CN217587590U - Composite optical protective sheet and laser radar - Google Patents
Composite optical protective sheet and laser radar Download PDFInfo
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- CN217587590U CN217587590U CN202220245508.8U CN202220245508U CN217587590U CN 217587590 U CN217587590 U CN 217587590U CN 202220245508 U CN202220245508 U CN 202220245508U CN 217587590 U CN217587590 U CN 217587590U
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Abstract
The utility model provides a compound optics protection piece and laser radar. This compound optical protection piece includes first substrate, infrared transmission layer, the second substrate, AR rete and ultraviolet subtract the layer, first substrate and second substrate are range upon range of respectively and are set up on the both sides surface that infrared transmission layer is relative, infrared transmission layer is for having sticky polymer rete, first substrate and second substrate bond in infrared transmission layer, the AR rete can see through the infrared light, the AR rete sets up on a side surface that infrared transmission layer was kept away from to first substrate, the ultraviolet subtracts the layer and sets up on a side surface that infrared transmission layer was kept away from to the second substrate, the ultraviolet subtracts the layer and is used for reducing the transmissivity of ultraviolet light. The composite optical protection sheet has excellent impact resistance and explosion-proof performance, and the protection effect is improved.
Description
Technical Field
The utility model belongs to the technical field of the optics window technique and specifically relates to a compound optics protection piece and laser radar are related to.
Background
The laser radar is a radar system that detects a characteristic quantity such as a position, a speed, and the like of an object by emitting a laser beam. The working principle is to transmit a detection signal to a target, then receive a signal reflected from the target and compare the signal with the transmitted signal to obtain information about the target, such as target distance, orientation, speed and even shape. Compared with common sensors such as a camera and a millimeter wave radar, the laser radar has the advantage that the laser radar has strong space three-dimensional resolution capability, and is gradually applied to vehicles.
The lidar detector is susceptible to damage when exposed to the external environment, affecting its normal function, and therefore generally needs to be protected. To protect the lidar, a lidar optical protective sheet may be mounted on the exposed face of the lidar. Such an optical protective sheet is required not only to have a high impact resistance but also to have as little influence as possible on the outgoing and incoming of laser light. Conventional optical protective sheets for laser radars are usually prepared by plating AR antireflection films, black films or black PC sheets on substrates such as glass or sapphire, etc. to meet different light transmission requirements and protect the laser radars. However, such optical protective sheets still have a problem of low protective strength.
SUMMERY OF THE UTILITY MODEL
In order to improve the impact resistance of the laser radar optical protection sheet, it is necessary to provide a composite optical protection sheet and, correspondingly, a laser radar.
According to an embodiment of the utility model, a compound optics protection piece, it includes first substrate, infrared transmission layer, second substrate, AR rete and ultraviolet subduct layer, first substrate with the second substrate respectively range upon range of set up in on the surface of the relative both sides in infrared transmission layer, the AR rete set up in first substrate is kept away from one side of infrared transmission layer is on the surface, the ultraviolet subducts the layer set up in the second substrate is kept away from one side of infrared transmission layer is on the surface, the ultraviolet subducts the layer and is used for reducing the transmissivity of ultraviolet ray.
In one embodiment, the thickness of the infrared transmission layer is 0.05mm to 3mm.
In one embodiment, the infrared transmission layer has a transmittance of 86% or more for infrared light having a wavelength of 880nm to 940nm and/or 1100nm to 1700 nm.
In one embodiment, the infrared transmissive layer also functions to reduce the transmission of visible light.
In one embodiment, the infrared transmission layer has a transmittance of 80% or less for visible light having a wavelength of 400nm to 650 nm.
In one embodiment, the ultraviolet-absorbing layer further comprises an anti-fingerprint layer, and the anti-fingerprint layer is arranged on one side surface of the ultraviolet-absorbing layer far away from the second substrate.
In one embodiment, the infrared transmission layer further comprises a transparent conductive layer, and the transparent conductive layer is arranged on the surface of the first substrate and/or the surface of the second substrate, which is adhered to the infrared transmission layer.
In one embodiment, the light transmittance of the ultraviolet reducing layer to ultraviolet light with the wavelength of less than or equal to 400nm is less than 80%, and the light transmittance of the ultraviolet reducing layer to infrared light with the wavelength of 860nm to 1600nm is more than 86%.
In one embodiment, the AR film layer is selected from a black AR film layer or a silver AR film layer.
In one embodiment, the first substrate has a thickness of 0.3mm to 5mm, and/or
The thickness of the second substrate is 1 mm-8 mm.
Further, a laser radar comprises a laser detection functional body and the composite optical protection sheet according to any one of the embodiments, wherein the composite optical protection sheet is used for protecting the laser detection functional body.
The first substrate and the second substrate are arranged in the composite optical protection sheet at the same time, the protection capability of the composite optical protection sheet can be enhanced due to the arrangement of the two layers of substrates, and even if one layer of substrate is damaged, the second layer of substrate still can play a certain protection role. Meanwhile, the first substrate and the second substrate are bonded by the infrared transmission layer, and even if a certain substrate is broken, the substrate cannot be scattered to cause damage to other components. However, the introduction of the infrared transmission layer can cause the optical performance of the composite optical protection sheet to be deteriorated and affect the long-term application characteristics, so that the ultraviolet attenuation layer positioned on the surface of the second substrate on the side far away from the infrared transmission layer is also arranged in the composite optical protection sheet, the ultraviolet light entering the composite optical protection sheet is reduced, the aging of the infrared transmission layer taking the polymer as the base material is slowed down, and the service life of the infrared transmission layer is prolonged.
In some embodiments, the infrared transmission layer can be arranged to reduce the transmittance of visible light under the condition of transmitting infrared light, so that the infrared transmission layer can also replace a black film in the traditional technology, and further, the process of plating the black film can be saved in the preparation process of the composite optical protection sheet, and the production cost is reduced.
In some preferred embodiments, the product can conveniently present different appearance effects through the color adjustment of the inner and outer plating layers and the infrared transmission layer, and the visual performance of the product is further enriched.
Drawings
FIG. 1 shows a schematic structural view of a composite optical protection sheet;
wherein the reference symbols and their meanings are as follows:
100. an infrared transmissive layer; 110. a first substrate; 111. an AR film layer; 112. a transparent conductive layer; 120. a second substrate; 121. an ultraviolet reducing layer; 122. an anti-fingerprint layer.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the following embodiments and effect drawings. The preferred embodiments of the present invention have been described. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be connected through two or more elements. It should be understood that it is a matter of course that those skilled in the art can correspondingly understand the specific meanings of the above terms according to specific situations without causing ambiguity.
Unless otherwise defined, in the description of the present invention, terms indicating orientation or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings of the present invention, which are only for convenience and simplicity in describing the contents of the present invention, and help the reader understand the drawings, not for defining or implying a specific orientation that the referred device or element must have, and thus should not be interpreted as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model provides a compound optics protection piece, it includes first substrate, infrared transmission layer, second substrate, AR rete and ultraviolet subduct layer, first substrate with the second substrate range upon range of respectively set up in on the surface of the relative both sides in infrared transmission layer, infrared transmission layer is for having viscidity polymer rete, first substrate with the second substrate bond in infrared transmission layer, the AR rete set up in first substrate is kept away from one side of infrared transmission layer is on the surface, the ultraviolet subduct the layer set up in the second substrate is kept away from one side of infrared transmission layer is on the surface, the ultraviolet subducts the layer and is used for reducing the transmissivity of ultraviolet ray.
The first substrate and the second substrate are arranged in the composite optical protection sheet at the same time, the protection capability of the composite optical protection sheet can be enhanced due to the arrangement of the two layers of substrates, and even if one layer of substrate is damaged, the second layer of substrate still can play a certain protection role. Meanwhile, the first substrate and the second substrate are bonded by the infrared transmission layer, and even if a certain substrate is broken, the substrate cannot be scattered to cause damage to other components. However, the introduction of the infrared transmission layer can cause the rapid deterioration of the optical performance of the composite optical protection sheet, so that the ultraviolet attenuation layer positioned on the surface of the second substrate on the side far away from the infrared transmission layer is also arranged in the composite optical protection sheet, the ultraviolet light entering the composite optical protection sheet is reduced, the aging of the infrared transmission layer taking the polymer as the base material is slowed down, and the service life of the infrared transmission layer is prolonged.
Meanwhile, the infrared transmission layer can be arranged to reduce the transmittance of visible light under the condition of transmitting infrared light, so that the black film in the traditional technology can be replaced, the process of plating the black film can be saved in the preparation process of the composite optical protection sheet, and the production cost is reduced.
FIG. 1 shows an embodiment of one of the above-described composite optical protective sheets. To facilitate understanding of the specific structure, please refer to fig. 1, the composite optical protection sheet includes a first substrate 110, an infrared transmission layer 100, a second substrate 120, an AR film layer 111, and an ultraviolet reduction layer 121, wherein the first substrate 110 and the second substrate 120 are respectively stacked on two opposite side surfaces of the infrared transmission layer 100, the AR film layer 111 is disposed on one side surface of the first substrate 110 away from the infrared transmission layer 100, and the ultraviolet reduction layer 121 is disposed on one side surface of the second substrate 120 away from the infrared transmission layer 100. The first substrate 110 and the second substrate 120 are arranged in the composite optical protection sheet at the same time, the arrangement of the two substrates can enhance the protection capability of the composite optical protection sheet, and even if the second substrate 120 is damaged, the first substrate 110 can still play a certain protection role. Therefore, the composite optical protection sheet has better impact resistance.
Wherein the infrared transmission layer 100 is an adhesive polymer film layer, and the first substrate 110 and the second substrate 120 are adhered to the infrared transmission layer 100. It is understood that the first substrate 110 and the second substrate 120 are bonded to each other with the infrared-transmitting layer 100, and even if the first substrate 110 is broken, they will not be scattered to cause damage to other components. Therefore, the composite optical protection sheet also has excellent explosion-proof performance. Optionally, the substrate of the infrared transmission layer 100 is an optical adhesive, and the specific material of the optical adhesive may be one or more selected from an ultraviolet light curing adhesive, an a-B adhesive, a thermosetting adhesive, a silica gel, an acrylate adhesive, an ether ester adhesive, an epoxy resin adhesive, and a PVB adhesive.
The thickness of the infrared transmitting layer 100 may be 0.01mm to 5mm, but it is considered that the thickness of the infrared transmitting layer 100 has some influence on the incidence and emission of laser light. In order to ensure the firm adhesion between the first substrate 110 and the second substrate 120 without substantially affecting the incidence and emission of the laser, in one specific example, the thickness of the infrared transmission layer 100 is 0.05mm to 3mm. Optionally, the thickness of the infrared transmission layer 100 is 0.1mm to 2mm; further optionally, the infrared transmitting layer 100 has a thickness of 0.5mm to 1mm.
In one specific example, the infrared transmission layer 100 has a transmittance of 86% or more for infrared light having a wavelength of 880nm to 940nm and/or 1100nm to 1700 nm. It can be understood that the specific transmission performance of the infrared transmission layer 100 for light rays of different wavelength bands can be adjusted by selecting the type and specific amount of the light-transmitting material added to the infrared transmission layer 100, and the infrared transmission layer 100 may have a transmittance of 86% or more for only infrared light of 880nm to 940nm, or 86% or more for only infrared light of 1100nm to 1700nm, or 86% or more for infrared light of 880nm to 940nm and 1100nm to 1700 nm. Optionally, the infrared transmission layer 100 has a transmittance of 90% or more for infrared light having a wavelength of 880nm to 940nm and/or 1100nm to 1700 nm.
It is understood that in order to achieve selective permeability to infrared rays, a material capable of selectively transmitting infrared rays may be added to the substrate of the infrared-transmitting layer 100. Further, in one specific example, the infrared transmitting layer 100 is also used to reduce the transmittance of visible light, and specifically, a material capable of selectively transmitting infrared rays and reducing the transmittance of visible light, such as an organic metal complex and/or a phthalocyanine-based pigment, may be added to the substrate of the infrared transmitting layer 100.
In one specific example, the infrared transmission layer 100 has a transmittance of 80% or less for visible light having a wavelength of 400nm to 650 nm; optionally, the infrared transmission layer 100 has a transmittance of 5% or less for visible light having a wavelength of 400nm to 650 nm. The infrared transmission layer 100 can reduce the transmittance of visible light while transmitting infrared light, so that the infrared transmission layer 100 can replace a black film commonly used in the prior art, simplify a coating process, and reduce the production cost of the composite optical protection sheet while blocking visible light.
In one specific example, the composite optical protection sheet further comprises an anti-fingerprint layer 122, wherein the anti-fingerprint layer 122 is arranged on one side surface of the ultraviolet reduction layer 121 far away from the second substrate 120. The side of the second substrate 120 away from the infrared transmission layer 100 is an outer surface facing the outside, and an anti-fingerprint layer 122 is disposed to reduce dirt adhering to the surface of the composite optical protection sheet, so as to prevent the signal of the laser radar from being interfered.
In one specific example, the composite optical protection sheet further comprises a transparent conductive layer 112, wherein the transparent conductive layer 112 is disposed on the surface of the first substrate 110 and/or the second substrate 120 adhered to the infrared transmission layer 100. It is understood that the transparent conductive layer 112 may have one or two layers, and fig. 1 shows that the transparent conductive layer 112 is disposed only on the surface of the first pole piece 110. The transparent conductive layer 112 may be a complete plating layer plated on the surface of the first substrate 110, the plating material may be a transparent conductive material such as ITO, and the transparent conductive layer 112 may also be a circle of conductive traces adhered to the area of the surface of the first substrate 110 near the edge.
It is understood that the AR film 111 may be an opaque AR film or a transparent AR film. Further, the AR film 111 may be selected from a black AR film, a silver AR film, a colored AR film, or a colorless AR film, and the colored AR film may be colored in blue, red, yellow, or the like. In order to impart more abundant performance to the composite optical protective sheet, in one specific example, the AR film layer 111 is selected from a black infrared-transmitting AR film layer 111 capable of transmitting infrared light, or a silver infrared-transmitting AR film layer 111 capable of transmitting infrared light, or a colored AR film layer 111 capable of transmitting infrared light. When the AR film layer 111 is selected from a black infrared-transmissive AR film layer 111, the composite optical protection sheet is capable of transmitting infrared light but not visible light, and the structure of the specific device inside the composite optical protection sheet is not visible to the user from the outside, and the light interference effect is reduced. When the AR film layer 111 is selected from a silver infrared transmitting AR film layer 111, the composite optical protective sheet is capable of transmitting infrared light but has a high reflection effect on visible light to form a mirror surface effect in combination with the infrared transmitting layer 100 having a transmittance of more than 30%, and thus the composite optical protective sheet can also be used as a rear view mirror having an infrared detection function for an automobile.
The AR film 111 is disposed on a surface of the first substrate 110 away from the infrared transmission layer 100. The AR film layer 111 may include a first high refractive index layer and a first low refractive index layer, the total number of the first high refractive index layer and the first low refractive index layer is more than three, and the first high refractive index layer and the first low refractive index layer are alternately stacked. The material of the first high refractive index layer is selected from one or more of silicon hydride, silicon nitride, silicon oxynitride, titanium oxide and zirconium oxide, and the material of the first low refractive index layer is selected from one or more of silicon dioxide, silicon monoxide and aluminum oxide. It is understood that the skilled person can realize selective transmission of light rays with different wavelength bands by specific selection and thickness matching of the materials of the first high refractive index layer and the first low refractive index layer.
The ultraviolet reducing layer 121 is disposed on a surface of the second substrate 120 on a side away from the infrared transmission layer 100, and the ultraviolet reducing layer 121 is used for reducing transmittance of ultraviolet light. In one specific example, the transmittance of the ultraviolet reducing layer 121 to ultraviolet light with a wavelength of 400nm or less is 80% or less, and the transmittance of the ultraviolet reducing layer 121 to infrared light with a wavelength of 860nm to 1600nm is 86% or more. After the infrared transmission layer 100 is introduced, the optical durability of the composite optical protection sheet is easily affected by ultraviolet to be weakened and changed, so that an ultraviolet weakening layer 121 positioned on the surface of one side, far away from the infrared transmission layer 100, of the second substrate 120 is further arranged in the composite optical protection sheet, ultraviolet light entering the composite optical protection sheet is reduced, the aging of the infrared transmission layer 100 taking a polymer as a base material is slowed down, the property of a selective light-transmitting material in the infrared transmission layer 100 is kept unchanged, the structure of the infrared transmission layer 100 is kept unchanged, and the service life of the composite optical protection sheet is prolonged. Furthermore, the light transmittance of the ultraviolet reducing layer 121 to ultraviolet light with a wavelength of 400nm or less is below 30%, and the light transmittance of the ultraviolet reducing layer 121 to infrared light with a wavelength of 860nm to 1600nm is above 90%.
In one specific example, the ultraviolet absorption layer 121 may be selected from AR plating layers capable of absorbing ultraviolet transmittance. The AR coating has a high transmittance to infrared light and a low transmittance to ultraviolet light. The AR coating may include a second high refractive index layer and a second low refractive index layer, the total number of the second high refractive index layer and the second low refractive index layer is three or more, and the second high refractive index layer and the second low refractive index layer are alternately stacked. The material of the second high refractive index layer is selected from one or more of silicon nitride, silicon oxynitride, titanium oxide, zirconium oxide and tantalum oxide, and the material of the second low refractive index layer is selected from one or more of silicon dioxide, silicon monoxide, silicon oxynitride and aluminum oxide. It can be understood that the skilled person can realize selective transmission of light rays with different wavelength bands and high hardness and wear resistance characteristics by specific selection and thickness matching of the materials of the second high refractive index layer and the second low refractive index layer.
The first substrate 110 may be a glass substrate, a quartz substrate, a sapphire substrate, or a transparent ceramic substrate, and the second substrate 120 may be a glass substrate, a quartz substrate, a sapphire substrate, or a transparent ceramic substrate. Optionally, the first substrate 110 and the second substrate 120 are both glass substrates. Further optionally, the glass substrate is subjected to ion exchange treatment, specifically, the preheated glass substrate is placed in potassium nitrate molten salt for ion exchange, the temperature of the potassium nitrate molten salt is 420 ℃, and the treatment time is 6 hours.
In order to improve the transmittance of the composite optical protective sheet to light as much as possible while maintaining the strength of the composite optical protective sheet, the first substrate 110 has a thickness of 0.3mm to 5mm, and the second substrate 120 has a thickness of 1mm to 8mm. Alternatively, the first substrate 110 may have a thickness of 0.5mm to 3mm, and the second substrate 120 may have a thickness of 2mm to 8mm. Further alternatively, the thickness of the first substrate 110 is 1mm to 2mm, and the thickness of the second substrate 120 is 3mm to 7mm.
Further, another embodiment of the present invention provides a laser radar, which includes a laser detection functional body and a composite optical protection sheet as shown in fig. 1, wherein the composite optical protection sheet is used for protecting the laser detection functional body.
It should be understood that the above-mentioned embodiment is only one of the better feasible ways of the present invention, in which the size, position, shape, etc. of each component are all used to realize the technical idea of the present invention and perform corresponding setting, but not limited to the above-mentioned embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. The utility model provides a compound optics protection piece, its characterized in that includes first substrate, infrared transmission layer, second substrate, AR rete and ultraviolet subduct layer, first substrate with the second substrate respectively range upon range of set up in on the surface of the relative both sides in infrared transmission layer, infrared transmission layer is for having sticky polymer rete, first substrate with the second substrate bond in infrared transmission layer, the AR rete can see through the infrared light, the AR rete set up in the first substrate is kept away from on one side surface in infrared transmission layer, the ultraviolet subduct layer set up in the second substrate is kept away from on one side surface in infrared transmission layer, the ultraviolet subducts the layer and is used for reducing the transmissivity of ultraviolet ray.
2. The composite optical protective sheet of claim 1, wherein the infrared transmissive layer has a thickness of 0.05mm to 3mm.
3. The composite optical protective sheet according to claim 2, wherein the infrared transmissive layer has a transmittance of at least 86% for infrared light having a wavelength of 880nm to 940nm and/or 1100nm to 1700 nm.
4. The composite optical protective sheet according to claim 1, wherein the infrared transmissive layer has a transmittance of 80% or less for visible light having a wavelength of 400nm to 650 nm.
5. The composite optical protection sheet according to any one of claims 1 to 4, further comprising an anti-fingerprint layer disposed on a surface of the UV-reducing layer on a side thereof remote from the second substrate; and/or
The infrared transmission layer is arranged on the surface of the first substrate and/or the second substrate, and the transparent conducting layer is adhered to the surface of the infrared transmission layer.
6. The composite optical protective sheet according to any one of claims 1 to 4, wherein the ultraviolet light transmittance of the ultraviolet light reducing layer for ultraviolet light having a wavelength of 400nm or less is 80% or less, and the ultraviolet light transmittance of the ultraviolet light reducing layer for infrared light having a wavelength of 860nm to 1600nm is 86% or more.
7. The composite optical protective sheet according to any one of claims 1 to 4, wherein the AR film layer is selected from a black AR film layer, a silver AR film layer, or a colored AR film layer.
8. Composite optical protection sheet according to any one of claims 1 to 4, characterized in that the thickness of said first substrate is between 0.3mm and 5mm, and/or
The thickness of the second substrate is 1 mm-8 mm.
9. A lidar comprising a photodetection functional body and the composite optical protective sheet according to any one of claims 1 to 8, wherein the composite optical protective sheet is used for protecting the photodetection functional body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220245508.8U CN217587590U (en) | 2022-01-28 | 2022-01-28 | Composite optical protective sheet and laser radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220245508.8U CN217587590U (en) | 2022-01-28 | 2022-01-28 | Composite optical protective sheet and laser radar |
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| Publication Number | Publication Date |
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| CN217587590U true CN217587590U (en) | 2022-10-14 |
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| CN202220245508.8U Active CN217587590U (en) | 2022-01-28 | 2022-01-28 | Composite optical protective sheet and laser radar |
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Address after: 437300 Zhonghuo Optical Valley Industrial Park, Chibi Economic Development Zone, Xianning City, Hubei Province Patentee after: Weidali Technology Co.,Ltd. Patentee after: Wanjin Industrial (Chibi) Co.,Ltd. Patentee after: SUTENG INNOVATION TECHNOLOGY Co.,Ltd. Address before: 437300 Zhonghuo Optical Valley Industrial Park, Chibi Economic Development Zone, Xianning City, Hubei Province Patentee before: WEIDALI INDUSTRY (CHIBI) CO.,LTD. Patentee before: Wanjin Industrial (Chibi) Co.,Ltd. Patentee before: SUTENG INNOVATION TECHNOLOGY Co.,Ltd. |
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