Optical element

Abstract

The utility model belongs to the field of optics, and particularly relates to an optical element which comprises a substrate layer used for bearing a reflecting surface, the substrate layer is in a concave shape, and the position close to the middle of the substrate layer is concave downwards; the reflecting layer forms a reflecting surface, the reflecting layer is arranged on the substrate layer, and the shape of the reflecting layer is matched with that of the substrate layer; the thickness of the substrate layer is larger than that of the reflecting layer. Through the arrangement, the production cost is reduced so as to adapt to a large-scale demand market.

Description

Technical Field

[0001] The utility model belongs to the field of optics, and particularly relates to an optical element. Background Art

[0002] As a core optical element in a telecentric display device, with the gradual expansion of the telecentric display device market, the demand for the curved mirror increases accordingly. In the prior art, the curved substrate of the curved mirror is formed by hot bending glass, and the reflecting surface is formed by coating. In the market environment with a small demand when the telecentric display device just emerged, the above method of manufacturing the curved mirror could still be tolerated. However, for now, due to the expansion of the market, the demand for the curved mirror increases, and in order to achieve a more immersive visual effect, the area of the curved mirror is increased. All of the above factors will increase the cost of forming the reflecting surface by coating, making it unable to meet the current demand. Summary of the Utility Model

[0003] The utility model is precisely proposed based on the above requirements of the prior art. The technical problem to be solved by the utility model is to provide an optical element to reduce the production cost.

[0004] To solve the above problems, the technical solutions provided by the utility model include:

[0005] An optical element is provided, including: a base layer for carrying a reflecting surface, the base layer is in a concave shape, and it is concave downward at the middle position; a reflecting layer for forming the reflecting surface, the reflecting layer is disposed on the base layer, and its shape is adapted to the base layer. The reflecting layer is formed by a metal or a composite layer. The metal is stainless steel, iron, aluminum, an alloy of iron or an alloy of aluminum. The composite layer includes a resin layer and a reflecting film layer, and the resin layer is disposed on the reflecting film layer; the thickness of the base layer is greater than that of the reflecting layer.

[0006] The reflecting layer formed by the above materials has good oxidation resistance, can effectively prevent oxidation, so as to avoid the uneven reflectivity and roughness of the reflecting surface after oxidation, which affects the imaging effect. The reflecting layer formed by the composite layer protects the reflecting film layer through the resin layer to maintain the overall stability. In addition, the above reflecting layer can greatly save costs compared with coating, especially for large-caliber sizes. The larger the caliber, the greater the cost that can be saved. Further, since the reflecting layer formed by the above materials is prone to deformation or instability, the thickness of the reflecting layer should be set to be less than that of the base layer. The base layer provides the ability to resist deformation to prevent deformation, and the reflecting layer provides a smooth reflecting surface, making the optical element as a whole stable and having good reflecting performance.

[0007] Preferably, the base layer is a glass substrate or an aluminum substrate.

[0008] Through the above settings, the ability to resist deformation can be provided through a glass substrate or an aluminum substrate.

[0009] Preferably, the thickness range of the stainless - steel mirror is 0.1 mm to 5 mm.

[0010] Preferably, the thickness range of the base layer is 1 mm to 20 mm.

[0011] Preferably, the optical element further includes a connection layer, and the connection layer is arranged between the base layer and the reflection layer to connect the base layer and the reflection layer.

[0012] Preferably, the base layer and the reflection layer are adhesively arranged through the connection layer.

[0013] Preferably, the thickness of the base layer is positively correlated with the diameter of the base layer, and the thickness of the reflection layer is positively correlated with the diameter of the reflection layer.

[0014] Preferably, the aluminum substrate includes a substrate formed of aluminum alloy.

[0015] Compared with the prior art, the present utility model uses a material with good oxidation resistance as the material of the reflection layer, which can effectively prevent oxidation, thus avoiding the uneven reflectivity and roughness of the reflection surface after oxidation and affecting the imaging effect. The reflection layer formed by the composite layer protects the reflection film layer through the resin layer to maintain the overall stability. In addition, the material of the above - mentioned reflection layer can greatly save costs compared with coating, especially for large - diameter sizes. The larger the diameter, the greater the cost savings. Further, since the above - mentioned material is prone to deformation after forming, the thickness of the reflection layer should be set to be less than the thickness of the base layer. The base layer provides the ability to resist deformation to prevent deformation, and the reflection layer provides a smooth reflection surface, making the optical element stable as a whole and having good reflection performance. At the same time, an aluminum substrate or a glass substrate that can resist deformation is set as a support to provide the ability to maintain the shape and bending degree of the stainless - steel mirror, so as to enable normal imaging finally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the embodiments of this specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic side - view layered structure diagram of an optical element in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0019] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] The terms "top", "bottom", "above...", "below", and "on..." described throughout the text are relative positions with respect to the components of the device, such as the relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional and is independent of its orientation in space.

[0021] To facilitate the understanding of the embodiments of this application, the following will further explain with specific examples with reference to the accompanying drawings. The examples do not constitute a limitation to the embodiments of this application.

[0022] This embodiment provides an optical element, as Figure 1 shown.

[0023] The optical element includes a base layer 3 and a reflective layer 1.

[0024] The reflective layer 1 is disposed above the optical element, and a reflective surface is formed on its surface. The reflective layer 1 is disposed on the base layer 3, and the reflective layer 1 is adapted to the shape of the base layer 3 and fits each other.

[0025] The reflective layer is formed of a metal or a composite layer, and the metal is stainless steel, iron, aluminum, an alloy of iron, or an alloy of aluminum.

[0026] Exemplarily, the stainless steel material has good reflectivity, that is, it can form a good mirror effect and can reflect the incident light along the path of light propagation. For metal materials without oxidation resistance or with weak oxidation resistance, when their surfaces come into contact with air, oxidation reactions will occur to form uneven mottles, which will affect the reflectivity and imaging effect. The good oxidation resistance of the stainless steel material makes it more stable and durable, and can maintain a stable high reflectivity for a long time. Based on the above description, while maintaining a good reflection effect, the reflective layer 1 has a lower cost compared to coating.

[0027] Exemplarily, the composite layer includes a resin layer and a reflective film layer. The resin layer is disposed on the reflective film layer to protect the reflective film from abrasion. While maintaining overall stability, the cost is saved.

[0028] Although the reflective layer 1 has the above advantages, due to its property of being prone to deformation, it requires the base layer 3 to provide corresponding support to prevent the reflective layer 1 from deforming and affecting the imaging effect.

[0029] Furthermore, the thickness range of the reflective layer 1 is 0.1 mm to 5 mm.

[0030] The base layer 3 is disposed below the optical element and is used to carry the reflective surface. The base layer 3 forms a concave surface, that is, the base layer 3 is in a sunken shape, and it is sunken downward at the middle position. The bending degree of the base layer 3 and the reflective layer 1 at the corresponding positions is the same so that there is no gap between the two.

[0031] The base layer 3 needs to have good anti-deformation ability so that the base layer 3 can continuously maintain the presented sunken shape and form a curved surface. Under the maintenance of the non-deformability of the base layer 3, the reflective layer 1 maintains its shape without change.

[0032] Exemplarily, the base layer 3 can be formed by hot bending of glass. Alternatively, the base layer 3 is formed of metal, such as an aluminum substrate, which can be an alloy material containing aluminum, to have excellent anti-deformation ability. Thus, the stability of the optical element is maintained.

[0033] In addition, in order to maintain the current state of the reflective layer 1 and prevent the reflective layer 1 from deforming, the thickness of the base layer 3 is set to be greater than the thickness of the reflective layer 1 to meet the requirement of preventing deformation. Further, the thicknesses of the base layer 3 and the reflective layer 1 are positively correlated with the diameter of the base layer 3 and the stainless steel mirror.

[0034] Furthermore, the thickness range of the base layer 3 is 1 mm to 20 mm.

[0035] The optical element further includes a connection layer 2 disposed between the base layer 3 and the reflection layer 1 to connect the two and maintain their stability. Further, the coverage area of the connection layer 2 coincides with the corresponding coverage areas of the base layer 3 and the reflection layer 1. Exemplarily, the connection layer 2 is an adhesive layer.

[0036] Further, the thicknesses of the base layer 3 and the reflection layer 1 are positively correlated with the diameters of the base layer 3 and the reflection layer 1, that is, when the diameter is larger, the thicknesses of the base layer 3 and the reflection layer 1 need to be increased.

[0037] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present application. It should be understood that the above are only specific embodiments of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical element, characterized in that, Comprising: A base layer for carrying a reflecting surface, the base layer being concave, and its middle position being concave downward; A reflective layer that forms the reflecting surface, the reflective layer being provided on the base layer, having a shape adapted to the base layer, the reflective layer being formed of metal or a composite layer, the metal being stainless steel, iron, aluminum, an alloy of iron or an alloy of aluminum, and the composite layer including a resin layer and a reflective film layer, the resin layer being provided on the reflective film layer; The thickness of the base layer is greater than that of the reflective layer.

2. The optical element according to claim 1, characterized in that, The base layer is a glass substrate or an aluminum substrate.

3. The optical element according to claim 1, characterized in that, The thickness range of the reflective layer is 0.1 mm to 5 mm.

4. The optical element according to claim 1, wherein The thickness range of the base layer is 1 mm to 20 mm.

5. The optical element according to claim 1, characterized in that, The optical element further includes a connecting layer provided between the base layer and the reflective layer to connect the base layer and the reflective layer.

6. The optical element according to claim 5, characterized in that, The base layer and the reflective layer are adhesively provided through the connecting layer.

7. The optical element according to claim 1, characterized in that, The thickness of the base layer is positively correlated with the diameter of the base layer, and the thickness of the reflective layer is positively correlated with the diameter of the reflective layer.

8. The optical element according to claim 2, wherein The aluminum substrate includes a substrate formed of aluminum alloy.

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