Flange-free film coating clamp for optical element

Abstract

The utility model relates to a flange-free film coating clamp for an optical element, which belongs to the technical field of optical films and is applied to the field of film coating procedures of optical products. According to the flange-free film coating clamp for the optical element, a limiting baffle is arranged on the left side of the clamp, two round connecting rods are arranged on the limiting baffle, and the right ends of the two round connecting rods and the positions close to the limiting baffle are movably sleeved with large-force springs respectively; a plurality of one-way limiting plates and a plurality of two-way limiting plates are arranged on the two circular connecting rods and are positioned on the right side of the strong force spring; a semicircular groove is formed in one side of the one-way limiting plate; semicircular grooves are formed in the left side and the right side of the bidirectional limiting plate, and the semicircular grooves in the left side and the right side are in mirror symmetry; clamping grooves are formed in the semicircular grooves of the one-way limiting plate and the two-way limiting plate along the center positions of the side vertical faces. The clamp is provided with a plurality of circular limiting cavities, a plurality of optical elements are clamped and coated at the same time, the working efficiency is improved, in addition, the clamp can adapt to the optical elements of different sizes, and therefore the production cost is saved.

Description

Technical Field

[0001] The edge-free coating fixture for optical elements of the present utility model belongs to the technical field of optical thin films and is applied to the coating process field of optical products. Background Art

[0002] When processing optical elements, the propagation characteristics of light in the optical parts are often changed by coating. To ensure the coating quality, a special fixture is required to hold and position the optical elements during coating. The existing coating fixtures include grooves and baffles for fixing the optical elements, ensuring stable positioning and no displacement of the optical elements during coating in the coating machine, and making the coating on the surface of the optical parts uniform and stable. However, when using this kind of coating fixture in the prior art, during coating, for the edges of small, circular sheet-shaped optical elements with thin edges, they will be stuck inside the fixture and the bottom surface will contact the baffle, making it difficult for the circular sheet-shaped optical elements to be coated with a qualified coating layer. There will usually be coating shadows at the edges of the circular optical parts, resulting in a low qualification rate of the coating of the circular optical parts. Due to the existence of the edge in the existing coating fixture, on the one hand, the circular optical elements may be scratched; on the other hand, for some high-precision lenses, a full aperture is usually required, but during the coating process, the effective coating aperture of the circular optical elements is about 90% of the aperture of the circular optical elements, which cannot meet the coating requirement of the full aperture, resulting in many scrapped products after coating the circular sheet-shaped optical elements and increasing the production and manufacturing costs. When using the existing coating fixture to hold the optical elements for hot coating, due to the temperature rise and the different thermal shrinkage ratios of the optical elements and the fixture, the phenomenon of jamming parts often occurs. For some optical elements with large chamfers, coating fixtures with different edge sizes need to be customized according to the size of the chamfer, resulting in multiple sets of coating fixtures for the same size of optical elements due to the chamfer problem, wasting costs. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the present utility model proposes an edge-free coating fixture for optical elements to solve the problems of coating shadows, scratches, full-aperture coating, jamming parts and high costs during the coating of optical elements.

[0004] To solve the above technical problems, the technical solution of the present utility model is specifically as follows:

[0005] The edge-free coating fixture for optical elements, as Figure 1 shown, the left side of the fixture 1 is a limit baffle 2, on which there are 2 circular connecting rods 3, and the limit baffle 2 and the 2 circular connecting rods 3 are integrally formed and fixed together; the right ends of the 2 circular connecting rods 3 are provided with threads;

[0006] As Figures 2-3 shown, on the right ends of the 2 circular connecting rods 3 and near the limit baffle 2, powerful springs 11 are respectively sleeved movably;

[0007] A plurality of one-way limiting plates 6 and a plurality of two-way limiting plates 7 are installed on two circular connecting rods 3 and on the right side of the large force spring 11. The installation order close to the right side of the large force spring 11 is the one-way limiting plate 6, the two-way limiting plate 7, and the one-way limiting plate 6;

[0008] Circular through holes 8 are respectively provided at the upper and lower ends of the one-way limiting plate 6 and the two-way limiting plate 7, and the two circular connecting rods 3 are respectively inserted into the circular through holes 8;

[0009] One side of the one-way limiting plate 6 has a semi-circular groove 9; both the left and right sides of the two-way limiting plate 7 have semi-circular grooves 9, and the semi-circular grooves 9 on the left and right sides are mirror-symmetrical; a small force anti-vibration spring 12 is movably sleeved on the two circular connecting rods 3 between the two-way limiting plates 7;

[0010] A clamping groove 10 is provided at the center position of the side elevation in the semi-circular grooves 9 of the one-way limiting plate 6 and the two-way limiting plate 7;

[0011] A large force spring 11 is movably sleeved on the right ends of the two circular connecting rods 3;

[0012] An active limiting plate 4 is installed at the right end of the fixture 1. Through holes are respectively provided at the upper and lower ends of the active limiting plate 4, and the two circular connecting rods 3 are respectively inserted into the through holes. A limiting nut 5 is provided on the threads of the two circular connecting rods 3 on the right side of the active limiting plate 4.

[0013] The utility model has achieved the expected technical effects: The edge-free coating fixture for optical elements provided by the utility model has a simple structure, is easy to operate and disassemble; the one-way limiting plate and the two-way limiting plate are passed through two circular connecting rods of the fixture through circular through holes, restricting the one-way limiting plate and the two-way limiting plate from moving up and down, and can only move left and right on the two circular connecting rods, thereby improving the stability of the fixture; every two semi-circular grooves are arranged oppositely to form a circular limiting cavity, and at the same time, by arranging clamping grooves in the semi-circular grooves, it is convenient to install and disassemble the optical elements to be coated, and it can enable the edges of full-caliber, small and thin-edge circular sheet-shaped optical elements to be coated with qualified coating layers, and avoid the generation of coating shadows, improve the success rate of coating, and improve work efficiency; using the limiting cavity to clamp the optical elements avoids the situation of scratching and jamming of the optical elements; when using the fixture to install the optical elements to be coated, first loosen the limiting nut to make the whole fixture loose but not scattered, and when the optical elements are placed, lock the limiting nut to prevent the optical elements from falling off during the coating process. In addition, a large force spring is movably sleeved on the two circular connecting rods. When the limiting nut is locked, the limiting baffles and the movable limiting plates at both ends of the fixture will not be tightly attached to the one-way limiting plate, reducing the wear on the one-way limiting plate; on the other hand, a small force anti-vibration spring is arranged on the circular connecting rod between every two two-way limiting plates. By using the elasticity of the small force anti-vibration spring, every two two-way limiting plates will not damage the optical elements during the clamping process.

[0014] A plurality of one-way limiting plates and a plurality of two-way limiting plates are movably installed on the fixture, and a plurality of circular limiting cavities are formed at the same time, which can clamp and coat a plurality of optical elements at the same time, improving work efficiency; in addition, since the one-way limiting plates and the two-way limiting plates can freely move left and right on the two circular connecting rods, the size of the formed circular limiting cavity can be adjusted. The fixture of the present invention can adapt to optical elements of different sizes, thus saving production costs. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the fixture in the edge-free coating fixture for optical elements of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the edge-free coating fixture for optical elements of the present utility model, and at the same time, this figure is used as the abstract drawing.

[0017] Figure 3 It is a schematic cross-sectional structural diagram of A-A in the edge-free coating fixture for optical elements of the present utility model. Detailed Embodiments

[0018] The following further limitations need to be made to the present utility model.

[0019] A circular limiting cavity 13 is formed between the unidirectional limiting plate 6 and the bidirectional limiting plate 7; a circular limiting cavity 13 is formed between the bidirectional limiting plate 7 and the bidirectional limiting plate 7.

[0020] There are 4 large force springs 11; there are 4 small force anti-vibration springs 12.

Claims

1. Optical element non-rib coating fixture, characterized in that: The left side of the clamp (1) is a limit baffle (2), on which there are two circular connecting rods (3), and the limit baffle (2) and the two circular connecting rods (3) are integrally formed and fixed together; the right ends of the two circular connecting rods (3) are provided with threads; A strong spring (11) is movably mounted on the right ends of the two circular connecting rods (3) and close to the limit baffle (2); A plurality of one-way limit plates (6) and a plurality of two-way limit plates (7) are installed on the two circular connecting rods (3) and on the right side of the strong spring (11), and the installation order on the right side close to the strong spring (11) is the one-way limit plate (6), the two-way limit plate (7) and the one-way limit plate (6); The upper and lower ends of the one-way limiting plate (6) and the two-way limiting plate (7) are respectively provided with circular through holes (8), and the two circular connecting rods (3) are respectively inserted into the circular through holes (8); One side of the one-way limit plate (6) is provided with a semicircular groove (9); both the left and right sides of the two-way limit plate (7) are provided with semicircular grooves (9), and the semicircular grooves (9) on the left and right sides are mirror-symmetrical; a small-force anti-vibration spring (12) is movably sleeved between the two-way limit plates (7) and located on the two circular connecting rods (3); A clamping groove (10) is provided in the semicircular groove (9) of the one-way limiting plate (6) and the two-way limiting plate (7) and at the center position along the side elevation surface; A strong spring (11) is movably mounted on the right ends of the two circular connecting rods (3); A movable limit plate (4) is installed at the right end of the clamp (1), and through holes are respectively provided at the upper and lower ends of the movable limit plate (4), and two circular connecting rods (3) are respectively inserted into the through holes. A limit nut (5) is provided on the right side of the movable limit plate (4) and on the threads of the two circular connecting rods (3).

2. The optical element non-rib coating fixture according to claim 1, characterized in that: A circular limiting cavity (13) is formed between the one-way limiting plate (6) and the two-way limiting plate (7); and a circular limiting cavity (13) is formed between the two-way limiting plates (7) and the two-way limiting plates (7).

3. The optical element non-rib coating fixture according to claim 1, characterized in that: There are 4 high-force springs and 4 low-force recoil springs.

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