistor, which is used to receive the reflected light. The received light is processed by the computer controller (5) to calculate the angle change and then fed back to the automatic angle adjustment fixture (1) to make corresponding angle adjustments, thereby achieving the coaxiality of the optical lens and the light emitter (2).

3. The optical lens coaxiality control device according to claim 2, characterized in that, The computer controller (5) and alignment and calibration display screen (6) include: computer host (501), computer display screen (502), cable (503), and real-time display screen (604); after the initial position of the plane lens (4) is set, the clamp holds the plane lens (4) and makes uniform circular motion around the central axis. When the optical axis of the plane lens (4) is not coaxial with the central axis, the crosshairs reflected to the light receiver (3) will present a circular motion effect with the movement of the clamp. When the lens is coaxial with the central axis, the crosshairs are stable at a certain point. The more stable the point is, the better the coaxiality. The light receiver (3) receives the collected crosshair motion signal and transmits it to the computer controller through the cable. The center of the circle presented by the crosshairs as the clamp moves is calculated by the center detection algorithm. The clamp is adjusted by the center position until the crosshairs on the real-time display screen (604) are stable at a certain point.

4. The optical lens coaxiality control device according to claim 3, characterized in that, The machine tool housing (7) includes: a spindle head (701), a machine head (702), a control cabinet (703), a machine bed (704), a cooling circulation system (705), a guide rail system (706), and a coolant nozzle (707); the spindle head (701) and the automatic angle adjustment fixture (1) are connected by bolts; the machine head (702) and the spindle head (701) are fixedly connected by flanges and bolts; the control cabinet (703) and the machine bed (704) are fixed at their four corners by hexagonal bolts; the cooling circulation system and the machine bed are connected by bolts through the annular flange at the bottom of the coolant tank, and a rubber gasket sealing structure is used between the flanges; a T-slot is provided on the housing between the machine bed (704) and the guide rail system (706), and the guide rail slides with the base through a positioning bracket to achieve lateral positioning. A rubber-metal composite shock-absorbing pad is added between the guide rail and the contact surface to improve the lens alignment accuracy.

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