Optical filter assembly

Abstract

The utility model relates to an optical filter assembly, which belongs to the technical field of optical filters and comprises an optical filter body with the central wavelength of 656.3 nm and the transmittance of more than 95%. And the supporting frame is used for arranging the optical filter body. According to the optical filter assembly, the optical filter body with the central wavelength being 656.3 nm and the transmittance being larger than 95% is arranged, the optical filter assembly is suitable for astronomical photography, and the supporting frame is arranged so that the optical filter assembly can be conveniently arranged on photography equipment.

Description

Technical Field

[0001] This utility model relates to the field of optical filter technology, and in particular to an optical filter assembly. Background Technology

[0002] An optical filter is an optical device used to select a desired wavelength of radiation. For ease of use and compatibility with other components, optical filters are often mounted on a support structure to form modular filter assemblies. However, existing optical filter technologies have not been very effective in astrophotography. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a filter assembly that is suitable for use in astrophotography and is convenient to use with and install in photographic equipment.

[0004] To achieve the above-mentioned objectives, this utility model provides a filter assembly, comprising:

[0005] The filter body has a center wavelength of 656.3 nm and a transmittance greater than 95%.

[0006] A support frame is used to mount the filter body.

[0007] Furthermore, the support frame includes an edge protrusion for supporting the filter body, the edge protrusion being disposed on the side wall of the through hole, the through hole being the same size as the filter body, the top of the support frame being provided with a positioning protrusion, and the bottom of the support frame being provided with a movable positioning member.

[0008] Furthermore, the movable positioning component includes a first movable component, which is movably mounted on the support plate. One side of the first movable component has a central protrusion for limiting the rotation angle of the first movable component. The first movable component is connected to the bottom of the support frame by a first spring.

[0009] Furthermore, the support plate is also provided with a second movable member, which is rotatably connected to the support plate. The second movable member and the first movable member are symmetrically arranged about the middle protrusion. The second movable member is connected to the bottom of the support frame by a second spring.

[0010] Furthermore, the first movable member is rotatably connected to the support plate via a first positioning member, and the second movable member is rotatably connected to the support plate via a second positioning member.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] With a center wavelength of 656.3nm and a transmittance of over 95%, the filter body is suitable for astrophotography. The support frame facilitates the mounting of the filter assembly on photographic equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the support frame according to an embodiment of the present utility model;

[0015] Figure 3 This is a rear view structural diagram of the support frame according to an embodiment of the present utility model;

[0016] Figure 4 This is a transmittance curve of the filter body. Detailed Implementation

[0017] 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 embodiments of the utility model, not all embodiments. The embodiments of this utility model are described below with reference to the accompanying drawings.

[0018] refer to Figure 1-3 A filter assembly, comprising:

[0019] The filter body 2 has a center wavelength of 656.3 nm and a transmittance of more than 95%.

[0020] Support frame 1 is used to set the filter body 2.

[0021] Specifically, the filter body 2 is a filter suitable for astrophotography. Based on the characteristics of the emission lines of celestial targets and light pollution emission lines, the astrophotography filter effectively reduces the influence of harmful light, suppresses the background light of the target, improves the contrast and detail of celestial photography, saves a lot of time in the shooting process, and obtains better shooting results.

[0022] refer to Figure 4 The center wavelength of the optical filter body 2 is 656.3nm, and the transmittance is greater than 95%, such as 96%. The blocking range is 300nm to 1100nm. The blocking range refers to the range in which the optical filter is designed to block light within a specific wavelength range from passing through.

[0023] The support frame 1 is used to set the filter body 2. When the two are used together, it is convenient to install the filter body 2 on the camera equipment.

[0024] In some embodiments, the support frame 1 includes an edge protrusion 4 for supporting the filter body 2. The edge protrusion 4 is disposed on the side wall of the through hole 13. The through hole 13 is the same size as the filter body 2. The top of the support frame 1 is provided with a positioning protrusion 3, and the bottom of the support frame 1 is provided with a movable positioning member.

[0025] Specifically, the through hole 13 can be a square through hole, and the corresponding filter body 2 is also a square structure. The edge protrusion 4 is used to support the filter body 2. The filter body 2 is embedded in the through hole 13, and the outer wall of the filter body 2 is attached to the through hole 13. One edge of the filter body 2 is attached to the edge protrusion 4. Specifically, it can be fixed to the support frame 1 after being embedded by the size of the filter body 2 itself, or it can be fixed by applying glue at the connection after mating. In other embodiments of this example, the size of the filter body 2 is smaller than the size of the through hole 13, but larger than the size of the hole formed by the edge protrusion 4. That is, after the filter body 2 is installed, it can still be supported by the edge protrusion 4. After assembly, the two are fixedly connected by glue. The positioning protrusion 3 provided at the top can be used to position the support frame 1, and the movable positioning part at the bottom is used to position the support frame 1. Under the action of the positioning protrusion 3 and the movable positioning part, the filter assembly is installed with the camera equipment, so that astrophotography can be performed and a good effect can be obtained.

[0026] In some embodiments, the movable positioning member includes a first movable member 6, which is movably disposed on the support plate 5. A central protrusion 12 for limiting the rotation angle of the first movable member 6 is provided on one side of the first movable member 6. The first movable member 6 is connected to the bottom of the support frame 1 by a first spring 10.

[0027] Specifically, the first movable part 6 is set on the support plate 5 and can rotate at a certain angle. Specifically, the rotation angle is limited by setting the middle protrusion 12, that is, one side of the first movable part 6 is attached to the side wall of the middle protrusion 12 for restriction. Under the elastic force of the first spring 10, the rotation position is also limited by the middle protrusion 12. In specific use, first press the first movable part 6, at which time the first spring 10 is in a compressed state. Then, the support frame 1 is embedded and installed on the photography equipment. Then, the first movable part 6 is released. Under the elastic force of the first spring 10, the first movable part 6 is embedded into the mounting slot of the photography equipment, thus completing the installation of the support frame 1.

[0028] The first spring 10 can be connected to the bottom of the end support frame 1 by adhesive or by welding. The upper end of the first spring 10 is connected to the support frame 1, and its lower end can be fixedly connected to the first movable part 6. The connection between the edges of the first movable part 6 can be rounded to ensure safety during use.

[0029] In some embodiments, the support plate 5 is further provided with a second movable member 7, which is rotatably connected to the support plate 5. The second movable member 7 and the first movable member 6 are symmetrically arranged about the middle protrusion 12. The second movable member 7 is connected to the bottom of the support frame 1 by a second spring 11.

[0030] Specifically, the second spring 11 and the first spring 10 are symmetrically arranged about the middle protrusion 12. Their usage is the same as that of the first movable member 6 mentioned above. The two can have the same structural shape and are symmetrically arranged about the middle protrusion. The second movable member 7 also restricts its rotation angle through the middle protrusion 12.

[0031] In some embodiments, the first movable member 6 is rotatably connected to the support plate 5 via the first positioning member 8, and the second movable member 7 is rotatably connected to the support plate 5 via the second positioning member 9.

[0032] Specifically, the first positioning component 8 and the second positioning component 9 can be screws, both of which have threaded sections at their heads. The corresponding support plate 5 has threaded holes. The installation and positioning of the first positioning component 8 and the second positioning component 9 can be completed by tightening the threaded sections into the threaded holes. After installation, space is left for the first movable component 6 and the second movable component 7 to rotate smoothly, so that they can not only rotate, but also not disengage from the first positioning component 8 and the second positioning component 9.

[0033] The filter body 2, with a center wavelength of 656.3nm and a transmittance of more than 95%, is suitable for astrophotography. The support frame 1 facilitates the mounting of the filter assembly on the photographic equipment.

[0034] The technical solution of this utility model has been described above with reference to specific embodiments. However, it should be noted that the above description is only for explaining the solution of this utility model and should not be construed as a specific limitation on the scope of protection of the utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A filter assembly, characterized by, The application relates to a filter support frame. The filter support frame comprises a filter body (2) with a central wavelength of 656.3 nm and a transmittance of more than 95%; and a support frame (1) for arranging the filter body (2). The support frame (1) comprises an edge protrusion (4) for supporting the filter body (2), the edge protrusion (4) is arranged on the side wall of a through hole (13) with the same size as the filter body (2), the top of the support frame (1) is provided with a positioning protrusion (3), and the bottom of the support frame (1) is provided with a movable positioning member.

2. The filter assembly of claim 1, wherein, The movable positioning member comprises a first movable member (6) movably arranged on a support plate (5), one side of the first movable member (6) is provided with a middle protrusion (12) for limiting the rotation angle of the first movable member (6), and the first movable member (6) is connected with the bottom of the support frame (1) through a first spring (10).

3. The filter assembly of claim 2, wherein, The support plate (5) is further provided with a second movable member (7), the second movable member (7) is rotationally connected with the support plate (5), the second movable member (7) is symmetrically arranged with the first movable member (6) about the middle protrusion (12), and the second movable member (7) is connected with the bottom of the support frame (1) through a second spring (11).

4. The filter assembly of claim 3, wherein, The first movable member (6) is rotationally connected to the support plate (5) through a first positioning member (8), and the second movable member (7) is rotationally connected to the support plate (5) through a second positioning member (9).

5. The filter assembly of claim 4, wherein, ​

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