CN210347980U - A Radiant Gradient Anti-Light Pollution Filter for Astrophotography - Google Patents
A Radiant Gradient Anti-Light Pollution Filter for Astrophotography Download PDFInfo
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- CN210347980U CN210347980U CN201921513486.3U CN201921513486U CN210347980U CN 210347980 U CN210347980 U CN 210347980U CN 201921513486 U CN201921513486 U CN 201921513486U CN 210347980 U CN210347980 U CN 210347980U
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- 230000003287 optical effect Effects 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 27
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 5
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 5
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 5
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 239000005304 optical glass Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000011109 contamination Methods 0.000 claims 9
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 212
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- 230000005540 biological transmission Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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Abstract
本实用新型涉及一种用于天文摄影的放射型渐变式抗光污染滤光镜，属于光学过滤技术领域，本滤光镜包括基片、第一滤光层、第二滤光层、第三滤光层、第四滤光层和第五滤光层，所述第一滤光层盖设在所述基片的上表面，所述第二滤光层盖设在所述第一滤光层的上表面，所述第三滤光层盖设在所述第二滤光层的上表面，所述第四滤光层盖设在所述第三滤光层的上表面，所述第五滤光层盖设在所述第四滤光层的上表面，所述第一滤光层、所述第二滤光层、所述第三滤光层、所述第四滤光层和所述第五滤光层内的膜层密度均由一侧向另一侧逐渐减小。本实用新型效果是通过设置的多级滤光层，使得滤光强度逐渐减小，能够有效避免产生地面景物色偏的现象。
The utility model relates to a radiation type gradient type anti-light pollution filter used for astrophotography, belonging to the technical field of optical filtering. The filter comprises a substrate, a first filter layer, a second filter layer and a third filter layer. an optical layer, a fourth optical filter layer and a fifth optical filter layer, the first optical filter layer is covered on the upper surface of the substrate, and the second optical filter layer is covered on the first optical filter layer The upper surface of the third filter layer is covered on the upper surface of the second filter layer, the fourth filter layer is covered on the upper surface of the third filter layer, and the fifth filter layer is covered on the upper surface of the third filter layer. The filter layer is covered on the upper surface of the fourth filter layer, the first filter layer, the second filter layer, the third filter layer, the fourth filter layer and the The film density in the fifth filter layer gradually decreases from one side to the other side. The effect of the utility model is that the multi-level filter layer is arranged so that the filter intensity is gradually reduced, which can effectively avoid the phenomenon of color shift of the ground scene.
Description
Technical Field
The utility model belongs to the technical field of the optics filters, concretely relates to radiation type gradual change formula anti light pollution optical filter for astronomical photography.
Background
The photographic filter is a glass or plastic lens which is placed at the front end or the rear end of a camera lens during photographing and can selectively absorb or reflect different wave bands of light.
Among them, the most commonly used optical filter for astronomy photography is anti-light pollution, but the current optical filter on the market is an integral filter, which can cause color cast of ground scenery, thereby reducing the imaging quality.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem and provide a radial type gradual change formula anti light pollution optical filter for astronomical photography for the multistage filter layer that sets up for filtering intensity reduces gradually, can effectively avoid producing the phenomenon of ground scenery colour cast.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a radial gradual change formula anti light pollution optical filter for astronomical photography, includes substrate, first filter layer, second filter layer, third filter layer, fourth filter layer and fifth filter layer, first filter layer lid is established the upper surface of substrate, the second filter layer lid is established the upper surface of first filter layer, the third filter layer lid is established the upper surface of second filter layer, the fourth filter layer lid is established the upper surface of third filter layer, the fifth filter layer lid is established the upper surface of fourth filter layer, first filter layer the second filter layer the third filter layer the fourth filter layer with the intraformational rete density of fifth filter layer reduces by a side to opposite side gradually.
The utility model has the advantages that: through the first filter layer, the second filter layer, the third filter layer, fourth filter layer and the fifth filter layer that set up for the light wave filters through the fifth filter layer earlier, and pass through the fourth filter layer in proper order again, the third filter layer, second filter layer and first filter layer are filtered step by step, and simultaneously first filter layer, the second filter layer, the third filter layer, the rete density of fourth filter layer and fifth filter layer reduces from left to right gradually, forms the gradual change effect, thereby can effectively avoid the phenomenon because of the ground scenery colour cast that the light filter leads to, avoid the formation of image quality to reduce.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
And the filter further comprises a protective film layer which is covered on the fifth filter layer.
The beneficial effect of adopting the further scheme is that: the outermost fifth filter layer of optical filter can be protected, and the damage of scratching of the fifth filter layer is avoided.
And the substrate is far away from the side surface of the first filter layer.
The beneficial effect of adopting the further scheme is that: the formation of ghost and flare can be prevented.
Further, the first optical filter layer filters light waves with the wavelength of 435mm, the thickness of the first optical filter layer is 327mm, the first optical filter layer is composed of three first low-refractive-index layers and three first high-refractive-index layers which are alternately arranged at intervals, and the thicknesses of the first low-refractive-index layers and the first high-refractive-index layers are 54.5 mm.
The beneficial effect of adopting the further scheme is that: light waves with a wavelength of 435mm can be filtered out.
Further, the second filter layer filters light waves with the wavelength of 546mm, the thickness of the second filter layer is 410mm, the second filter layer is composed of three second low-refractive-index layers and three second high-refractive-index layers which are alternately arranged at intervals, and the thicknesses of the second low-refractive-index layers and the second high-refractive-index layers are 68.3 mm.
The beneficial effect of adopting the further scheme is that: light waves with a wavelength of 546mm can be filtered out.
Further, the third filter layer filters the light wave with the wavelength of 578mm, the thickness of the third filter layer is 433mm, the third filter layer is composed of three third low refractive index layers and three third high refractive index layers which are alternately arranged at intervals, and the thicknesses of the third low refractive index layers and the third high refractive index layers are 72.2 mm.
The beneficial effect of adopting the further scheme is that: light waves with a wavelength of 578mm can be filtered out.
Further, the fourth filter layer filters the lightwave that wavelength is 595mm, the thickness of fourth filter layer is 446mm, the fourth filter layer comprises three layers of fourth low refracting index layer and three layers of fourth high refracting index layer that alternate interval set up, the thickness of fourth low refracting index layer with fourth high refracting index layer is 74.4 mm.
The beneficial effect of adopting the further scheme is that: can filter out the light wave with the wavelength of 595 mm.
Further, the fifth filter layer filters light waves with the wavelength of 616mm, the thickness of the fifth filter layer is 462mm, the fifth filter layer is composed of three fifth low refractive index layers and three fifth high refractive index layers which are alternately arranged at intervals, and the thicknesses of the fifth low refractive index layers and the fifth high refractive index layers are 77 mm.
The beneficial effect of adopting the further scheme is that: light waves with a wavelength of 616mm can be filtered out.
Further, the first low refractive index layer, the second low refractive index layer, the third low refractive index layer, the fourth low refractive index layer and the fifth low refractive index layer are made of silicon dioxide or magnesium fluoride, and the first high refractive index layer, the second high refractive index layer, the third high refractive index layer, the fourth high refractive index layer and the fifth high refractive index layer are made of one of zirconium dioxide, titanium dioxide or zinc oxide.
The beneficial effect of adopting the further scheme is that: the filtering effect is better.
Further, the substrate is an optical glass substrate or an optical resin substrate.
The beneficial effect of adopting the further scheme is that: is beneficial to light transmission.
Drawings
Fig. 1 is a front view of the gradual change type light pollution resistant filter of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the light-emitting diode comprises a substrate, 2, a first filter layer, 3, a second filter layer, 4, a third filter layer, 5, a fourth filter layer, 6, a fifth filter layer, 7, a protective film layer and 8, and an anti-reflection film layer.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Examples
As shown in fig. 1, the present invention provides a radiation-type gradual-change filter for astronomical photography, which comprises a substrate 1, a first filter layer 2, a second filter layer 3, a third filter layer 4, a fourth filter layer 5 and a fifth filter layer 6, wherein the substrate 1 is horizontally arranged, the first filter layer 2 covers the upper surface of the substrate 1, the second filter layer 3 covers the upper surface of the first filter layer 2, the third filter layer 4 covers the upper surface of the second filter layer 3, the fourth filter layer 5 covers the upper surface of the third filter layer 4, and the fifth filter layer 6 covers the upper surface of the fourth filter layer 5. Wherein the substrate 1 is at the bottom, and first filter layer 2, second filter layer 3, third filter layer 4, fourth filter layer 5 and fifth filter layer 6 pile up the setting in proper order, and the rete density in first filter layer 2, second filter layer 3, third filter layer 4, fourth filter layer 5 and fifth filter layer 6 all reduces from left to right gradually. The reduction directions of the film densities of the first filter layer 2, the second filter layer 3, the third filter layer 4, the fourth filter layer 5 and the fifth filter layer 6 are the same, wherein the film densities refer to the densities of the respective substances of the filter layers, so that the light transmittance of the side, with the high density, of the first filter layer 2, the second filter layer 3, the third filter layer 4, the fourth filter layer 5 and the fifth filter layer 6 is 0-10%, and the light transmittance of the side, with the low density, is 90-100%. Light firstly irradiates the fifth filter layer 6, enters the fourth filter layer 5 after being filtered, then passes through the third filter layer 4, the second filter layer 3 and the first filter layer 2 in sequence, is filtered, then is transmitted and penetrates through the substrate 1, and the filtering strength is gradually weakened through the arrangement of the plurality of filter layers, so that the color cast problem of a ground scene is corrected.
Preferably, the optical filter further includes a protection film layer 7 in this embodiment, the protection film layer 7 covers the fifth filter layer 6, and the outermost fifth filter layer 6 is protected by the protection film layer 7, so that the optical filtering effect is prevented from being affected after the fifth filter layer 6 is scratched. Wherein the protective film layer 7 is coated on the surface of the fifth optical filter layer 6 by a coating machine, wherein the protective film layer 7 is a zirconium dioxide coating film.
Preferably, still include anti-reflection of light rete 8 in this embodiment, anti-reflection of light rete 8 lid is established on substrate 1 keeps away from the side of first filter layer 2, and wherein anti-reflection of light rete 8 plates on substrate 1's surface through the coating machine, can prevent ghost and the formation of dazzling light through the anti-reflection of light rete 8 that sets up. Wherein the anti-reflection film layer 8 is a composite coating film of magnesium fluoride and titanium dioxide.
Specifically, in the present embodiment, the first filter layer 2 filters light waves with a wavelength of 435mm, the thickness of the first filter layer 2 is 327mm, the first filter layer 2 is composed of three first low refractive index layers and three first high refractive index layers alternately arranged at intervals, and the thicknesses of the first low refractive index layers and the first high refractive index layers are 54.5 mm. There were 3 first low refractive index layers and 3 first high refractive index layers in total. Light waves with a wavelength of 435mm are mainly filtered out by the first optical filter layer 2.
Specifically, in the present embodiment, the second filter layer 3 filters light waves with a wavelength of 546mm, the thickness of the second filter layer 3 is 410mm, the second filter layer 3 is composed of three second low refractive index layers and three second high refractive index layers alternately arranged at intervals, and the thicknesses of the second low refractive index layers and the second high refractive index layers are 68.3 mm. There were 3 second low refractive index layers and 3 second high refractive index layers in total. Light waves with a wavelength of 546mm are mainly filtered out by the second filter layer 3.
Specifically, in the present embodiment, third filter layer 4 filters light wave with a wavelength of 578mm, the thickness of third filter layer 4 is 433mm, third filter layer 4 is composed of three third low refractive index layers and three third high refractive index layers alternately arranged at intervals, and the thicknesses of the third low refractive index layers and the third high refractive index layers are 72.2 mm. There are 3 third low refractive index layers and 3 third high refractive index layers. Light waves with a wavelength of 578mm are mainly filtered out by the third optical filter layer 4.
Specifically, in the present embodiment, the fourth filter layer 5 filters light waves with a wavelength of 595mm, the thickness of the fourth filter layer 5 is 446mm, the fourth filter layer 5 is composed of three fourth low refractive index layers and three fourth high refractive index layers alternately arranged at intervals, and the thicknesses of the fourth low refractive index layers and the fourth high refractive index layers are 74.4 mm. There are 3 fourth low refractive index layers and 3 fourth high refractive index layers. The light wave with a wavelength of 595mm is mainly filtered out by the fourth filter layer 5.
Specifically, in the present embodiment, the fifth filter layer 6 filters light having a wavelength of 616mm, the thickness of the fifth filter layer 6 is 462mm, the fifth filter layer 6 is composed of three fifth low refractive index layers and three fifth high refractive index layers alternately arranged at intervals, and the thickness of the fifth low refractive index layers and the thickness of the fifth high refractive index layers are 77 mm. There are 3 fifth low refractive index layers and 3 fifth high refractive index layers in total. A light wave with a wavelength of 616mm is mainly filtered out by the fifth filter layer 6.
Specifically, in this embodiment, the first low refractive index layer, the second low refractive index layer, the third low refractive index layer, the fourth low refractive index layer, and the fifth low refractive index layer are made of silicon dioxide or magnesium fluoride, and the first high refractive index layer, the second high refractive index layer, the third high refractive index layer, the fourth high refractive index layer, and the fifth high refractive index layer are made of one of zirconium dioxide, titanium dioxide, or zinc oxide.
Specifically, the substrate 1 in this embodiment is an optical glass substrate or an optical resin substrate.
The filter lens can be coated by adopting a coating machine, wherein the substrate 1 is placed in the coating machine, the target material to be coated is placed in the coating machine, the target material is coated on the substrate 1 by the coating machine to obtain a gradually-changed coating layer structure, wherein the target material is silicon dioxide, magnesium fluoride, zirconium dioxide, titanium dioxide and zinc oxide, and the gradually-changed anti-light pollution filter lens is obtained by alternately coating.
The principle of the filter is as follows: through setting up the high refracting index layer and the low refracting index layer of different thickness for the light wave of different wavelength refracts between the high refracting index layer and the low refracting index layer that correspond, absorbs the back through the refraction, thereby the filter layer of different thickness filters the light wave of different wavelengths, passes through the filter layer of multistage setting simultaneously, makes filtering strength weaken gradually, thereby revises the colour cast problem of ground scenery.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A radial gradual change type optical pollution resistant filter for astronomical photography, comprising a substrate (1), a first filter layer (2), a second filter layer (3), a third filter layer (4), a fourth filter layer (5) and a fifth filter layer (6), wherein the first filter layer (2) is covered on the upper surface of the substrate (1), the second filter layer (3) is covered on the upper surface of the first filter layer (2), the third filter layer (4) is covered on the upper surface of the second filter layer (3), the fourth filter layer (5) is covered on the upper surface of the third filter layer (4), the fifth filter layer (6) is covered on the upper surface of the fourth filter layer (5), the first filter layer (2), the second filter layer (3), the third filter layer (4), the fourth filter layer (5) and the film layer in the fifth filter layer (6) are all formed by one side to the other side in density Gradually decreases.
2. The radiation-type graded light-contamination-resistant filter lens for astronomy photography according to claim 1, further comprising a protective film layer (7), wherein the protective film layer (7) is covered on the fifth optical filter layer (6).
3. A radiation-type graded light-contamination-resistant filter for astronomy photography according to claim 1, further comprising an anti-reflection film layer (8), wherein the anti-reflection film layer (8) is disposed on the side of the substrate (1) away from the first optical filter layer (2).
4. The radiation-type graded anti-light-contamination filter for astronomy photography according to claim 1, wherein the first optical filter layer (2) filters light having a wavelength of 435mm, the first optical filter layer (2) has a thickness of 327mm, the first optical filter layer (2) is composed of three first low refractive index layers and three first high refractive index layers alternately disposed at intervals, and the first low refractive index layers and the first high refractive index layers have a thickness of 54.5 mm.
5. The radiation-type graded anti-light-contamination filter for astronomy photography according to claim 4, wherein the second optical filter layer (3) filters light having a wavelength of 546mm, the second optical filter layer (3) has a thickness of 410mm, the second optical filter layer (3) is composed of three second low refractive index layers and three second high refractive index layers alternately arranged at intervals, and the second low refractive index layers and the second high refractive index layers have a thickness of 68.3 mm.
6. The radiation-type graded anti-light-contamination filter for astronomy photography according to claim 5, wherein the third optical filter layer (4) filters light having a wavelength of 578mm, the third optical filter layer (4) has a thickness of 433mm, the third optical filter layer (4) is composed of three third low refractive index layers and three third high refractive index layers alternately arranged at intervals, and the third low refractive index layers and the third high refractive index layers have a thickness of 72.2 mm.
7. The radiation-type graded anti-light-contamination filter for astronomy photography according to claim 6, wherein the fourth optical filter layer (5) filters light having a wavelength of 595mm, the fourth optical filter layer (5) has a thickness of 446mm, the fourth optical filter layer (5) is composed of three fourth low refractive index layers and three fourth high refractive index layers alternately arranged at intervals, and the thickness of the fourth low refractive index layers and the fourth high refractive index layers is 74.4 mm.
8. The radiation-type graded anti-light-contamination filter for astronomy photography according to claim 7, wherein the fifth optical filter layer (6) filters light having a wavelength of 616mm, the thickness of the fifth optical filter layer (6) is 462mm, the fifth optical filter layer (6) is composed of three fifth low refractive index layers and three fifth high refractive index layers alternately disposed at intervals, and the thickness of the fifth low refractive index layers and the fifth high refractive index layers is 77 mm.
9. The radiation type graded anti-light-contamination filter lens for astronomy photography according to claim 8, wherein the first low refractive index layer, the second low refractive index layer, the third low refractive index layer, the fourth low refractive index layer and the fifth low refractive index layer are made of silicon dioxide or magnesium fluoride, and the first high refractive index layer, the second high refractive index layer, the third high refractive index layer, the fourth high refractive index layer and the fifth high refractive index layer are made of one of zirconium dioxide, titanium dioxide or zinc oxide.
10. The radiation-type graded anti-light-contamination filter lens for astronomy photography according to any one of claims 1 to 9, wherein the substrate (1) is an optical glass substrate or an optical resin substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921513486.3U CN210347980U (en) | 2019-09-11 | 2019-09-11 | A Radiant Gradient Anti-Light Pollution Filter for Astrophotography |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921513486.3U CN210347980U (en) | 2019-09-11 | 2019-09-11 | A Radiant Gradient Anti-Light Pollution Filter for Astrophotography |
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| CN210347980U true CN210347980U (en) | 2020-04-17 |
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| CN201921513486.3U Expired - Fee Related CN210347980U (en) | 2019-09-11 | 2019-09-11 | A Radiant Gradient Anti-Light Pollution Filter for Astrophotography |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568537A (en) * | 2019-09-11 | 2019-12-13 | 贵州民族大学 | A Radial Gradient Anti-Light Pollution Filter for Astrophotography |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568537A (en) * | 2019-09-11 | 2019-12-13 | 贵州民族大学 | A Radial Gradient Anti-Light Pollution Filter for Astrophotography |
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