A sapphire aspherical lens coating equipment

Abstract

The utility model discloses a kind of sapphire aspherical lens coating equipment, specifically related to optical lens processing technical field, including base, the middle part of the base bottom is fixed with support column, the inner wall top of support column is fixed with suction pump, the middle part of the base top is fixed with sealing seat, the base top is provided with lifting mechanism for driving sealing cover, the top of sealing seat is fixed with support plate by cushion block, the middle part of the support plate top is fixed with servo motor.This device is matched with the rotating block of hollow circular table shape by setting the limiting ring of hollow circular table shape, and multiple-stage inclined placing groove is opened in the inner wall of limiting ring, the self-adapting radial limiting and quick clamping of different size lenses are realized, fundamentally eliminate the coating shadow problem caused by clamp shielding, so as to reach without adjusting can be adapted to multiple size lenses for use, the effect of limiting lens from lens side.

Description

Technical Field

[0001] This utility model relates to the field of optical lens processing technology, specifically to a coating equipment for sapphire aspherical lenses. Background Technology

[0002] Sapphire crystal, with its extremely high hardness, excellent light transmission, good thermal stability, and outstanding chemical inertness, has become a key window and lens material for high-end optical systems. Aspherical lenses can effectively eliminate aberrations such as spherical aberration and coma, simplify the structure of optical systems, and improve image quality. Sapphire aspherical lenses, combining the advantages of both materials and design, are widely used in military optoelectronic systems, aerospace detection, high-end medical equipment, lidar, and high-quality photographic lenses.

[0003] Currently, vacuum coating technology is commonly used in the industry for coating optical lenses. The general workflow is to first load the lens to be coated onto the workpiece holder in the vacuum chamber, then evacuate to a certain pressure, and then heat the film material through an evaporation source to make it vaporize or melt and splash. The film particles fly in an almost straight path and are deposited on the lens surface, thus forming a thin film.

[0004] When the above-mentioned device coats the lens, it is necessary to clamp the lens to maintain the planetary motion of the lens and then move the lens. Even if a relatively thin limiting mechanism is used in the clamping part, there will be some obstruction of the lens, resulting in uneven coating. At the same time, when coating lenses of different sizes, different types of clamps are required, and it is very inconvenient to change or adjust the clamps. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a coating equipment for sapphire aspherical lenses, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a coating equipment for sapphire aspherical lenses, including a base, a support column fixed in the middle of the bottom of the base, an air pump fixed in the top of the inner wall of the support column, a sealing seat fixed in the middle of the top of the base, a lifting mechanism for driving the sealing cover provided in the top of the base, a support plate fixed in the top of the sealing seat by a pad, a servo motor fixed in the middle of the top of the support plate, a rotating block fixed in the power output end of the servo motor, second support rods fixed around the top of the support plate, and limit rings fixed in the top of the multiple second support rods, with placement grooves opened in the inner wall of the limit rings.

[0007] Furthermore, the placement slots are arranged at an angle, and there are multiple placement slots, with the diameter of the multiple placement slots decreasing in stages from top to bottom.

[0008] Furthermore, the limiting ring is in the shape of a hollow frustum, the rotating block is also in the shape of a frustum, and the central axis of the limiting ring and the central axis of the rotating block are collinear.

[0009] Furthermore, the sealing cover is hollow rectangular in shape, with a water groove inside. A water inlet pipe is connected through and sealed to the top of one side of the sealing cover, and a drain pipe is connected through and sealed to the bottom of the other side of the sealing cover.

[0010] Furthermore, the lifting mechanism includes two columns, with the bottom ends of the two columns fixed to the middle of the top two sides of the base, and sliders fixed to both sides of the sealing cover. The two sliders are respectively connected to the two columns through a through-hole. A first support rod is fixed to the top of the column, and an electric telescopic rod is fixed to the middle of the first support rod. The power output end of the electric telescopic rod is fixed to the top of the outer wall of the sealing cover.

[0011] Furthermore, the top of the sealing seat is provided with a slot, which is used in conjunction with the bottom of the sealing cover, and a rubber strip is provided on the inner wall of the slot.

[0012] Furthermore, a pressure gauge is fixed to one side of the top of the sealing seat, and a control panel is fixed to one side of the base.

[0013] Furthermore, through holes are provided at the connection points of the base, sealing seat, and support column, and a one-way valve is provided at the air inlet end of the air pump, with the one-way valve located at the through hole.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. This application achieves adaptive radial positioning and quick clamping of lenses of different sizes by setting a hollow frustum-shaped limiting ring and a frustum-shaped rotating block, and opening multi-level inclined placement grooves on the inner wall of the limiting ring. This fundamentally eliminates the coating shadow problem caused by the clamp obstruction, thereby achieving the effect of fitting multiple sizes of lenses without adjustment and limiting the lens from the side of the lens.

[0015] 2. This application uses a lifting mechanism to drive the sealing cover to be precisely pressed into the slot with a rubber strip. Combined with a vacuum pump and a one-way valve, a vacuum environment can be quickly formed. After the coating is completed, external cooling water is injected through the water inlet pipe, and the sealing cover is cooled down through water circulation. This quickly absorbs the internal heat, making the lens cool down faster, thus achieving the effect of rapid vacuum during coating and rapid cooling after coating. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the sealing cap structure of this utility model; Figure 3 This is a schematic diagram of the structure above the base of this utility model; Figure 4 This is a partial structural cross-sectional schematic diagram of the present invention; Figure 5 The schematic diagram shows the position and structure of the rotating block and lens in the processing state of this utility model.

[0018] The labels in the diagram represent: 1. Base; 2. Support column; 3. Air pump; 4. Check valve; 50. Lifting mechanism; 51. Column; 52. Slider; 53. Sealing cover; 531. Water tank; 532. Water inlet pipe; 533. Drain pipe; 54. First support rod; 55. Electric telescopic rod; 6. Control panel; 7. Sealing seat; 8. Slot; 9. Pressure gauge; 10. Pad; 11. Support plate; 12. Second support rod; 13. Limit ring; 14. Placement slot; 15. Servo motor; 16. Rotating block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0021] This application discloses a coating device for sapphire aspherical lenses, including a base 1, a support column 2 fixed at the center of the bottom of the base 1, a vacuum pump 3 fixed at the top of the inner wall of the support column 2, a sealing seat 7 fixed at the center of the top of the base 1, a lifting mechanism 50 provided at the top of the base 1, a support plate 11 fixed at the top of the sealing seat 7 by a pad 10, a servo motor 15 fixed at the center of the top of the support plate 11, a rotating block 16 fixed at the power output end of the servo motor 15, second support rods 12 fixed around the top of the support plate 11, and a limit ring 13 fixed at the top of the multiple second support rods 12, with a placement groove 14 opened on the inner wall of the limit ring 13.

[0022] Reference Appendix Figure 3 and 4 The placement slot 14 is inclined and there are multiple placement slots 14. The diameter of the multiple placement slots 14 decreases in stages from top to bottom. The multiple placement slots 14 are suitable for use with circular aspherical lenses of various sizes. The inclined placement slots 14 prevent the lens from falling off when it is rotated by the rotating block 16 and the limiting ring 13. The limiting ring 13 is made of soft, clean and highly wear-resistant material.

[0023] Reference Appendix Figure 3 and 4 The limiting ring 13 is in the shape of a hollow frustum, and the rotating block 16 is also in the shape of a frustum. The central axis of the limiting ring 13 and the central axis of the rotating block 16 are collinear. The diameter of the top of the rotating block 16 is smaller than that of the bottom. The two are matched to squeeze the lens to prevent the lens from falling off during rotation. The surface of the rotating block 16 is covered with an elastic material (such as silicone), and its curvature is matched with the back of the lens to ensure uniform contact and provide friction to drive the lens to rotate. The servo motor 15 is set to keep the rotating block 16 rotating at a low speed. The rotating block 16 drives the lens to rotate at a low speed and rotates at a low speed inside the placement groove 14.

[0024] Reference Appendix Figure 2 The sealing cover 53 is a hollow rectangular shape, with a water tank 531 inside. A water inlet pipe 532 is connected to the top of one side of the sealing cover 53, and a drain pipe 533 is connected to the bottom of the other side of the sealing cover 53. The water inlet pipe 532 and the drain pipe 533 are connected to the sealing cover 53 by welding or high-pressure sealing joints to ensure that the water tank 531 is isolated from the vacuum chamber. After the coating is completed, the temperature inside the sealing cover 53 and the lens are both high. External cooling water is introduced through the water inlet pipe 532, and the sealing cover 53 is cooled down through water circulation, which quickly absorbs the internal heat and makes the lens cool down faster.

[0025] Reference Appendix Figure 1The lifting mechanism 50 includes two columns 51. The bottom ends of the two columns 51 are fixed to the middle of the top two sides of the base 1, respectively. The sealing cover 53 has sliders 52 fixed on both sides. The two sliders 52 are connected to the two columns 51 through a through-hole. The top of the column 51 is fixed with a first support rod 54. The middle of the first support rod 54 is fixed with an electric telescopic rod 55. The power output end of the electric telescopic rod 55 is fixed to the top of the outer wall of the sealing cover 53. By controlling the electric telescopic rod 55 to shorten, the sealing cover 53 is moved upward. The column 51 and the slider 52 cooperate to make the movement of the sealing cover 53 more stable. After the lens is placed, the electric telescopic rod 55 is extended.

[0026] Reference Appendix Figure 2 The top of the sealing seat 7 is provided with a slot 8, which is used in conjunction with the bottom of the sealing cover 53. The inner wall of the slot 8 is provided with a rubber strip. When the electric telescopic rod 55 extends, the sealing cover 53 enters the slot 8. The slot 8 is embedded with a rubber strip. The bottom of the sealing cover 53 is provided with a flange. When pressed into the slot, an interference fit is formed to ensure vacuum sealing.

[0027] Reference Appendix Figure 2 The sealing seat 7 has a pressure gauge 9 fixed on one side of its top, and a control panel 6 fixed on one side of its base 1. The pressure inside the sealing seat 7 is determined by the pressure gauge 9. The sealing cover 53 is made of transparent material, which allows for better viewing of the pressure gauge 9 from the outside. The control panel 6 is electrically connected to the servo motor 15, the electric telescopic rod 55, and the air pump 3.

[0028] Reference Appendix Figure 2 The base 1, sealing seat 7 and support column 2 are all connected by through holes. The air pump 3 is equipped with a one-way valve 4 at the air inlet. The one-way valve 4 is located at the through hole. After the sealing cover 53 is connected to the sealing seat 7, the air pump 3 is controlled to work and extract the gas inside the sealing cover 53.

[0029] The workflow of this utility model is as follows: First, the operator places the sapphire aspherical lens to be coated onto the inclined placement groove 14 within the limiting ring 13, which matches the lens's diameter, according to the lens's size. Due to its own weight and the guidance of the inclined groove, one edge of the lens rests against the limiting ring 13, and the other edge rests against the rotating block 16. After the lens is placed, the electric telescopic rod 55 is extended, causing the sealing cover 53 to move downwards. The column 51 and the slider 52 cooperate to make the movement of the sealing cover 53 more stable. The sealing cover 53 enters the slot 8, and the rubber strip fills the gap between the two, achieving a seal between the sealing seat 7 and the sealing cover 53. Then, the air pump 3 is operated to extract the gas inside the sealing cover 53. The pressure inside the sealing seat 7 is judged by the pressure gauge 9. When the pressure reaches a certain level... Table 9 shows that after the predetermined vacuum level is reached, the vacuum pump 3 is turned off, and the one-way valve 4 prevents external air from entering. Then, the servo motor 15 is started through the control panel 6, and the rotating block 16 maintains a low speed rotation. The rotating block 16 drives the lens to rotate at a low speed and rotates at a low speed inside the placement tank 14 to achieve uniform coating. During this process, the evaporation source or sputtering source (not shown in the figure, which is a well-known technology in the field and is usually located on the top inside the sealing cover 53) can be turned on to start the coating. After the coating is completed, the servo motor 15 is stopped. The temperature inside the sealing cover 53 and the lens is high. External cooling water is introduced through the water inlet pipe 532. The sealing cover 53 is cooled down through water circulation, which quickly absorbs the internal heat and makes the lens cool down faster.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coating apparatus for sapphire aspherical lenses, characterized in that: The base includes a base (1), a support column (2) is fixed at the middle of the bottom of the base (1), an air pump (3) is fixed at the top of the inner wall of the support column (2), a sealing seat (7) is fixed at the middle of the top of the base (1), a lifting mechanism (50) is provided at the top of the base (1), a support plate (11) is fixed at the top of the sealing seat (7) by a pad (10), a servo motor (15) is fixed at the middle of the top of the support plate (11), a rotating block (16) is fixed at the power output end of the servo motor (15), and second support rods (12) are fixed around the top of the support plate (11). A limit ring (13) is fixed at the top of the multiple second support rods (12), and a placement groove (14) is opened on the inner wall of the limit ring (13).

2. The coating equipment for sapphire aspherical lenses according to claim 1, characterized in that: The placement slot (14) is arranged at an angle, and there are multiple placement slots (14). The diameter of the multiple placement slots (14) decreases in stages from top to bottom.

3. The coating equipment for sapphire aspherical lenses according to claim 2, characterized in that: The limiting ring (13) is in the shape of a hollow frustum, and the rotating block (16) is also in the shape of a frustum. The central axis of the limiting ring (13) and the central axis of the rotating block (16) are collinear.

4. The coating equipment for sapphire aspherical lenses according to claim 1, characterized in that: The sealing cap (53) is hollow rectangular in shape. A water tank (531) is provided inside the sealing cap (53). A water inlet pipe (532) is connected through the top of one side of the sealing cap (53), and a drain pipe (533) is connected through the bottom of the other side of the sealing cap (53).

5. The coating equipment for sapphire aspherical lenses according to claim 1, characterized in that: The lifting mechanism (50) is used to drive the sealing cover (53) to rise and fall. The lifting mechanism (50) includes a column (51), a slider (52), a first support rod (54), and an electric telescopic rod (55). There are two columns (51) and two sliders (52). The bottom ends of the two columns (51) are fixed to the middle of the top two sides of the base (1). The two sliders (52) are fixed to the two sides of the sealing cover (53). The two sliders (52) are connected to the two columns (51) through a through-hole. The electric telescopic rod (55) is fixed in the middle of the first support rod (54). The power output end of the electric telescopic rod (55) is fixed to the top of the outer wall of the sealing cover (53).

6. The coating equipment for sapphire aspherical lenses according to claim 5, characterized in that: The top of the sealing seat (7) is provided with a slot (8), which is used in conjunction with the bottom of the sealing cover (53), and a rubber strip is provided on the inner wall of the slot (8).

7. The coating equipment for sapphire aspherical lenses according to claim 1, characterized in that: A pressure gauge (9) is fixed to one side of the top of the sealing seat (7), and a control panel (6) is fixed to one side of the base (1).

8. The coating equipment for sapphire aspherical lenses according to claim 1, characterized in that: The base (1), sealing seat (7) and support column (2) are all connected by through holes, and the air pump (3) is equipped with a one-way valve (4) at the air inlet, and the one-way valve (4) is located at the through hole.

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