CN215494293U - Optical window - Google Patents

Abstract

The utility model provides an optical window, comprising: the film comprises a film, an optical transparent adhesive layer (OCA) and a transparent window, wherein the optical transparent adhesive layer is positioned between the film and the transparent window, and the film is attached to the surface of the transparent window through the optical transparent adhesive layer. The film is attached to the surface of the transparent window through the OCA glue layer, so that the overall blackening effect and the explosion-proof function of the appearance of the optical window can be realized. And the production cost can be reduced by more than half, and the method has the advantages of simple process, good mass production and high production safety.

Description

Optical window

Technical Field

The utility model relates to the field of optical devices, in particular to an optical window.

Background

In recent years, various light receiving and emitting devices and equipment such as cameras, laser ranging devices, infrared detection devices, optical sensors and the like are widely used, and in application, the devices and equipment can not be safely and effectively used without a corresponding optical window, so that the process and the application of the optical window are continuously developed.

Wherein, along with the constantly development of intelligent driving, laser radar (Lidar) is the indispensable core component in the future intelligent driving, consequently, people are also promoting constantly to the requirement of laser radar optics window: firstly, on the basis of safety consideration, the laser radar glass optical window has to realize an explosion-proof function; secondly, the radar optic window must be black based on aesthetic requirements.

The existing radar glass window generally meets the requirements of blackening and explosion prevention after a black coating film is coated on white glass (ultra-white glass) and PVB (polyvinyl butyral) are laminated. It has some disadvantages as follows: (1) and the cost is high: firstly, the yield of the glass black coating is low, which leads to the increase of the cost of single glass; secondly, two pieces of glass are needed for pressing, and the cost is high. (2) And poor versatility: the PVB pressing scheme can only be applied to a plane glass window, and cannot be used for pressing on a curved glass window. (3) The existing glue-sandwiching process of the plane glass is multi-purpose in high-temperature pressing, and high-temperature conditions are needed in the process, so that the production efficiency is low; on the other hand, the laminating process of curved glass all adopts vacuum bag processing, however, the existing vacuum bag used for the process has the following disadvantages: the manufacturing process is complex, the production efficiency is low, the cost is high, the cleaning is not easy, the reuse rate of the vacuum bag is low, and the air leakage is easy to happen in the processes of vacuumizing and heating.

SUMMERY OF THE UTILITY MODEL

The present invention provides an optical viewing window that solves, or at least partially solves, the above-mentioned problems of the prior art.

The present invention provides an optical window, comprising: the film comprises a film, an optical transparent adhesive layer and a transparent window, wherein the optical transparent adhesive layer is positioned between the transparent window and the film, and the film is attached to the surface of the transparent window through the optical transparent adhesive layer.

In some embodiments, the film is a black film.

In some embodiments, the film is a black resin film.

In some embodiments, the transparent window is made of glass.

In some embodiments, the transparent window is a planar window.

In some embodiments, the transparent window is a curved window.

In some embodiments, the film has a thickness in the range of 0.015mm to 0.5 mm.

In some embodiments, the optical transparent adhesive layer is attached to the surface of the transparent window by rolling an adhesive film.

In some embodiments, the film is attached to the side of the optical transparent adhesive layer away from the transparent window by rolling the adhesive film.

In some embodiments, the film is attached to an inner surface of the transparent window through the optically transparent adhesive layer, where the inner surface is a surface of the transparent window away from an external environment in application.

In some embodiments, a first antireflection film is disposed on a surface of the transparent window on a side away from the film.

In some embodiments, a waterproof film is further disposed on a surface of the first antireflection film on a side away from the transparent window.

In some embodiments, a second antireflection film is disposed on a surface of the film on a side away from the transparent window.

According to at least one embodiment of the present invention, the optical window obtained by attaching the film to the surface of the transparent window through the optical transparent adhesive layer can achieve the overall blackening effect and the explosion-proof function of the appearance of the optical window, and has at least one of the following beneficial effects: the overall cost can be reduced by more than half, for example, from 268 yuan/pcs to 110 yuan/pcs; the sticking of different curved surfaces can be realized, so that the explosion-proof function of the curved surface outer cover is realized, the process is simple, and the mass production is good; the blocking capability of the optical window product to visible light can make the product black and more beautiful; the optical window has better infrared light transmission performance while realizing explosion prevention and impact resistance; the product has better transmittance and lower haze (picture granular sensation), and can improve the transmittance of the optical window and further improve the precision of the laser radar. In addition, compared with the prior art, the sticking film provided by the utility model has the following special advantages on plane and curved surface windows in explosion prevention: (1) the process is simple, the production efficiency is high, and the cost is low; (2) the jig can be repeatedly used; (3) the process does not need high temperature, and the safety to the staff is higher.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings. Wherein:

FIG. 1 is a schematic view of a planar optical viewing window according to one embodiment of the present invention;

FIG. 2 is a schematic view of a curved optical window according to one embodiment of the present invention; and

FIG. 3 is a schematic view of an optical window fabrication process route according to an embodiment of the present invention.

Detailed Description

For a better understanding of the present invention, various aspects of the present invention will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the utility model and is not intended to limit the scope of the utility model in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any one of the items listed in relation and any combination of any two or more. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the utility model. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.

Use of the word "may" with respect to an example or embodiment (e.g., with respect to what an example or embodiment may include or implement) means that there is at least one example or embodiment that includes or implements such a feature, and all examples or embodiments are not limited thereto.

It should be noted that in the present description, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not indicate any limitation on the features, and do not particularly indicate any precedence order. For example, a first antireflective film may also be referred to herein as a second antireflective film and a second antireflective film may also be referred to herein as a first antireflective film without departing from the teachings of the present invention.

In the drawings, the thickness, size, and shape of each component may have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

Throughout the specification, when an element is described as being "on," "connected to" or "coupled to" another element, for example, it can be directly on, "connected to" or "coupled to" the other element, or one or more other elements may be present between the element and the other element. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there may be no other elements intervening between the element and the other element.

Spatially relative terms, such as "above … …," "upper," "below … …," and "lower," may be used herein for ease of description to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be "below" or "lower" relative to the other elements. Thus, the phrase "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears in the list of listed features, that statement modifies all features in the list rather than merely individual elements in the list.

As used herein, the terms "approximately," "about," "substantially," and the like are used as words of table approximation and not as words of table degree, and are intended to account for inherent deviations in measured or calculated values that can be appreciated by one of ordinary skill in the art.

Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a planar optical viewing window according to one embodiment of the present invention. Next, the optical window 100 and its components according to the embodiment of the present invention will be described in detail with reference to fig. 1.

As shown in fig. 1, an optical window 100 according to an embodiment of the present invention may include a film 101, an Optical Clear Adhesive (OCA) layer 102, and a transparent window 103. The optical transparent adhesive layer 102 is located between the film 101 and the transparent window 103, and the film 101 is attached to the surface of the transparent window 103 through the optical transparent adhesive layer 102.

The optical window 100 may in particular be used as an optical window for a lidar, for example. The film 101 may be a black film. The film 101 may have characteristics such as high permeability and high toughness.

The film 101 may be a black resin film, and the film 101 may have characteristics such as high permeability and high toughness. In addition, the visible light blocking capability of the resin film can make the optical window 100 black as a whole, so that the product is more beautiful.

The OCA glue layer 102 is used for gluing the film 101 and the transparent window 103, and OCA (optical Clear adhesive) is commonly used for gluing transparent optical elements, has the characteristics of colorless transparency, high light transmittance, good gluing strength and the like, can be cured at room temperature or at intermediate temperature, and has the characteristics of small curing shrinkage and the like. Resin film and OCA glue film have high toughness, possess great shock-resistant ability for optics window 100 can pass through car rule rubble impact test. And, the high viscosity of OCA glue film can realize optical window 100 explosion-proof function. Compared with the glass and PVB (polyvinyl butyral) laminating scheme in the prior art, the overall cost can be reduced by more than half because the resin film and the OCA glue layer are cheaper than the glass, and can be reduced from 268 yuan/pcs to 110 yuan/pcs according to the specific implementation mode. Furthermore, compared with PVB generally adopted in the prior art, the OCA adhesive layer has better transmittance and lower haze (picture graininess), and can improve the transmittance of the optical window, thereby being beneficial to further improving the use precision of laser radars and the like in application.

In some embodiments according to the present invention, the material of the transparent window 103 may be glass. For example, the transparent window 103 may be made of white glass (ultra-white glass), which has wide application in industrial products, good reliability and low reflectivity.

In some other embodiments according to the utility model, the transparent window 103 may be made of other suitable materials. For example, the transparent window 103 may be made of plastic, and further, the transparent window 103 may be made of plastic with an impact-resistant hard film attached thereto, so as to achieve the impact-resistant performance required in the specific application environment.

In some embodiments according to the utility model, the transparent window 103 may be a planar window, as shown in FIG. 1, suitable for use in, for example, application scenarios where a planar form optical window is desired.

In some other embodiments according to the present invention, the transparent window 103 may also be a curved window, for example, for applications or devices that require a curved surface. Fig. 2 is a schematic view of a curved optical window according to an embodiment of the present invention. As can be seen, the film 101 can be bent into the same curved shape as the transparent window 103 to achieve a good fit.

The thickness of the membrane 101 may be selected, for example, in the range of 0.015mm to 0.5 mm. As mentioned above, the film 101 may be a black resin film, and the resin film may be bent at will at a thickness of 0.015mm to 0.5mm, so that the adhesion of different curved surfaces may be achieved, and thus, the explosion-proof function of the optical windows with different curved surfaces may be achieved. And the process is simple and the mass production is good.

In some embodiments according to the present invention, the OCA adhesive layer 102 may be attached to the surface of the transparent window 103 by rolling a film. For example, the OCA layer 102 and the surface of the transparent window 103 may be roll-bonded by a roller.

In some embodiments according to the present invention, the film 101 may be attached to the OCA glue layer 102 on the side away from the transparent window 103 by rolling the film. That is, the film 101 may be attached to the surface of the transparent window 103 by the OCA adhesive layer 102 by rolling the adhesive film. For example, on the basis of roll bonding the surfaces of the OCA layer 102 and the transparent window 103 by a roller, the film 101 and the OCA layer 102 may be similarly roll bonded by a roller, so that the film 101 is attached to the surface of the transparent window 103 by the OCA layer 102.

In some embodiments according to the utility model, the film 101 may be attached to the inner surface of the transparent window 103 by an OCA glue layer 102, and the inner surface may be the surface of the transparent window 103 on the side away from the external environment 200 in application. In contrast, the surface of the transparent window 103 contacting the external environment 200 in the application may be an outer surface thereof, and S1 shown in fig. 1 is an outer surface of the transparent window 103, which is directly exposed to the external environment 200. As mentioned above, the inner surface of the transparent window 103 may be further attached with the film 101 through the OCA glue layer 102, and in the specific application of the optical window 100, devices or components such as laser radar may be disposed on one side of the film 101 of the optical window 100.

Further, in some embodiments according to the disclosure, a surface of the transparent window 103 on a side away from the film 101 may be provided with a first antireflection film. That is, the outer surface S1 of the transparent window 103 may be provided with a first antireflection film (not shown). The arrangement of the first antireflection film can further improve the overall infrared transmittance of the optical window 100, thereby being more beneficial to ensuring the use effect and precision of equipment such as laser radar. Specifically, the outer surface S1 of the transparent window 103 may be coated with a first anti-reflection film by, for example, vacuum evaporation coating. However, it will be understood by those skilled in the art that the specific manner of plating the first antireflection film is not limited thereto.

Further, in some embodiments according to the disclosure, a waterproof film (not shown) may be further disposed on a surface of the first antireflection film on a side away from the transparent window 103. The waterproof film can improve the waterproof performance of the optical window 100, and is also favorable for ensuring the use effect and the precision of equipment such as laser radar under different application environments. Specifically, the outer surface S1 of the transparent window 103 may be further coated with a water-repellent film on the basis of the first antireflection film, for example, by vacuum evaporation coating. However, it will be understood by those skilled in the art that the specific manner of applying the waterproof film is not limited thereto.

In some other embodiments according to the disclosure, a second antireflection film (not shown) may be further disposed on a surface of the film 101 of the optical window 100 away from the transparent window 103. That is, as shown in FIG. 1, a second antireflection film may be provided on the S2 side of film 101. The arrangement of the second antireflection film can further improve the overall infrared transmittance of the optical window 100, thereby being more beneficial to ensuring the use effect and precision of equipment such as laser radar and the like. Specifically, the S2 side of film 101 may be coated with a second anti-reflection film by, for example, vacuum evaporation coating. However, it is understood by those skilled in the art that the specific manner of plating the second antireflection film is not limited thereto.

Several specific examples according to the disclosed embodiments of the present invention will be described in detail below with reference to fig. 1, 2 and 3, respectively.

The first embodiment is as follows:

referring again to FIG. 1, FIG. 1 is a schematic view of a planar optical viewing window according to one embodiment of the present invention. As can be seen from fig. 1, the transparent window 103 has a planar shape, and accordingly, the film 101 also has a planar shape, and the film 101 may have the same geometry and dimensions as the transparent window 103. The film 101 can be a black high-transmittance resin film, the transparent window 103 can be a glass window, and the black high-transmittance resin film 101 can be well attached to the inner side surface of the glass window 103 away from the external environment 200 through the OCA adhesive layer 102. Specifically, in this embodiment, the OCA layer 102 and the black high-transmittance resin film 101 may be bonded to the inner side surface of the glass window 103 away from the external environment 200 by rolling the adhesive film. Firstly, the OCA tape and the inner surface of the glass window 103 are rolled and jointed by the roller, and then the black high-transmittance resin film and the OCA tape are rolled and jointed by the roller in the same way, so that the black high-transmittance resin film is well attached to the glass window 103.

Specifically, in this embodiment, the thickness of the black resin thin film 101 may be 0.03mm, and the infrared transmittance thereof may be more than 92% and the visible light transmittance thereof may be less than 5%. And, an antireflection film is further plated on the surface S2 of the black resin film 101, and the antireflection film can be realized by vacuum evaporation plating. The thickness of the OCA glue layer 102 can be in the range of 20-250 μm, and the light transmittance of the OCA glue layer 102 can reach more than 99%. The thickness of the glass window 103 can be in the range of 1mm to 5mm, the light transmittance of the glass window 103 is more than 91%, an antireflection film can be plated on the surface S1 of the glass window 103 close to the external environment 200, a waterproof film can be further plated on the antireflection film, and the antireflection film and the waterproof film can be realized by vacuum evaporation coating, for example.

The OCA glue layer 102 and the resin film 101 have high toughness, the OCA glue layer 102 and the resin film 101 matched according to the thickness have larger impact resistance, the impact resistance of the optical window 100 can be improved, and the optical window 100 can pass a vehicle-specified gravel impact test. Meanwhile, the OCA adhesive layer 102 has high adhesion, so that the optical window 100 can be explosion-proof, that is, glass can not splash when the optical window 100 is broken. The resin film 101 is blackened as a whole, and as described above, the visible light transmittance thereof is less than 5%, so that the appearance of the optical window 100 is blackened as a whole, and the appearance of the optical window 100 is more beautiful. In addition, as described above, the light transmittance of the OCA glue layer 102 can reach more than 99%, and the resin film 101 and the glass window 103 are both coated with antireflection films, so that the infrared transmittance of the whole optical window 100 can be greater than 92%, and the use effect and precision of the laser radar can be ensured.

As described above, the black coating of white glass (ultra-white glass) and PVB (polyvinyl butyral) are laminated to achieve the requirement of blackening and explosion-proof optical windows in the prior art, that is, the structure of the optical window in the prior art at least includes two pieces of glass to laminate PVB to achieve the requirement of blackening and explosion-proof. In contrast, the optical window 100 according to the embodiment of the disclosure has at least one of the following advantages: firstly, the cost is low, on one hand, the production yield of the glass black coating in the prior art is low, which leads to the cost per single glass to be increased, and on the other hand, the optical window 100 according to the disclosed embodiment of the utility model does not need two pieces of glass, but only needs one piece of glass, and the combination of the resin film and the OCA glue is cheaper than the combination of glass and PVB, and the overall cost can be reduced by more than half, specifically, from about 268 yuan/pcs to about 110 yuan/pcs. Secondly, the commonality is good, and resin film can realize arbitrary bending under 0.015mm to 0.5mm thickness, can realize the laminating of different curved surfaces to can realize the explosion-proof function of the optics window of different curved surfaces, improved among the prior art glass and PVB pressfitting window can only be applicable to the defect of plane glass window, can refer to the description in following embodiment two. Thirdly, as mentioned above, the visible light blocking capability of the resin film can make the optical window product black as a whole, so as to meet the requirements of vehicle regulations and make the product more beautiful and elegant. Fourth, the OCA adhesive layer has better infrared transmittance and lower haze (picture graininess) compared with PVB, and the infrared transmittance of the resin film after anti-reflection is equivalent to that of common optical glass, so that the whole optical window according to the embodiment of the utility model has better infrared transmittance, thereby being more beneficial to improving the use effect and precision of the laser radar. Fifth, the optical window according to the embodiment of the present invention can be manufactured by a roll bonding process, which avoids a high temperature pressing process of PVB and glass in the prior art, so that the process is simpler and safer, and the jig can be reused, and has good mass productivity.

The second embodiment is as follows:

referring to fig. 2, fig. 2 is a schematic view of a curved optical window according to an embodiment of the present invention. As can be seen from fig. 2, the transparent window 103 has a curved shape, and accordingly, the film 101 has the same curved shape, and the film 101 may have the same geometry and size as the transparent window 103. The film 101 can be a black high-transmittance resin film, the transparent window 103 can be a glass window, and the black high-transmittance resin film 101 can be well attached to the inner side surface of the glass window 103 away from the external environment 200 through the OCA adhesive layer 102. Specifically, in this embodiment, the OCA layer 102 and the black high-transmittance resin film 101 may be bonded to the inner side surface of the glass window 103 away from the external environment 200 by rolling the adhesive film. Firstly, the OCA tape and the inner surface of the glass window 103 are rolled and jointed by the roller, and then the black high-transmittance resin film and the OCA tape are rolled and jointed by the roller in the same way, so that the black high-transmittance resin film is well attached to the glass window 103.

Specifically, in this embodiment, the thickness of the black resin film 101 may be 0.375mm, at which the black resin film 101 may be arbitrarily bent, and further, the black resin film 101 may be arbitrarily bent in a thickness range of 0.015mm to 0.5mm, and the infrared transmittance of the black resin film 101 may be more than 92% and the visible light transmittance may be less than 5%. In this embodiment, an antireflection film is further coated on the surface S2 of the black resin film 101, and the antireflection film may be formed by vacuum evaporation coating. The thickness of the OCA glue layer 102 can be in the range of 20-250 μm, and the light transmittance of the OCA glue layer 102 can reach more than 99%. The thickness of the curved glass window 103 can be in the range of 1mm to 5mm, the bending curvature radius of the curved glass window 103 can be in the range of 55mm to 500mm, the light transmittance can reach more than 91%, an antireflection film can be plated on the surface S1 of the glass window 103 close to the external environment 200, a waterproof film can be further plated on the antireflection film, and the antireflection film and the waterproof film can be realized by vacuum evaporation coating, for example. As can be seen from this example, the optical window according to the embodiments of the present disclosure can implement processing and manufacturing of a curved optical window, and has significant advantages and advances compared to the prior art in which only a planar optical explosion-proof window can be manufactured by laminating glass and PVB.

Similar to the above description of the first embodiment, the OCA glue layer 102 and the resin film 101 have high toughness, and the OCA glue layer 102 and the resin film 101 with the thickness described in this embodiment have a larger impact resistance, which can improve the impact resistance of the optical window 100, and the optical window 100 can pass the car-specified rock impact test. Meanwhile, the OCA adhesive layer 102 has high adhesion, so that the optical window 100 can be explosion-proof, that is, glass can not splash when the optical window 100 is broken. The resin film 101 is blackened as a whole, and as described above, the visible light transmittance thereof is less than 5%, so that the appearance of the optical window 100 is blackened as a whole, and the appearance of the optical window 100 is more beautiful. In addition, as described above, the light transmittance of the OCA glue layer 102 can reach more than 99%, and the resin film 101 and the glass window 103 are both coated with antireflection films, so that the infrared transmittance of the whole optical window 100 can be greater than 92%, and the use effect and precision of the laser radar can be ensured.

It is understood that the optical window 100 according to this embodiment has the same advantages as described in the first embodiment as compared with the conventional optical window using the conventional technology: low cost, good versatility, better beauty, better infrared transmittance, simpler process, safer operation, better mass production, etc., which are not described in detail herein.

The third concrete embodiment:

referring to fig. 3, fig. 3 is a schematic diagram of an optical window fabrication process route according to an embodiment of the present invention. As can be seen from fig. 3, the process for manufacturing the optical window according to this embodiment may include the following four process steps: coating a film on a glass window; rolling and pasting the film; removing bubbles; and a resin film coating.

In combination with the foregoing, the optical window 100 according to the embodiment of the utility model may include the black resin film 101, the OCA glue layer 102, and the glass window 103. The OCA glue layer 102 may be located between the black resin film 101 and the glass window 103, and the black resin film 101 may be attached to the inner surface of the glass window 103 through the OCA glue layer 102. Moreover, the outer surface S1 of the glass window 103 exposed to the external environment 200 can be plated with a first antireflection film and a waterproof film; the surface of the black resin film 101 on the side away from the glass window 103 may be coated with a second antireflection film. The specific process for fabricating the optical window 100 according to the embodiment of the present invention will be described in further detail with reference to fig. 3.

First, the glass window 103 is coated. Specifically, coating the glass window 103 may include coating an antireflection film and a water-proof film. On the outer surface S1 of the glass window 103, a first antireflection film is first coated by vacuum evaporation coating, for example, and further, a waterproof film is further coated on the first antireflection film by vacuum evaporation coating, for example. As described above, the arrangement of the first antireflection film can further improve the overall infrared transmittance of the optical window 100, thereby being more beneficial to ensuring the use effect and precision of devices such as laser radar. The waterproof film can improve the waterproof performance of the optical window 100, and is more favorable for ensuring the use effect and the precision of equipment such as laser radar and the like in different application environments. Also, it will be understood by those skilled in the art that the specific manner of plating the first antireflection film and the water-repellent film is not limited thereto.

Next, the glass window 103 is subjected to roll lamination. Specifically, the black resin film 101 may be attached to the inner surface of the glass window 103 by the OCA glue layer 102 by a roll lamination method. For example, the OCA adhesive layer 102 and the inner surface of the glass window 103 may be roll-bonded by a roller, the OCA adhesive layer 102 is first bonded to the inner surface of the glass window 103, and then the black resin film 101 and the OCA adhesive layer 102 may be roll-bonded by a roller in the same manner, so that the black resin film 101 and the OCA adhesive layer 102 are bonded, and further the black resin film 101 is bonded to the glass window 103 through the OCA adhesive layer 102.

Then, the product after the above steps is debubbled, for example, the black resin film 101, the OCA glue layer 102 and the glass window 103 can be attached to each other more tightly and without bubbles by increasing the air pressure, so that the subsequent application of the optical window 100 can be more beneficial to ensuring the use effect and accuracy of the laser radar and other devices. Of course, it will be understood by those skilled in the art that the specific implementation of the bubble removal process is not so limited.

Finally, the black resin film 101 is coated. Specifically, a second antireflection film may be coated on the surface S2 of the black resin film 101 on the side away from the glass window 103, for example, by vacuum evaporation coating. As described above, the arrangement of the second antireflection film on the black resin film 101 can further improve the overall infrared transmittance of the optical window 100, thereby being more beneficial to ensuring the use effect and precision of devices such as laser radar. Also, it can be understood by those skilled in the art that the specific implementation of the plating of the antireflection film is not limited thereto.

As can be seen from the above description of the process steps, the manufacturing process of the optical window according to this embodiment is relatively simple and efficient, and the cost is also lower. In particular, an optical viewing window according to this embodiment may achieve an efficiency of less than 30 s/pcs. Obviously, it can be understood by those skilled in the art that the optical window manufacturing process described in this embodiment can be applied to the first embodiment or the second embodiment described above.

In summary, the optical window according to the embodiment of the utility model has at least one of the advantages of low cost (the achievable cost is lower than 50% of the existing production cost), good universality, more beautiful appearance, better infrared transmittance, simpler process, higher production efficiency, safer manufacturing process, better mass production and the like on the basis of well realizing the overall blackening effect and the explosion-proof function of the appearance of the optical window.

The features described in this invention may be embodied in different forms and should not be construed as limited to the examples described in this invention. Rather, the examples described in this disclosure are provided merely to illustrate some of the many possible ways to implement the devices and/or systems described in this disclosure, which will be apparent after understanding the disclosure of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein need not be limited to the order described, but can be performed in any order or in parallel.

Finally, it should be noted that the above description is only an embodiment of the present invention and an illustration of the technical principle applied. It will be appreciated by those skilled in the art that other embodiments formed by any combination of the above technical features or their equivalents without departing from the technical idea should also be covered by the protection scope of the present invention. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.

Claims (13)

1. An optical viewing window, comprising: the film, optics transparent adhesive tape layer and transparent window, optics transparent adhesive tape layer be located the film with between the transparent window, the film passes through optics transparent adhesive tape layer is attached in the surface of transparent window.

2. The optical window of claim 1, wherein the film is a black film.

3. The optical window of claim 1, wherein the film is a black resin film.

4. The optical window of claim 1, wherein the transparent window is made of glass.

5. The optical window of claim 1, wherein the transparent window is a planar window.

6. The optical window of claim 1, wherein the transparent window is a curved window.

7. The optical window of claim 6, wherein the film has a thickness in the range of 0.015mm to 0.5 mm.

8. The optical window of claim 1, wherein the optical transparent adhesive layer is attached to the surface of the transparent window by rolling an adhesive film.

9. The optical window of claim 1, wherein the film is attached to the side of the optical transparent adhesive layer away from the transparent window by rolling the adhesive film.

10. The optical window of claim 1, wherein the film is attached to an inner surface of the transparent window by the optically clear adhesive layer, the inner surface being a surface of the transparent window that faces away from an external environment during use.

11. The optical window of claim 1, wherein a first antireflection coating is disposed on a surface of the transparent window distal from the film.

12. The optical window of claim 11, wherein a water-repellent film is further disposed on a surface of the first antireflection film on a side away from the transparent window.

13. The optical window of claim 1, wherein a second antireflection coating is disposed on a surface of the film on a side of the film remote from the transparent window.

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