KR20170010118A - Optic filter having sub-micron structure and method for manufacturing the same - Google Patents
Optic filter having sub-micron structure and method for manufacturing the same Download PDFInfo
- Publication number
- KR20170010118A KR20170010118A KR1020150096806A KR20150096806A KR20170010118A KR 20170010118 A KR20170010118 A KR 20170010118A KR 1020150096806 A KR1020150096806 A KR 1020150096806A KR 20150096806 A KR20150096806 A KR 20150096806A KR 20170010118 A KR20170010118 A KR 20170010118A
- Authority
- KR
- South Korea
- Prior art keywords
- light
- infrared
- optical filter
- absorber
- optical
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 27
- 238000004519 manufacturing process Methods 0.000 title abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 138
- 239000006096 absorbing agent Substances 0.000 claims abstract description 92
- 239000011347 resin Substances 0.000 claims abstract description 51
- 229920005989 resin Polymers 0.000 claims abstract description 51
- 239000011858 nanopowder Substances 0.000 claims abstract description 29
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 31
- 239000011521 glass Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007740 vapor deposition Methods 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims 1
- 238000000016 photochemical curing Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 38
- 239000000203 mixture Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 238000001723 curing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002057 nanoflower Substances 0.000 description 2
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 230000003362 replicative effect Effects 0.000 description 1
- 238000000427 thin-film deposition Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
Abstract
An optical filter having a fine structure and a manufacturing method thereof are disclosed.
This optical filter is characterized in that it includes a light absorbing body made of a photo-curing resin in which a substance absorbing light in the infrared region is dispersed, and a fine structure is formed on both sides of the light absorbing body. Here, the light absorber further includes a dye, and the thickness of the light absorber can be adjusted according to the concentration of the dye. The light absorber further includes a nano powder, and the hardness of the optical filter is controlled by the amount of the nano powder.
Description
The present invention relates to an optical filter having a fine structure and a manufacturing method thereof.
At the optical interface of a typical lens, Fresnel reflection occurs due to refractive index difference. For example, a Fresnel reflection of 4% on one side occurs between a refractive index of air close to 1 and a refractive index of 1.5, which is a refractive index greater than 1. Since a surface of a general lens in contact with air is two-sided, a reflection of a level slightly less than 8% of the total light amount per lens is generated.
In order to prevent the loss of light, MgF 2 is coated as thin as optical thickness to increase the transmittance for a specific wavelength, or to laminate an oxide such as SiO 2 or TiO 2 as thin as optical thickness, thereby increasing the transmittance in a relatively wide wavelength band.
However, the effect of such a thin film is limited to the normal incidence, and the phenomenon of increasing the reflectance can not be prevented when the incident angle is increased. In this case, in the optical module or the optical device composed of the spherical or aspherical lens, problems such as flare and ghost, which are caused by loss of light quantity and reflection of light due to high angle of view can not be avoided.
However, the natural Moth eye not only has a high transmittance for the visible light region but also has a high transmittance for a high incident angle without coating the thin film. The reason for this is known to be due to the structural characteristics of Mossey.
The structural characteristics of Mossey are made up of small protrusions of several hundred nano size. Due to the effect of these protrusions, the specific wavelengths are so small that they can not recognize the structural difference, but the difference in refractive index is changed nonlinearly and continuously and the loss of light is reduced .
There is a need for techniques that complement the disadvantages of conventional optical thin film coatings on lenses using structures similar to those of microstructure.
On the other hand, the sensor used in the camera is composed of cells that absorb wavelength bands having colors of red, green, and blue, and the quantum efficiency of cells that absorb wavelength bands having a red color is distributed over a relatively wide wavelength band have. As a result, a phenomenon occurs in which a red color is expressed by an infrared ray region other than a visible ray.
In order to prevent this, an optical filter, which is an optical filter which increases the transmittance in the wavelength band of visible light and the wavelength band of ultraviolet and infrared light, is used.
However, in such a method, the reflection efficiency in the ultraviolet wavelength band and the infrared wavelength band is high only for the vertically incident light, and the reflection efficiency due to the thin film deposition is remarkably lowered in the wavelength band in which the incident angle is large. As a result, the light in the infrared region outside the visible light wavelength band affects the cells expressing red, resulting in a stronger red color.
To overcome these shortcomings, a blue filter, an optical filter that absorbs infrared rays, has been developed.
However, even in such a blue filter, the formation of a light absorbing layer on a glass substrate has a problem that the manufacturing cost of the blue filter is high and the glass substrate is vulnerable to external impact.
Therefore, there is a need for a method capable of reducing the manufacturing cost of a blue filter and the like, being resistant to external impact, and improving the performance of the blue filter.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to reduce the reflection of Fresnel and improve the transmission efficiency of a visible light region in a wide angle of incidence and to reduce raw material, process time, equipment and manpower, An optical filter having a fine structure capable of reducing cost and a method of manufacturing the optical filter are provided.
According to an aspect of the present invention,
And a light absorber composed of a photo-curing resin in which a material capable of absorbing light in the infrared region is dispersed, and which has a fine structure on both sides of the light absorber.
According to another aspect of the present invention,
An optical absorber made of a photo-curable resin in which a material capable of absorbing light in an infrared region is dispersed; And two films each attached to both surfaces of the light absorber and each having a fine structure on a surface not attached to the light absorber.
Here, the light absorber further includes a dye, and the thickness of the light absorber can be controlled according to the concentration of the dye.
The light absorber further includes a nano powder, and the hardness of the optical filter is controlled by the amount of the nano powder.
In addition, the fine structure may have a morphology, and may have a conical shape with a concave outer surface or a conical shape with a convex outer surface.
According to another aspect of the present invention, there is provided an optical filter comprising:
An optical absorber made of a photo-curable resin in which a material capable of absorbing light in an infrared region is dispersed; And an infrared cut-off filter attached to one surface of the light absorber to block infrared transmission through the light absorber, wherein a fine structure is formed on the other surface of the light absorber.
According to another aspect of the present invention, there is provided an optical filter comprising:
An optical absorber made of a photo-curable resin in which a material capable of absorbing light in an infrared region is dispersed; An infrared cut filter attached to one surface of the light absorber to block infrared transmission through the light absorber; And a film attached to the other surface of the light absorber and having a fine structure on a surface not attached to the light absorber.
Here, the infrared cut filter is a glass substrate having an infrared ray blocking layer formed on a surface thereof not attached to the optical absorber.
The infrared cutoff filter is an infrared cutoff coating film formed by vapor deposition on the optical absorber.
According to another aspect of the present invention, there is provided a method of manufacturing an optical filter,
Injecting a photo-curable resin in which a substance absorbing light in an infrared region is dispersed between two mold films each having a microstructured structure; Curing the photocurable resin by irradiating infrared light from the outside of the two mold films; And mold releasing the two mold films to mold the hardened photocurable resin as an optical filter.
According to another aspect of the present invention, there is provided a method of manufacturing an optical filter,
Forming an infrared ray blocking layer on the glass substrate to produce an infrared ray blocking filter; Injecting a photo-curable resin in which a material capable of absorbing light in the infrared region is dispersed between a mold film on which a fine structure is formed and the infrared cut filter; Curing the photo-curable resin by irradiating infrared light from the mold film and the infrared cutoff filter; And releasing the moldable film and the infrared cutoff filter by using an optical filter.
According to another aspect of the present invention, there is provided a method of manufacturing an optical filter,
Injecting a photo-curable resin in which a material capable of absorbing light in an infrared region is dispersed in a lower portion of a mold film on which a microstructured structure is formed; Curing the photocurable resin by irradiating infrared light from the outside of the mold film; Releasing the photocurable resin by curing the mold film; And depositing an infrared ray blocking coating film on the bottom of the photo-curable resin to form an infrared ray blocking filter.
Here, the photocurable resin further includes a dye used for adjusting the thickness of the optical filter.
The photocurable resin may further include a nano powder used for controlling the hardness of the optical filter.
The mold film may include a mixture of a nano powder and a photo-curable resin in which a material capable of absorbing light in the infrared region is dispersed, on a glass substrate; Uniformly spreading the mixture on the glass substrate using a spin coater; Irradiating infrared light on the mixture to cure the resin; And removing the nano powder by administering a substance capable of removing the nano powder.
The mold film may include a mixture of a nano powder and a photo-curable resin in which a material capable of absorbing light in the infrared region is dispersed, on a glass substrate; Uniformly spreading the mixture on the glass substrate using a spin coater; Irradiating infrared light on the mixture to cure the resin; And replicating the combined shape of the nanoflower and the resin through a replication process on the nanoflower.
Also, the mold film may be formed by processing fine patterns using a mechanical or optical method, and then copying using a material having good releasability.
According to the present invention, the Fresnel reflection is reduced and the transmission efficiency of a better visible light region is increased in a wide incident angle region.
Also, instead of implementing a reflective coating on one side of an optical filter as in the prior art, by forming a fine structure, it is possible to reduce raw materials, reduce processing time, equipment and manpower, There is a number.
In addition, since the substrate is not used, it is possible to reduce the raw material and it is possible to compensate the drawback that the glass material is weak against the external impact due to the adoption of the non-glass resin.
1 is a view schematically showing an optical filter according to a first embodiment of the present invention.
2 is a view schematically showing an optical filter according to a second embodiment of the present invention.
3 is a flowchart of a method of manufacturing the optical filter shown in Fig.
4 is a view schematically showing an optical filter according to a third embodiment of the present invention.
5 is a view schematically showing an optical filter according to a fourth embodiment of the present invention.
6 is a view schematically showing an optical filter according to a fifth embodiment of the present invention.
7 is a view schematically showing an optical filter according to a sixth embodiment of the present invention.
8 is a view schematically showing an optical filter according to a seventh embodiment of the present invention.
9 is a view schematically showing an optical filter according to an eighth embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.
Hereinafter, an optical filter having a fine structure according to the first embodiment of the present invention will be described.
1 is a view schematically showing an
As shown in FIG. 1, the
The region excluding the
Here, the material that absorbs light in the infrared region is composed of a material capable of absorbing the wavelength band of the infrared region not to be transmitted through the
As described above, in the
Also, instead of implementing a reflective coating on one side of an optical filter as in the prior art, by forming a fine structure, it is possible to reduce raw materials, reduce processing time, equipment and manpower, There is a number.
In addition, since the substrate is not used, it is possible to reduce the raw material and it is possible to compensate the drawback that the glass material is weak against the external impact due to the adoption of the non-glass resin.
Such a plurality of effects can provide an optical filter with improved performance and lower unit cost than conventional expensive optical filters.
Next, an optical filter having a fine structure according to a second embodiment of the present invention will be described.
2 is a view schematically showing an
2, the
In the
The
Hereinafter, a method of manufacturing the
3 is a flow chart of a method of manufacturing the
Referring to FIG. 3A, a fine structure corresponding to the
Next, referring to FIG. 3B, the
3 (c), in step S110, UV light is irradiated from the outside of the
3 (d) and 3 (e), when the
The
Next, an optical filter having a fine structure according to a third embodiment of the present invention will be described.
4 is a view schematically showing an
As shown in FIG. 4, the
The region excluding the
The
The
Therefore, the
Next, an optical filter having a fine structure according to a fourth embodiment of the present invention will be described.
5 is a view schematically showing an
As shown in FIG. 5, the
The region excluding the
As in the third embodiment of the present invention, as in the third embodiment of the present invention, in the fourth embodiment, the
The
Therefore, the
Next, an optical filter having a fine structure according to a fifth embodiment of the present invention will be described.
6 is a view schematically showing an
6, the
Each of the
The
In addition, the
When the nano powder is included in the
The
Next, an optical filter having a fine structure according to a sixth embodiment of the present invention will be described.
7 is a view schematically showing an
As shown in FIG. 7, the
Such a
However, the microstructures are formed on the surfaces of the
Next, an optical filter having a fine structure according to a seventh embodiment of the present invention will be described.
8 is a view schematically showing an
8, the
The
The infrared cut-
The
Next, an optical filter having a fine structure according to an eighth embodiment of the present invention will be described.
9 is a view schematically showing an
9, the
The infrared cut-
The
The
The
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.
Claims (18)
Wherein a fine structure is formed on both surfaces of the optical absorber.
Two films each attached to both surfaces of the light absorber and each having a fine structure on a surface not attached to the light absorber,
≪ / RTI >
The light absorber further includes a dye,
The thickness of the light absorber can be adjusted according to the concentration of the dye
Wherein the optical filter comprises:
The light absorber further includes a nano powder,
And adjusting the hardness of the optical filter according to the amount or physical properties of the nano-
Wherein the optical filter comprises:
The fine structure has a morphology,
Wherein the optical filter has a concave conical outer surface or a conical convex outer surface.
And an infrared cut-off filter attached to one surface of the light absorber to block transmission of infrared light through the light absorber,
And a fine structure is formed on the other surface of the optical absorber.
An infrared cut filter attached to one surface of the light absorber to block infrared transmission through the light absorber; And
A film attached to the other surface of the light absorber and having a fine structure on a surface not attached to the light absorber
≪ / RTI >
Wherein the infrared cut filter is a glass substrate on which an infrared blocking layer is formed on a surface not attached to the optical absorber.
Wherein the infrared cutoff filter is an infrared cutoff coating film formed by vapor deposition on the optical absorber.
The light absorber further includes a dye,
The thickness of the light absorber can be adjusted according to the concentration of the dye
Wherein the optical filter comprises:
The light absorber further includes a nano powder,
And adjusting the hardness of the optical filter by the amount of the nano-
Wherein the optical filter comprises:
The fine structure has a morphology,
Wherein the optical filter has a concave conical outer surface or a conical convex outer surface.
Curing the photocurable resin by irradiating infrared light from the outside of the two mold films; And
Releasing the cured photocurable resin with an optical filter by molding the two mold films
≪ / RTI >
Injecting a photo-curable resin in which a material capable of absorbing light in the infrared region is dispersed between a mold film on which a fine structure is formed and the infrared cut filter;
Curing the photo-curable resin by irradiating infrared light from the mold film and the infrared cutoff filter; And
Releasing the molded film and the infrared cutoff filter by releasing the cured photocurable resin with an optical filter
≪ / RTI >
Curing the photocurable resin by irradiating infrared light from the outside of the mold film;
Releasing the photocurable resin by curing the mold film; And
Forming an infrared cutoff filter by depositing an infrared cutoff coating on the bottom of the photo-curable resin
≪ / RTI >
Wherein the photocurable resin further comprises a dye used to adjust the thickness of the optical filter.
Wherein the photocurable resin further comprises a nano powder used to adjust the hardness of the optical filter.
The fine structure has a morphology,
Wherein the outer surface is a concave cone shape or the outer surface is a convex cone shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150096806A KR20170010118A (en) | 2015-07-07 | 2015-07-07 | Optic filter having sub-micron structure and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150096806A KR20170010118A (en) | 2015-07-07 | 2015-07-07 | Optic filter having sub-micron structure and method for manufacturing the same |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020170046948A Division KR20170042276A (en) | 2017-04-11 | 2017-04-11 | Optic filter having sub-micron structure and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20170010118A true KR20170010118A (en) | 2017-01-26 |
Family
ID=57992789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150096806A KR20170010118A (en) | 2015-07-07 | 2015-07-07 | Optic filter having sub-micron structure and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20170010118A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190006655A (en) * | 2017-07-11 | 2019-01-21 | 한국과학기술원 | Method for manufacturing Optical Low Angle Pass Filter for PPG sensor having high SNR and PPG sensor comprising the same |
-
2015
- 2015-07-07 KR KR1020150096806A patent/KR20170010118A/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190006655A (en) * | 2017-07-11 | 2019-01-21 | 한국과학기술원 | Method for manufacturing Optical Low Angle Pass Filter for PPG sensor having high SNR and PPG sensor comprising the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6083925B2 (en) | Substrate with optical structure and optical element using it | |
| US6886937B2 (en) | Ophthalmic lens with graded interference coating | |
| US8270080B2 (en) | Diffractive optical element and method for manufacturing same | |
| US8292430B2 (en) | Tinted semi-finished lens having impact resistance and method for manufacturing the same | |
| JP2012522279A5 (en) | ||
| JP7210076B2 (en) | POLARIZED FILM, POLARIZED FILM FORMING METHOD, AND POLARIZED LENS MANUFACTURING METHOD | |
| CN101354447A (en) | Optical element | |
| US20230146460A1 (en) | Method for forming an optical article comprising microlenses | |
| WO2016145590A1 (en) | Camera module comprising a nir-cut filter and method for producing the same | |
| US8665520B2 (en) | Neutral density optical filter and image pickup apparatus | |
| KR20170042276A (en) | Optic filter having sub-micron structure and method for manufacturing the same | |
| US8154794B2 (en) | Imaging lens and method of manufacturing the same | |
| KR20170010118A (en) | Optic filter having sub-micron structure and method for manufacturing the same | |
| KR101746076B1 (en) | Lens having sub-micron structure and method for manufacturing the same | |
| JP2021531999A (en) | Improved molding equipment for casting and molding optical articles with wafers on top, corresponding methods and optical articles | |
| JP2016071278A (en) | Optical filter and light quantity adjusting device, and imaging apparatus | |
| KR20160123671A (en) | Multi-layered lens and method for manufacturing the same | |
| JP2008139748A (en) | Composite optical element and manufacturing method and equipment therefor | |
| JP2021004929A5 (en) | ||
| KR20170006216A (en) | Method for manufacturing non-reflecting sub-micron structure | |
| CN211718644U (en) | High-refractive-index color-changing lens | |
| KR20060128308A (en) | Lens system with a infrared absorbing glass | |
| KR20190122062A (en) | Manufacturing Method of Polarizing Lens having Photochromic and Ultraviolet Protection Functions | |
| US20240036234A1 (en) | Lens and lens device | |
| US20220155491A1 (en) | Optical Component, Camera Module, Terminal, and Optical Component Processing Method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| AMND | Amendment | ||
| E601 | Decision to refuse application | ||
| AMND | Amendment | ||
| A107 | Divisional application of patent |