CN211826582U - Composite optical structure - Google Patents
Composite optical structure Download PDFInfo
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- CN211826582U CN211826582U CN202020143957.2U CN202020143957U CN211826582U CN 211826582 U CN211826582 U CN 211826582U CN 202020143957 U CN202020143957 U CN 202020143957U CN 211826582 U CN211826582 U CN 211826582U
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Abstract
The utility model discloses a combined type optical structure, it contains: a light-transmitting substrate; a first composite anti-reflection layer formed on the first surface of the light-transmitting substrate; and a second composite antireflection layer formed on a second surface of the light-transmitting substrate opposite to the first surface. The utility model provides a combined type optical structure can increase the light penetration rate to infrared light and visible light.
Description
Technical Field
The utility model relates to a heap optical structure especially relates to a combined type optical structure that can improve infrared light penetration rate.
Background
With the continuous innovation and progress of science and technology, many advanced electronic products, especially the electronic products of Artificial Intelligence (AI) and internet of things (IoT), are designed to integrate various functions such as operation, display, photographing, sensing and control, etc. into one human-machine interface, which is usually a touch panel, so that for the same touch panel, besides basic image display and receiving of user operation gestures, multiple functions such as state sensing, photographing, and control signal reception need to be provided.
In addition to providing sufficient rigidity to protect the display screen, the outer transparent glass window of the touch panel also needs to satisfy more design requirements for optical characteristics, for example, on the same glass window, some regions need to provide high transmittance to visible light as much as possible, but some regions need to reduce transmittance to visible light as much as possible, or another region need only provide high transmittance to infrared light as much as possible, but reduce transmittance to visible light as much as possible to avoid optical interference, while other regions may want to completely shield various light rays, such as visible light, infrared light, or ultraviolet light.
However, the outer transparent glass window structure of the touch panel in the prior art still cannot well satisfy the above requirements in terms of optical characteristics, so based on the above requirements, there is a need to redesign and develop the outer transparent glass window of the touch panel and improve the optical characteristics thereof to satisfy the above requirements, so that no matter the touch panel is a human-machine interface, more functions can be further provided to keep up with various innovative designs of electronic products.
Accordingly, in view of the deficiencies of the prior art, the applicant has made diligent experiments and studies and, in an irreconcilable spirit, finally conceive of the composite optical structure of the present application, which can overcome the above disadvantages of the prior art, and the following is a brief description of the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model provides a combined type optical structure, can be on the same window panel of electronic product, define out a plurality of different functional blocks, and let these functional areas coexist on same window panel, for example, with certain block overall arrangement on the glass window panel all provide high penetrability for visible light and infrared light, when regard as the display area with these blocks, the definition and the quality of multiplicable demonstration image and be difficult for producing the glare, but then there is suitable shading nature at some block, and then the overall arrangement provides high penetrability for the infrared ray specially at some block in addition, with good response and receipt infrared signal, but can strain the visible light simultaneously in order to avoid the maloperation.
The utility model provides a combined type optical structure borrows by forming the stacked structure that IR pierces through printing ink, multilayer anti-reflection coating film and light shield layer etc. and all piles up the compound anti-reflection coating that thickness is greater than for example more than 320nm through the both sides surface at the printing opacity base plate, and provides the penetration rate that reaches more than 94% to the infrared light, and provides the penetration rate that reaches more than 95% or between 2% -5% to visible light selectivity.
Accordingly the utility model provides a combined type optical structure, it contains: a light-transmitting substrate; a first composite anti-reflection layer formed on the first surface of the light-transmitting substrate; and a second composite antireflection layer formed on a second surface of the light-transmitting substrate opposite to the first surface.
Preferably, the composite optical structure further includes: a first infrared light transmission layer between the first surface and the first composite anti-reflection layer; or a second infrared light penetrating layer between the second surface and the second composite anti-reflection layer; a first light shielding layer between the first surface and the first composite antireflection layer; and a second light-shielding layer between the second surface and the second composite anti-reflection layer.
Preferably, in the composite optical structure, the first composite anti-reflection layer has a thickness greater than 320nm, and the second composite anti-reflection layer has a thickness greater than 320 nm.
Preferably, the first composite anti-reflection layer further includes a multi-layer anti-reflection coating formed by repeatedly performing the first coating method, the second composite anti-reflection layer further includes a multi-layer anti-reflection coating formed by repeatedly performing the second coating method, and the first coating method and the second coating method are selected from one of a thermal evaporation process, an ion beam sputtering process, a plasma sputtering process, and an atomic layer deposition process.
Preferably, the first infrared light transmitting layer is formed by performing a first printing method, and the second infrared light transmitting layer is formed by performing a second printing method, the first printing method and the second printing method being one selected from a screen printing method and an inkjet printing method.
Preferably, the composite optical structure provides a transmittance of more than 94% for infrared light and a transmittance of less than 3% for visible light.
Preferably, the composite optical structure provides a transmittance of more than 94% for infrared light and a transmittance of more than 95% for visible light.
Drawings
FIG. 1 is a schematic side-sectional view of a structure illustrating a first embodiment of a composite optical structure according to the present invention;
fig. 2 is a schematic side sectional view of a structure body illustrating a second embodiment of the composite optical structure of the present invention.
Description of reference numerals:
100: the utility model discloses a composite optical structure;
110: a light-transmitting substrate;
111: a first surface;
112: a second surface;
121: a first composite anti-reflection layer;
122: a second composite anti-reflection layer;
131: a first infrared light transmissive layer;
132: a second infrared light transmissive layer;
141: a light-shielding layer;
142: a light-shielding layer;
143: a light-shielding layer;
144: a light-shielding layer;
210: infrared light;
220: visible light;
a: a first region;
b: a second region;
c: a third region;
s1: a first side;
s2: a second side.
Detailed Description
The present invention will be fully understood from the following description of the embodiments, which is provided for by those skilled in the art, but the present invention is not limited to the following embodiments; the utility model discloses an attached drawing does not contain the injecing to size, size and scale, the utility model discloses its size, shape and scale can not be via the utility model discloses an attached drawing is restricted when actually implementing.
The term "preferably" is used herein in a non-exclusive sense, and is to be understood as "preferably but not limited to," and any steps described or recited in any specification or claim may be performed in any order and are not limited to the order described in the claim, and the scope of the present invention should be determined only by the appended claims and their equivalents, and should not be determined by the examples illustrated in the embodiments; the word "comprising" and variations thereof as used herein in the specification and in the claims is an open-ended word without limitation that does not exclude other features or steps.
FIG. 1 is a schematic side-sectional view of a structure illustrating a first embodiment of a composite optical structure according to the present invention; the composite optical structure 100 of the present invention is preferably configured as, for example and without limitation: a window panel, a cover plate or an outer cover of an electronic product, such as a mobile phone, a computer, a television, an instrument panel, a vehicle-mounted display, a center console, a control panel, a touch panel, a human-computer interface, an internet of things (IoT) device, or an Artificial Intelligence (AI) device.
The first embodiment of the composite optical structure 100 of the present invention uses a transparent substrate 110 as a basic carrier, preferably a glass substrate or a PMMA substrate, the transparent substrate 110 has a first surface 111 and a second surface 112 opposite to each other, and can be visible light (visible light) or infrared light (infrared light, IR light), providing a transmittance (transmittance) between 88% -91%, according to Beer-lambertian law, the transmittance is defined as the ratio of incident light (incident light) to transmitted light (transmitted light).
A first composite anti-reflection layer (anti-reflection coating)121 is formed on the first surface 111, the first composite anti-reflection layer 121 preferably has a thickness greater than 320nm, a second composite anti-reflection layer 122 is formed on the second surface 112, and the second composite anti-reflection layer 122 preferably has a thickness greater than 320 nm; the first and second composite antireflection layers 121 and 122 are preferably formed by a coating method (coating scheme), such as but not limited to: a first complex anti-reflection layer 121 and a second complex anti-reflection layer 122 are formed on the first surface 111 and the second surface 112 respectively by thermal evaporation (thermal evaporation), Ion Beam Sputtering (IBS), plasma sputtering (plasma sputtering) or Atomic Layer Deposition (ALD).
The first and second composite antireflection layers 121 and 122 preferably further include a combination of multiple antireflection coatings with different thicknesses and compositions, respectively, to construct an optical interference effect to increase the transmission characteristics of visible light and infrared light, and the transmittances of the first and second composite antireflection layers 121 and 122 to visible light and infrared light depend on the number of layers of the internal antireflection coating, the thickness of each layer, the refractive index of the layer, and the refractive index difference at the interface of the layer, so that the first and second composite antireflection layers 121 and 122 are preferably formed on the first and second surfaces 111 and 112, respectively, by repeatedly performing the above-described coating methods.
Taking the thermal evaporation process as an example, the combination is selected by considering the conditions of maximum interference, minimum interference, refractive index of material, 1/2 wavelength thickness, or 1/4 wavelength thickness, for example but not limited to: high refractive index materials such as titanium oxide (TiO)2Or Ti3O5) Or tantalum oxide (Ta)2O5) Of medium refractive material such as alumina (Al)2O3) Or zirconium oxide (ZrO)2) Low refractive index materials such as silicon oxide (SiO)2) Or magnesium fluoride (MgF)2) The materials are used as targets, and after high temperature ionization (ionized) evaporation, the materials reach the first surface 111 and the second surface 112 from the evaporation source in a high vacuum environment, and are deposited on the first surface 111 and the second surface 112, so as to form high-purity anti-reflection coating films on the first surface 111 and the second surface 112 respectively.
For example, in a set of the first composite antireflection layers 121 composed of three antireflection coating films, after calculation and determination of 1/2 wavelength thickness m and 1/4 wavelength thickness n, a low refractive index magnesium fluoride (MgF) with a refractive index of 1.38 can be selected2) Forming a first anti-reflection coating film with a thickness of m, and selecting high-refractive-index tantalum oxide (Ta) with a refractive index of 2.152O5) Forming a second anti-reflection coating film with a thickness of n, and selecting aluminum oxide (Al) with a refractive index of 1.702O3) A third antireflection coating film with a thickness m is formed, and a first composite antireflection layer 121 is formed on the first surface 111 in combination.
Therefore, the stacked structure is formed by stacking a plurality of optical reflective coatings, the first composite anti-reflection layer 121 and the second composite anti-reflection layer 122 preferably can provide a transmittance of more than 95% for visible light, and can provide a transmittance of more than 94% for infrared light, the visible light refers to a section of electromagnetic wave with a wavelength between 380nm and 760nm on an electromagnetic spectrum (electromagnetic spectrum), and belongs to electromagnetic fluctuation visible to human eyes, the infrared light is preferably near infrared light (NIR), and refers to a section of electromagnetic wave with a wavelength between 700nm and 1400nm on the electromagnetic spectrum, and belongs to electromagnetic fluctuation invisible to human eyes, and the stacked structure is commonly applied to infrared remote control (IR remote control) technology; after the first composite anti-reflection layer 121 and the second composite anti-reflection layer 122 are formed on the first surface 111 and the second surface 112, respectively, the composite optical structure 100 of the present invention can provide a transmittance greater than 94% for the infrared light 210 and a transmittance greater than 95% for the visible light 220 within the range of the first area a.
The composite optical structure 100 of the present invention may further optionally include an infrared light transmissive layer selectively disposed between the first surface 111 of the transparent substrate 110 and the first composite anti-reflection layer 121, or between the second surface 112 and the second composite anti-reflection layer 122; in this embodiment, for example, but not limited to, a second infrared light transmissive layer 132 is further formed on the second surface 112 between the second surface 112 and the second composite anti-reflection layer 122, and a first infrared light transmissive layer (not shown in this embodiment) is also formed on the first surface 111 between the first surface 111 and the first composite anti-reflection layer 121.
The second infrared light transmitting layer 132 is preferably formed by a printing method (printing scheme), such as but not limited to: the second infrared light transmitting layer 132 is printed on the second surface 112 by screen printing or inkjet printing, and is used to allow infrared light, especially near infrared light, to pass through but block visible light and ultraviolet light having a wavelength less than that of the near infrared light.
When only a single layer of the second infrared light transmissive layer 132 is disposed, the single layer of the second infrared light transmissive layer 132 can provide a maximum transmittance of 89% for infrared light, but when a layer of the second composite anti-reflection layer 122 is further formed on the second infrared light transmissive layer 132, the transmittance of infrared light can be increased to 94% by disposing the second infrared light transmissive layer 132 and the second composite anti-reflection layer 122 together, while visible light can be filtered out, and the second infrared light transmissive layer 132 can only provide a transmittance of 2% -5% for visible light.
After second infrared light penetrating layer 132, and second composite antireflection layer 122 disposed thereon form on second surface 112, the utility model discloses combined type optical structure 100 can provide the penetration rate that is greater than more than 94% for infrared light 210 in the scope of second region B, but can shield visible light 220 simultaneously, only provides the penetration rate that is about between 2% -5% for visible light 220, works as the utility model discloses combined type optical structure 100 when using in infrared remote control technique, just can effectively filter the visible light, avoids infrared remote control to receive the interference of visible light and produces the maloperation.
In order to shield the IR sensing devices and circuit structures disposed under the second IR transmissive layer 132, the IR transmissive ink contained in the second IR transmissive layer 132 is preferably black in color and is preferably disposed near the edge of the overall structure of the composite optical structure 100.
The composite optical structure 100 of the present invention further includes a light shielding layer 141 selectively disposed between the first surface 111 and the first composite anti-reflection layer 121, or selectively disposed between the second surface 112 and the second composite anti-reflection layer 122, and the first composite anti-reflection layer 121 or the second composite anti-reflection layer 122 is used as the outermost layer of the composite optical structure 100, under this configuration, the light shielding layer 141 can be directly disposed on the first surface 111 or the second surface 121, or directly disposed on the second infrared light transmission layer 132, for example, but not limited to, in this embodiment, the light shielding layer 141 is further formed between the second surface 112 and the second composite anti-reflection layer 122, and directly on the second infrared light transmission layer 132.
The light-shielding layer 141 is preferably formed by a printing method (printing scheme), such as, but not limited to: screen printing (screen printing) or inkjet printing (inkjet printing) are used in combination with the light-shielding ink to be printed on the second infrared light transmission layer 132, the light-shielding layer 141 is used to block all visible light and infrared light, and provides 0% of transmittance for visible light and infrared light, and after the light-shielding layer 141 is configured, the composite optical structure 100 can block all visible light and infrared light within the range of the third area C, and provides 0% of transmittance for visible light and infrared light.
In this embodiment, it is also possible to selectively interpose between the second surface 112 and the second composite anti-reflection layer 122 and directly on the second surface 112, further form the light shielding layer 142 and the light shielding layer 143 by a printing method, and by configuring a plurality of light shielding layers 141, 142 and 143, it is possible to define a plurality of mutually independent operation regions for the composite optical structure 100, and it is possible to provide different penetration rates for visible light and infrared light, and provide more different functions and design changes for the device in which the composite optical structure 100 is installed.
For example, the composite optical structure 100 of the present invention can provide a transmittance greater than 94% for the infrared light 210 in the first area a, and provide a transmittance greater than 95% for the visible light 220, provide a transmittance greater than 94% for the infrared light 210 in the second area B, but can shield the visible light 220, only provide a transmittance between 2% and 5% for the visible light 220, block all visible light and infrared light in the third area C, and provide a transmittance of 0% for the visible light and infrared light; the first area a can thus preferably be designed as, for example but not limited to: the second region B may be designed as, for example, but not limited to, an image display region, a touch operation region, an image sensing region, an external photographing region, or a control region based on visible light sensing, etc.: the infrared remote control area is used for receiving infrared control signals, or the infrared sensing area is used for sensing infrared trigger signals, and the third area C can be designed as, for example and without limitation: the frame area, the element structure shielding area or the decoration area can meet the requirement that the same window panel of the electronic product needs to have a plurality of different functional blocks.
In the embodiment, since only one first composite anti-reflection layer 121 is formed on the first surface 111, and the second infrared light transmissive layer 132, the light-shielding layer 141, the light-shielding layer 142, and the light-shielding layer 143 are all selectively disposed on the second surface 112, the first surface 111 and the first composite anti-reflection layer 121 are substantially flat; when the utility model discloses combined type optical structure 100 uses as the window panel of electronic product, the preferred can be with first compound anti-reflection coating 121 design for outer component, and towards the first side S1 that the user is located, with second compound anti-reflection coating 122 design for the inlayer component, and towards the inside second side S2 of product, when the user watches or operates the window panel from first side S1, can show an approximate smooth surface, help promoting the pleasing to the eye and the roughness of the whole outward appearance of window panel, also promote user experience simultaneously (usereexperiences).
In summary, the present invention provides a composite optical structure, which comprises a stacked structure of IR-penetrating ink, multi-layer anti-reflection coating and light shielding layer, such as but not limited to stacking a composite anti-reflection layer with a thickness greater than 320nm, providing a penetration rate of more than 94% to infrared light on a transparent substrate, and providing a penetration rate of more than 95% or between 2% -5% to visible light selectivity, and by using such an optical structure, the combined optical structure can be implemented on the same transparent glass window cover plate, with respect to having various different penetration rate changes, and can increase more different functional designs and changes for new-technology electronic products.
FIG. 2 is a schematic side-sectional view of a structure illustrating a second embodiment of a composite optical structure according to the present invention; the second embodiment of the composite optical structure 200 of the present invention includes all the technical features of the first embodiment, in this embodiment, the first infrared light penetrating layer 131 and the one light shielding layer 144 are selectively disposed between the first surface 111 and the first composite anti-reflection layer 121, and the first composite anti-reflection layer 121 is used as the outermost layer of the composite optical structure 100, so the light shielding layer 144 is selectively and directly formed on the first surface 111, the first infrared light penetrating layer 131 is formed on the first surface 111 and the light shielding layer 144, and according to the selection of different processes and the actual construction requirements of the electronic product, the first infrared light penetrating layer 131 does not necessarily need to cover on the light shielding layer 144. It is noted that, according to the selection of different processes and the actual structural requirements of the electronic product, the first infrared light transmissive layer 131 may be formed directly on the first surface 111, and the light shielding layer 144 is formed on the first infrared light transmissive layer 131.
The utility model discloses combined type optical structure 200 can provide the penetration rate that is greater than more than 94% for infrared light 210 in first region A to for visible light 220 provides the penetration rate that is greater than more than 95%, provide the penetration rate that is greater than more than 94% for infrared light 210 in second region B, but can shelter from visible light 220 simultaneously, only provide the penetration rate that approximately is between 2% -5% for visible light 220, block all visible light and infrared light at third region C, provide 0% penetration rate for visible light and infrared light.
When the composite optical structure 200 of the present invention is applied as a window panel of an electronic product, the first composite anti-reflection layer 121 and the second composite anti-reflection layer 122 are not limited to be an outer layer member or an inner layer member, and the first composite anti-reflection layer 121 and the second composite anti-reflection layer 122 are both suitable for being an outer layer member or an inner layer member, or both the outer layer member and the inner layer member, or vice versa, so as to adapt to various possible innovative functions and design changes of various electronic products in the future.
The utility model provides a combined type optical structure, borrow by forming IR and pierce through printing ink, the stacked structure of multilayer anti-reflection coating film and light shield layer etc, for example but not limited to pile up out the compound anti-reflection coating that thickness is greater than 320nm, can provide the penetration rate that reaches more than 94% to the infrared light on the printing opacity base plate, and provide the penetration rate that reaches more than 95% or between 2% -5% to visible light selectivity, utilize such optical structure, realize on same a piece of transparent glass window apron, just possess the penetration rate change of various differences, can let the electronic product of new science and technology can increase more different functional design and change.
The utility model provides a combined type optical structure can define out the different functional area of polylith for the window panel of electronic product, for example, make certain region on the glass window panel all provide high penetrability to visible light and infrared light, when regard as the display area with these regions, can increase the definition of the image that shows and be difficult for producing glare etc. but some regions have appropriate shading nature, and some other regions can provide high penetrability for the infrared ray specially, with good response and received infrared remote control signal, but can filter out the visible light simultaneously and avoid the maloperation with the maximum possibility, and let above-mentioned different functional area coexist on a glass window panel; by applying such a composite optical structure, various possible innovative functions and design changes of various more intelligent electronic products in the future can be better supported.
Further more embodiments of the present invention are provided:
example 1: a composite optical structure, comprising: a light-transmitting substrate; a first composite anti-reflection layer formed on the first surface of the light-transmitting substrate; and a second composite antireflection layer formed on a second surface of the light-transmitting substrate opposite to the first surface.
Example 2: the composite optical structure of embodiment 1, further comprising one of: a first infrared light transmission layer between the first surface and the first composite anti-reflection layer; the second infrared light penetrating layer is arranged between the second surface and the second composite anti-reflection layer; a first light shielding layer between the first surface and the first composite antireflection layer; and a second light-shielding layer between the second surface and the second composite anti-reflection layer.
Example 3: the composite optical structure of embodiment 1, wherein the first composite anti-reflective layer has a thickness greater than 320nm and the second composite anti-reflective layer has a thickness greater than 320 nm.
Example 4: the composite optical structure as claimed in embodiment 1, wherein the first composite anti-reflective layer further comprises a plurality of anti-reflective coatings formed by repeatedly performing a first coating process, and the second composite anti-reflective layer further comprises a plurality of anti-reflective coatings formed by repeatedly performing a second coating process, wherein the first coating process and the second coating process are selected from one of a thermal evaporation process, an ion beam sputtering process, a plasma sputtering process, and an atomic layer deposition process.
Example 5: the composite optical structure as defined in embodiment 2 wherein the first ir transmissive layer is formed by applying a first printing method and the second ir transmissive layer is formed by applying a second printing method, the first and second printing methods being selected from one of screen printing and inkjet printing.
Example 6: the composite optical structure of embodiment 2, wherein the first infrared light transmissive layer or the second infrared light transmissive layer provides a transmittance of 89% at most for infrared light.
Example 7: the composite optical structure of embodiment 2, providing greater than 94% transmittance for infrared light and less than 3% transmittance for visible light.
Example 8: the composite optical structure of embodiment 1, providing greater than 94% transmittance for infrared light and greater than 95% transmittance for visible light.
Example 9: the composite optical structure of embodiment 1, wherein the transparent substrate is selected from a PMMA substrate and a glass substrate, and provides a transmittance of 88% -91% for infrared light or visible light.
Example 10: the composite optical structure of embodiments 6, 7, 8 or 9, wherein the infrared light has an electromagnetic wavelength in a range of 700nm to 1,400nm and the visible light has an electromagnetic wavelength in a range of 380nm to 760 nm.
The embodiments of the present invention can be combined or replaced at will, and thus more embodiments can be derived, but the scope of the present invention is not to be excluded, the scope of the present invention is defined, and the right is to be read by the right of the claims of the present invention.
Claims (10)
1. A composite optical structure, comprising:
a light-transmitting substrate;
a first composite anti-reflection layer formed on the first surface of the light-transmitting substrate; and
and the second composite anti-reflection layer is formed on a second surface, opposite to the first surface, of the light-transmitting substrate.
2. The composite optical structure of claim 1, further comprising one of:
the first infrared light penetrating layer is arranged between the first surface and the first composite anti-reflection layer;
the second infrared light penetrating layer is arranged between the second surface and the second composite anti-reflection layer;
a first light-shielding layer between the first surface and the first composite antireflection layer; and
and the second light shielding layer is arranged between the second surface and the second composite antireflection layer.
3. The composite optical structure of claim 1, wherein the first composite anti-reflection layer has a thickness greater than 320nm and the second composite anti-reflection layer has a thickness greater than 320 nm.
4. The composite optical structure of claim 1, wherein the first antireflection layer further comprises a plurality of antireflection coatings formed by repeating the first coating process a plurality of times, and the second antireflection layer further comprises a plurality of antireflection coatings formed by repeating the second coating process a plurality of times, wherein the first and second coating processes are selected from one of a thermal evaporation process, an ion beam sputtering process, a plasma sputtering process, and an atomic layer deposition process.
5. The composite optical structure of claim 2, wherein the first infrared light transmissive layer is formed by performing a first printing process, and the second infrared light transmissive layer is formed by performing a second printing process, the first and second printing processes being selected from one of screen printing and inkjet printing.
6. The composite optical structure of claim 2, wherein the first infrared light transmissive layer or the second infrared light transmissive layer provides a transmittance of at most 89% for infrared light.
7. The composite optical structure of claim 2 providing greater than 94% transmission for infrared light and less than 3% transmission for visible light.
8. The composite optical structure of claim 1 providing greater than 94% transmission for infrared light and greater than 95% transmission for visible light.
9. The composite optical structure of claim 1, wherein the light-transmissive substrate is selected from one of a PMMA substrate and a glass substrate, and provides between 88% and 91% transmittance for infrared light or visible light.
10. The composite optical structure of any one of claims 7-9 wherein the infrared light has an electromagnetic wavelength in the range of 700nm to 1,400nm and the visible light has an electromagnetic wavelength in the range of 380nm to 760 nm.
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|---|---|---|---|
| CN202020143957.2U CN211826582U (en) | 2020-01-22 | 2020-01-22 | Composite optical structure |
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|---|---|---|---|
| CN202020143957.2U CN211826582U (en) | 2020-01-22 | 2020-01-22 | Composite optical structure |
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