Lens frame capable of improving coating precision

Abstract

The invention provides a lens frame capable of improving coating precision, which comprises a plurality of mounting plates with annular structures which are sequentially distributed from outside to inside, and the mounting plates are provided with adjusting assemblies so as to control the mounting plates to move in the vertical direction; a plurality of containing grooves are formed in the mounting plate in the circumferential direction in a surrounding mode, and lens placing frames are movably arranged in the containing grooves. And the driving assembly drives the lens placing frames on the same mounting plate to rotate synchronously. By adjusting the height of the mounting plate and the angle of the lens placement frame, the distance between the lens placement frame and the evaporation source is adjusted, so that for the evaporation source which has a certain area and is not uniform in particle evaporation, the angle and distance between each lens placement frame and the evaporation source are accurately adjusted, and the evaporation efficiency is improved. And the evaporated particles can be vertically evaporated on the surface of the lens at equal intervals, so that the coating uniformity, namely the coating precision, is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical lens coating, and in particular to a lens frame with improved coating accuracy. Background Art

[0002] With the development of optical products, the application scope of optical lenses is getting wider and wider. In order to reduce costs and improve efficiency, high-efficiency assembly lines are generally used for mass production to meet the demand for optical lenses. Generally speaking, the manufactured optical lenses need to undergo subsequent processing to obtain good performance suitable for the application, and finally obtain products of different specifications to meet different market needs.

[0003] The coating process is one of the important steps in the subsequent processing of lens processing. Coating refers to the process of coating a single layer or multiple layers of thin film on the surface of an optical element by physical or chemical methods, and utilizing the interference of incident, reflected and transmitted light at the thin film interface to achieve focusing, collimation, filtering, reflection and refraction effects. The coating process of optical elements is as follows: first, the optical element is mounted on a coating jig, and the coating jig is set in a container; second, the container is sealed and evacuated; then, the optical element is coated at the part that needs coating by evaporation or sputtering; finally, the coated optical element is removed from the coating jig.

[0004] In order to ensure the quality of optical components, the accuracy of coating during the processing is crucial. Regarding coating accuracy, one of the important parameters is the consistency of lens coating. Taking evaporation processing as an example, in order to improve production efficiency during actual coating processing, optical lenses are usually placed on a lens frame with a curved surface structure, and then the evaporation source is set at the position corresponding to the center of the sphere at the bottom of the lens frame, so as to ensure that the distance between the optical lens and the evaporation source is the same, thereby ensuring that the coating thickness of each optical lens is uniform.

[0005] However, in actual use, the container of the evaporation source has a certain width and cannot be located at the theoretical spherical center position, resulting in a certain difference in the distance between the evaporated particles in the evaporation source and each optical lens, resulting in inconsistent final coating thickness, which affects the coating accuracy. Therefore, a device that can improve coating accuracy is needed. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a lens frame with improved coating accuracy, which solves the problem in the prior art that there is a certain difference in the distance between the evaporated particles in the evaporation source and each optical lens, resulting in inconsistent final coating thickness, which affects the coating accuracy.

[0007] According to an embodiment of the present invention, a lens frame for improving coating accuracy comprises a plurality of mounting plates of annular structures distributed sequentially from the outside to the inside, wherein the mounting plates are all arranged horizontally, and the centers of the circles are located on the same straight line along the vertical direction, and the adjacent side edges of adjacent mounting plates are closely adjacent to each other without affecting their vertical movement, and the mounting plates are respectively provided with adjustment components, so as to independently control the displacement of each mounting plate in the vertical direction;

[0008] The mounting plate is provided with a plurality of receiving grooves around the center of the circle along the circumference, the receiving grooves are vertically penetrating structures, a lens placement frame is movably provided in the receiving grooves, the lens placement frame is rotatably installed in the receiving grooves, and its rotation surface is vertical and passes through the center of the circle of the mounting plate;

[0009] It also includes a driving component corresponding to each mounting plate, which drives the lens placement frame to rotate and controls the lens placement frame on the same mounting plate to rotate synchronously, so that the angle between the lens placement frame and the horizontal plane facing the center of the circle is the same.

[0010] Furthermore, the mounting plate located in the center is a circular plate.

[0011] Furthermore, the adjustment assembly includes a vertically arranged telescopic rod, the top end of which is fixedly arranged, and the bottom end is fixedly connected to a position on the upper surface of the mounting plate where no accommodating groove is provided, thereby driving the mounting plate to move vertically.

[0012] Furthermore, the receiving groove is a vertically penetrating circular slot, and the distance between the center of the receiving groove and the center of the mounting plate where the receiving groove is located is equal.

[0013] Furthermore, the lens rack is a circular frame structure, and two rotating shafts extending oppositely are radially arranged on the outer side of the lens rack. The rotating shafts extend through the inner edge of the accommodating groove into the mounting plate and are rotatably connected to the mounting plate, so that the lens rack can rotate freely in the vertical direction.

[0014] Furthermore, the inner edge of the lens placement frame is provided with a plurality of support rods extending toward the center of the circle, and the support rods are distributed in a circular shape along the circumference.

[0015] Furthermore, a cavity is provided inside the mounting plate at a position corresponding to that between two adjacent lens placement racks, the end of the rotating shaft extends into the cavity, and a driven gear with a bevel gear structure is coaxially provided at the end of the rotating shaft, and the driven gears of a corresponding set of rotating shaft ends on two adjacent lens placement racks are meshed and connected with each other, so that the lens placement racks on the same mounting plate form a one-way chain transmission structure that is not connected at the head and tail.

[0016] Furthermore, the driving assembly includes a motor arranged on a mounting plate and a driving gear buried inside the mounting plate, the driving gear is a bevel gear structure, the output value of the motor is connected to the driving gear and controls its rotation, and the driving gear is meshedly connected with a driven gear located at the head end or the end of the chain transmission structure of the lens placement rack.

[0017] Furthermore, the diameter of the accommodating groove is larger than the outer diameter of the lens placement rack, and a bearing is provided on the inner wall of the accommodating groove and connected to the rotating shaft, so that the rotating shaft can only rotate but cannot move axially. During the rotation of the lens placement rack, the center position of the circle always coincides with the center position of the accommodating groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention sets the lens frame as a mounting plate with multiple concentric ring structures, and the height of the mounting plate is adjustable. At the same time, a lens placement frame is rotatably arranged on the mounting plate through a receiving groove, and the lens placement frame can rotate on a vertical plane passing through the center of the mounting plate. That is, by adjusting the height of the mounting plate and the angle of the lens placement frame, the distance adjustment of the lens placement frame relative to the evaporation source is achieved, so that for an evaporation source with a certain area size and uneven particle evaporation, the angle and distance of each lens placement frame relative to the evaporation source are accurately adjusted, so that the evaporated particles can be vertically and equidistantly deposited on the lens surface, thereby further improving the uniformity of the coating, that is, the accuracy of the coating.

[0020] In the present invention, the number of rings of the mounting plate can be freely adjusted, so different numbers of mounting plates can be set corresponding to different sizes of evaporation equipment, so as to adapt to different work requirements. In addition, it can also be adjusted according to the distance from the evaporation source to the lens rack in different evaporation equipment, so that all lens placement racks are located on spherical surfaces of different sizes and are always in the direction facing the evaporation source, which can increase the scope of application of the lens rack, and there is no need to set a fixed specification lens rack for each evaporation machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention in a non-working state.

[0022] Figure 2 It is a structural schematic diagram of an embodiment of the present invention in a working state.

[0023] Figure 3 It is a schematic diagram of a receiving groove and a lens placement frame in an embodiment of the present invention.

[0024] Figure 4 It is a top view of the lens placement rack in the embodiment of the present invention.

[0025] Figure 5Schematic diagram of the connection of adjacent lens placement frames in an embodiment of the present invention.

[0026] In the above drawings: 1, mounting plate; 2, telescopic rod; 3, lens placement frame; 4, driven gear; 5, driving gear; 11, receiving groove; 31, rotating shaft; 32, supporting rod. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a lens frame for improving coating accuracy, including a plurality of mounting plates 1 of annular structure distributed sequentially from the outside to the inside. In this embodiment, four mounting plates 1 are specifically provided, wherein a mounting plate 1 located in the center is a circular plate, and the other three are circular ring plates with increasing diameters. The four mounting plates 1 are all arranged horizontally, and the center of the circle is located on the same straight line along the vertical direction. The adjacent side edges of adjacent mounting plates 1 are closely adjacent, but do not affect their vertical movement with respect to each other. Adjustment components are respectively provided on the mounting plates 1, so as to independently control the displacement of each mounting plate 1 in the vertical direction.

[0029] In this embodiment, the adjustment component includes a vertically arranged telescopic rod 2, the top end of the telescopic rod 2 is fixedly arranged on the top of the vapor deposition machine, and the bottom end is fixedly connected to a position on the upper surface of the mounting plate 1 where the receiving groove 11 is not provided, thereby driving the mounting plate 1 to move vertically. In this embodiment, the telescopic rod 2 adopts an electric telescopic structure, and its specific principle refers to the prior art and is not described here. Preferably, a telescopic rod 2 is connected to the central position of the circular mounting plate 1 located in the center, and two telescopic rods 2 are symmetrically provided on the other three mounting plates 1, and the line connecting the connection points of the telescopic rod 2 on the surface of the mounting plate 1 passes through the center of the circle, so that the mounting plate 1 is evenly stressed and can remain stable during the up and down movement process.

[0030] like Figure 3As shown, specifically, the mounting plate 1 is provided with a plurality of receiving grooves 11 around the center of the circle, the receiving grooves 11 being a vertical through structure, a lens placement frame 3 being movably provided in the receiving grooves 11, the lens placement frame 3 being rotatably installed in the receiving grooves 11, and its rotation surface being vertical and passing through the center of the circle of the mounting plate 1. Further, the receiving grooves 11 are vertically through circular slots, the center of the receiving grooves 11 is at an equal distance from the center of the circle of the mounting plate 1 where it is located, and the spacing between adjacent receiving grooves 11 is also the same, so that the receiving grooves 11 are evenly distributed around the center of the circle of the mounting plate 1 where it is located. Correspondingly, the lens placement frame 3 is a circular ring frame structure, and two relatively extending rotating shafts 31 are provided radially on the outer side of the lens placement frame 3, the rotating shafts 31 penetrate from the inner edge of the receiving grooves 11 into the mounting plate 1 and are rotatably connected with the mounting plate 1, so that the lens placement frame 3 can rotate freely in the vertical direction.

[0031] like Figure 4 As shown, the inner edge of the lens placement frame 3 is provided with a plurality of support rods 32 extending toward the center of the circle, and the support rods 32 are distributed in a circumferential ring. The optical lens can be supported by the bracket, so that the optical lens placed in the lens placement frame 3 from the top is blocked by the support rods 32 and supported by the limit position. The inner diameter of the lens placement frame 3 is matched with the diameter of the optical lens, so that the optical lens remains stable after being placed, and does not shake due to rotation. The diameter of the support rod 32 is as small as possible under the premise that the load-bearing capacity allows, and the length of the support rod 32 is as short as possible under the premise of meeting the support requirements, thereby reducing its influence on the lens evaporation effect. In addition, the rotation angle of the lens placement frame 3 in the present embodiment does not exceed 60 °, so that the optical lens placed in the lens placement frame 3 from the top and supported by the support rods 32 will not fall to the outside due to rotation.

[0032] In this embodiment, the diameter of the receiving groove 11 is larger than the outer diameter of the lens placement frame 3. A bearing is provided on the inner wall of the receiving groove 11 and connected to the rotating shaft 31, so that the rotating shaft 31 can only rotate but cannot move in the axial direction. During the rotation of the lens placement frame 3, the center position of the circle always coincides with the center position of the circle of the receiving groove 11. Since the diameter of the receiving groove 11 is relatively large, no matter to which angle the lens placement frame 3 rotates, the line between its edge and the evaporation source will not be blocked by the mounting plate 1, thereby ensuring the effectiveness of evaporation.

[0033] In an embodiment of the present invention, a driving assembly is further provided corresponding to each mounting plate 1, wherein the driving assembly drives the lens placement frame 3 to rotate, and controls the lens placement frame 3 on the same mounting plate 1 to rotate synchronously, so that the angle between the lens placement frame 3 and the horizontal plane on the side facing the center of the circle is the same.

[0034] like Figure 5As shown, correspondingly, a cavity is provided inside the mounting plate 1 at a position corresponding to between two adjacent lens placement racks 3, the end of the rotating shaft 31 extends into the cavity, and a driven gear 4 with a bevel gear structure is coaxially provided at the end of the rotating shaft 31, and the driven gears 4 at the ends of a group of rotating shafts 31 on two adjacent lens placement racks 3 are meshed and connected with each other, so that the lens placement racks 3 on the same mounting plate 1 form a one-way chain transmission structure that is not connected at the head and the tail.

[0035] In a specific solution, the driving assembly includes a motor (not shown) disposed on the mounting plate 1 and a driving gear 5 buried inside the mounting plate 1, wherein the driving gear 5 is a bevel gear structure, and the output value of the motor is connected to the driving gear 5 and controls its rotation, and the driving gear 5 is meshedly connected with a driven gear 4 located at the head end or the end of the chain transmission structure of the lens placement frame 3. Through the operation of the motor and the driving gear 5, all the lens placement frames 3 on the mounting plate 1 can be driven to rotate at the same time through the connection of the driven gear 4, so as to realize the control of the angle of the lens placement frame 3. The motor on each mounting plate 1 is independently arranged, and cooperates with the telescopic rod 2 on the mounting plate 1 to work, and independently adjusts the rotation angle of each lens placement frame 3 on each mounting plate 1, so that the optical lenses on all the lens placement frames 3 correspond to the center of the evaporation source as much as possible, and the distance from the center of the evaporation source is the same, so that the thickness of the vapor deposition on each optical lens is the same.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A lens frame for improving coating accuracy, characterized in that: It comprises a plurality of mounting plates of annular structure distributed in sequence from the outside to the inside, the mounting plates are all arranged horizontally, and the centers of the circles are located on the same straight line along the vertical direction, the adjacent side edges of the adjacent mounting plates are closely close to each other, but do not affect their vertical movement, and the mounting plates are respectively provided with adjustment components, so as to independently control the displacement of each mounting plate in the vertical direction; The mounting plate is provided with a plurality of receiving grooves around the center of the circle along the circumference, the receiving grooves are vertically penetrating structures, a lens placement frame is movably provided in the receiving grooves, the lens placement frame is rotatably installed in the receiving grooves, and its rotation surface is vertical and passes through the center of the circle of the mounting plate; It also includes a driving component corresponding to each mounting plate, which drives the lens placement frame to rotate and controls the lens placement frame on the same mounting plate to rotate synchronously, so that the angle between the lens placement frame and the horizontal plane facing the center of the circle is the same.

2. A lens frame for improving coating accuracy as claimed in claim 1, characterized in that: The mounting plate in the center is a circular plate.

3. The lens frame for improving coating accuracy as claimed in claim 1, characterized in that: The adjustment assembly includes a vertically arranged telescopic rod, the top end of which is fixedly arranged, and the bottom end is fixedly connected to a position on the upper surface of the mounting plate where no accommodating groove is provided, thereby driving the mounting plate to move vertically.

4. A lens frame for improving coating accuracy as claimed in claim 1, characterized in that: The receiving groove is a vertically penetrating circular slot, and the distance between the center of the receiving groove and the center of the mounting plate where the receiving groove is located is equal.

5. A lens frame for improving coating accuracy as claimed in claim 4, characterized in that: The lens placement rack is a circular frame structure, and two rotating shafts extending oppositely are arranged radially on the outer side of the lens placement rack. The rotating shafts extend through the inner edge of the accommodating groove into the mounting plate and are rotatably connected to the mounting plate, so that the lens placement rack can rotate freely in the vertical direction.

6. A lens frame for improving coating accuracy as claimed in claim 5, characterized in that: The inner edge of the lens placement frame is provided with a plurality of supporting rods extending toward the center of the circle, and the supporting rods are distributed in a circular shape along the circumference.

7. The lens frame for improving coating accuracy as claimed in claim 5, characterized in that: A cavity is provided inside the mounting plate at a position corresponding to that between two adjacent lens placement racks, the end of the rotating shaft extends into the cavity, and a driven gear with a bevel gear structure is coaxially provided at the end of the rotating shaft. The driven gears of a corresponding set of rotating shaft ends on two adjacent lens placement racks are meshed and connected with each other, so that the lens placement racks on the same mounting plate form a one-way chain transmission structure that is not connected at the head and tail.

8. The lens frame for improving coating accuracy as claimed in claim 5, characterized in that: The driving assembly includes a motor arranged on a mounting plate and a driving gear buried inside the mounting plate. The driving gear is a bevel gear structure. The output value of the motor is connected to the driving gear and controls its rotation. The driving gear is meshed and connected with a driven gear located at the head end or the end of the chain transmission structure of the lens placement rack.

9. The lens frame for improving coating accuracy as claimed in claim 5, characterized in that: The diameter of the accommodating groove is larger than the outer diameter of the lens placement frame. A bearing is provided on the inner wall of the accommodating groove and connected to the rotating shaft, so that the rotating shaft can only rotate but cannot move axially. During the rotation of the lens placement frame, the center position of the circle always coincides with the center position of the accommodating groove.

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