Optical filter for astronomical photography

Abstract

The utility model relates to an optical filter for astronomical photography and a support frame, belongs to the technical field of optical filters, and provides the optical filter for astronomical photography, and the transmittance of the optical filter is greater than 92% when the wavelengths are 486.1 nm, 494.9 nm, 500.7 nm and 656.3 nm. On the other hand, the utility model provides a supporting frame used for supporting the optical filter, the supporting frame comprises a support body, the support body is provided with a through hole, the inner side wall of the through hole is provided with a supporting protrusion used for supporting the optical filter, and the size of the optical filter is smaller than that of the through hole. By arranging the optical filter, astronomical photography use can be met, the photographing effect is good, by arranging the support body, the through hole and the supporting protrusion, the optical filter can be installed, the optical filter is installed on the camera shooting equipment through the supporting frame, and by arranging the top protrusion and the lower positioning assembly, the supporting frame can be installed on the camera shooting equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical filter, especially a filter for astronomical photography. BACKGROUND

[0002] The filter is an optical filter. It can filter out unnecessary spectral components or interference light in incident light, reduce interference components in the background, improve the contrast of the target to the background, and thus improve the signal-to-noise ratio of the system.

[0003] In the prior art, the filter is generally used for daily shooting, and has certain deficiencies in astronomical photography, which is difficult to meet the use requirements of astronomical photography. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a filter for astronomical photography to solve the problems in the background art.

[0005] In order to achieve the above-mentioned utility model purposes, the utility model provides a filter for astronomical photography, wherein the transmittance of the filter is greater than 92% at wavelengths of 486.1nm, 494.9nm, 500.7nm and 656.3nm.

[0006] Further, the transmittance of the filter is greater than 90% at wavelengths of 475nm-505nm.

[0007] Further, the transmittance of the filter is greater than 90% at wavelengths of 650nm-660nm.

[0008] The utility model also provides a support frame for supporting the filter, which comprises a support body provided with a through hole, a support protrusion on the inner side wall of the through hole for supporting the filter, and the size of the filter being smaller than that of the through hole.

[0009] Further, the left side of the support body is provided with a left protrusion, and the right side of the support body is provided with a right protrusion.

[0010] Further, the top of the support body is provided with a top protrusion, and the bottom of the support body is provided with a lower positioning assembly.

[0011] Further, the lower positioning assembly comprises a lower shell, and the lower side of the lower shell is provided with a left positioning member and a right positioning member movably arranged.

[0012] Further, the lower shell comprises a first channel and a second channel, the left positioning member is arranged in the first channel, a first spring is arranged above the left positioning member, a left limiting protrusion is arranged on the upper end side wall of the left positioning member, and the size of the bottom of the first channel is smaller than that of the left limiting protrusion, the right positioning member is arranged in the second channel, a second spring is arranged above the right positioning member, a right limiting protrusion is arranged on the upper end side wall of the right positioning member, and the size of the bottom of the second channel is smaller than that of the right limiting protrusion.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] Through setting up the filter, astronomical photography use can be met, and the shooting effect is good, through setting up the support body, the through hole and the supporting protrusion, the filter can be installed, the filter is installed on the camera equipment through the support frame, and through setting up the top protrusion and the lower positioning assembly, the support frame can be installed on the camera equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the utility model embodiment;

[0016] Figure 2 It is a rear view structural schematic diagram of the utility model embodiment;

[0017] Figure 3 It is Figure 3 It is an enlarged sectional view structural schematic diagram of A;

[0018] Figure 4 It is a structural schematic diagram of the support frame of the utility model embodiment;

[0019] Figure 5 It is a transmittance curve diagram of the filter of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The embodiments of the utility model will be described below in combination with the drawings.

[0021] The filter 2 for astronomical photography provided in the application can effectively reduce the harmful light influence, inhibit the background light of the target, improve the contrast and detail of the celestial body shooting, save a large amount of time in the shooting process, and obtain better shooting effect.

[0022] Reference Figure 5A filter for astronomical photography, the filter 2 has a transmittance greater than 92% at wavelengths of 486.1nm, 494.9nm, 500.7nm, 656.3nm.

[0023] Specifically, the filter 2 of the present application is suitable for use in astronomical photography, and is installed on a lens. By filtering, a better astronomical photography effect can be obtained, and light with wavelengths of 486.1nm, 494.9nm, 500.7nm, and 656.3nm can pass through the filter 2, and the transmittance is greater than 92%, for example, 92.5%.

[0024] In some embodiments, the filter 2 has a transmittance greater than 90% at wavelengths of 475nm-505nm.

[0025] Specifically, the filter 2 has a transmittance greater than 90% at wavelengths of 475nm-505nm, and light with wavelengths of 475nm-505nm can pass through the filter 2, so as to obtain a better astronomical photography effect.

[0026] In some embodiments, the filter 2 has a transmittance greater than 90% at wavelengths of 650nm-660nm.

[0027] Specifically, the filter 2 has a transmittance greater than 90% at wavelengths of 650nm-660nm, and light with wavelengths of 650nm-660nm can pass through the filter 2, so as to obtain a better astronomical photography effect.

[0028] Reference Figures 1-4 A support frame for supporting a filter, the support frame comprises a support body 1, the support body 1 is provided with a through hole 3, and a support protrusion 4 for supporting the filter 2 is arranged on the inner side wall of the through hole 3. The size of the filter 2 is smaller than the size of the through hole 3.

[0029] Specifically, the filter 2 is installed on the support frame, and is specifically installed in the through hole 3. The through hole 3 does not block the filter 2, and the position of the filter 2 is supported and limited by the support protrusion 4. The size of the filter 2 is smaller than the size of the through hole 3, so that the filter 2 can be easily installed. After installation, the filter 2 can be clamped in the through hole 3 to a certain extent by itself, and glue can also be applied to prevent the filter 2 from being separated from the support frame. The size of the support protrusion 4 is small, so as to avoid blocking the filter 2.

[0030] In some embodiments, a left protrusion 5 is arranged on the left side of the support body 1, and a right protrusion 6 is arranged on the right side of the support body 1.

[0031] Specifically, the left protrusion 5 and the right protrusion 6 are used for positioning when the support frame is installed, so as to ensure that the support frame is installed in the correct position after installation.

[0032] In some embodiments, the top of the support body 1 is provided with a top protrusion 7, and the bottom of the support body 1 is provided with a lower positioning assembly.

[0033] Specifically, the top protrusion 7 is used to position above the support body 1, and the support frame is installed on the lens of the camera equipment by setting the lower positioning assembly.

[0034] In some embodiments, the lower positioning assembly includes a lower shell 12, and the lower side of the lower shell 12 is provided with a left positioning piece 8 and a right positioning piece 9 movably arranged.

[0035] Specifically, the left positioning piece 8 and the right positioning piece 9 are clamped onto the lens of the camera equipment during installation, and the left positioning piece 8 and the right positioning piece 9 are pressed during installation, and then the left positioning piece 8 and the right positioning piece 9 are loosened to be clamped.

[0036] In some embodiments, the lower shell 12 includes a first channel and a second channel 13, the left positioning piece 8 is arranged in the first channel, a first spring is arranged above the left positioning piece 8, a left limiting protrusion is arranged on the upper end side wall of the left positioning piece 8, the size of the bottom of the first channel is smaller than that of the left limiting protrusion, the right positioning piece 9 is arranged in the second channel 13, a second spring 11 is arranged above the right positioning piece 9, a right limiting protrusion 10 is arranged on the upper end side wall of the right positioning piece 9, and the size of the bottom of the second channel 13 is smaller than that of the right limiting protrusion 10.

[0037] Specifically, during installation, the left positioning piece 8 and the right positioning piece 9 are pressed, and the first spring and the second spring 11 are compressed, and then the left positioning piece 8 and the right positioning piece 9 are loosened, and the left positioning piece 8 and the right positioning piece 9 are moved downward under the elastic force of the compressed first spring and second spring 11, and then clamped with the camera equipment to complete the installation of the support frame. The left limiting protrusion ensures that the left positioning piece 8 will not completely leave the first channel under the action of the first spring. Specifically, the first channel can be a hole with a certain protrusion at the bottom to limit the left limiting protrusion and prevent the left positioning piece 8 from leaving. The principle of the right limiting protrusion 10 is the same as that of the left limiting protrusion 8, and the two can be symmetrically arranged. The structure of the first channel and the second channel 13 can be the same, and the structure of the left positioning piece 8 and the right positioning piece 9 can also be the same, which is convenient for manufacturing and installation. Specifically, the lower shell 12 can be spliced, that is, the first channel and the second channel 13 belong to two splicing pieces. After the first spring, the second spring 11, the left positioning piece 8, and the right positioning piece 9 are placed in the first channel and the second channel 13 on one side, the other side is spliced, and the first spring, the second spring 11, the left positioning piece 8, and the right positioning piece 9 are installed in the first channel and the second channel 13.

[0038] By setting the filter 2, astronomical photography can be used, and the shooting effect is good, the support body 1, the through hole 3 and the support convex 4 can be installed on the filter 2, the filter 2 is installed on the camera equipment through the support frame, and the support frame is installed on the camera equipment through the top convex 7 and the lower positioning assembly.

[0039] The technical scheme of the utility model is described above in combination with specific embodiments, but it should be noted that the above description is only for explaining the scheme of the utility model, and cannot be interpreted as a specific limitation on the protection scope of the utility model in any way. Based on the explanation here, other specific embodiments or equivalent replacements of the utility model that can be thought of by those skilled in the art without creative labor will fall within the protection scope of the utility model.

Claims

1. A filter for astrophotography, characterized in that, The filter (2) has a transmittance of more than 92% at wavelengths of 486.1nm, 494.9nm, 500.7nm, and 656.3nm; it also includes a support frame for supporting the filter (2), the support frame includes a support body (1), the support body (1) is provided with a through hole (3), the inner sidewall of the through hole (3) is provided with a support protrusion (4) for supporting the filter (2), and the size of the filter (2) is smaller than the size of the through hole (3).

2. The filter for astrophotography according to claim 1, characterized in that, The transmittance of the filter (2) is greater than 90% at wavelengths of 475nm to 505nm.

3. The filter for astrophotography according to claim 1, characterized in that, The transmittance of the filter (2) is greater than 90% at wavelengths of 650nm to 660nm.

4. The filter for astrophotography according to claim 1, characterized in that, The left side of the support body (1) is provided with a left protrusion (5), and the right side of the support body (1) is provided with a right protrusion (6).

5. The filter for astrophotography according to claim 4, characterized in that, The top of the bracket body (1) is provided with a top protrusion (7), and the bottom of the bracket body (1) is provided with a lower positioning component.

6. The filter for astrophotography according to claim 5, characterized in that, The lower positioning component includes a lower housing (12), and the lower side of the lower housing (12) is provided with a movable left positioning member (8) and a right positioning member (9).

7. The filter for astrophotography according to claim 6, characterized in that, The lower housing (12) includes a first channel and a second channel (13). The left positioning member (8) is disposed in the first channel. A first spring is provided above the left positioning member (8). A left limiting protrusion is provided on the upper side wall of the left positioning member (8). The bottom of the first channel is smaller than the left limiting protrusion. The right positioning member (9) is disposed in the second channel (13). A second spring (11) is provided above the right positioning member (9). A right limiting protrusion (10) is provided on the upper side wall of the right positioning member (9). The bottom of the second channel (13) is smaller than the right limiting protrusion (10).

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