A coated lens with a mirror layer

Abstract

This invention discloses a coated lens with a mirror layer, comprising a lens substrate. The surface of the lens substrate is provided with a novel film system, which includes a multi-layer structure. The intermediate layer is a nickel-chromium composite material layer, with a nickel-chromium mixing ratio of 2.5–3.5:0.5–1.5. The physical film thickness of the nickel-chromium composite material layer ranges from 100 to 400 nm. High-refractive-index material layers and low-refractive-index material layers are alternately stacked on both sides of the nickel-chromium composite material layer. The novel film system reduces transmitted light through absorption by the nickel-chromium composite material layer, and achieves high reflectivity on both sides of the composite material layer by controlling the optical film thickness of the high- and low-refractive-index materials on both sides. The addition of a mirror layer to the film layer allows the lens substrate to reflect light from different adjustable light domains on both sides, enabling independent adjustment of the color and optical performance of the front and back sides, greatly enriching the product connotation of vacuum coating for eyeglass lenses.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and in particular to a coated lens with a mirror layer. Background Technology

[0002] Optical thin films are a type of optical medium material composed of thin, layered media that propagate light through interfaces. Applications of optical thin films began in the 1930s. Today, optical thin films are widely used in the fields of optics and optoelectronics to manufacture various optical instruments.

[0003] Optical thin films are classified by application into reflective films, antireflective films, filter films, optical protective films, polarizing films, beam-splitting films, and phase films. The first four are commonly used. Optical reflective films are used to increase specular reflectivity and are often used to manufacture reflective, refractive, and resonant cavity devices. Optical antireflective films are deposited on the surface of optical elements to reduce surface reflection and increase the transmission of the optical system; they are also called antireflective films. Optical filter films are used for spectral or other optical property segmentation; they are diverse and have complex structures. Optical protective films are deposited on the surface of metals or other soft, easily corroded materials or thin films to increase their strength or stability and improve their optical properties.

[0004] Traditional coatings in this field have the following drawbacks:

[0005] 1. The coating layer is one-sided reflective, and the reflective and transmitting surfaces are naturally complementary. It is impossible to adjust the transmitted light. In photochromic lenses with this type of one-sided reflective coating, the light from both sides will interfere, thus affecting the color rendering effect of both sides of the lens.

[0006] 2. It has poor adhesion to the lens substrate and is easily corroded and detached in some special atmospheres, thus affecting its performance. Summary of the Invention

[0007] The purpose of this invention is to provide a coated lens with a mirror layer, wherein the coating layer contains a mirror layer, so that the two sides of the lens substrate reflect light in different adjustable light domains, and the coating layer has strong adhesion to the lens substrate and is not easy to fall off.

[0008] To achieve the above objectives, the solution of the present invention is as follows: a coated lens with a mirror layer, comprising a lens substrate, wherein a novel film system is provided on the surface of the lens substrate, the novel film system comprising a multilayer structure, wherein the intermediate layer is a nickel-chromium material hybrid material layer, the mixing ratio of nickel and chromium materials is 2.5-3.5:0.5-1.5; the physical film thickness of the nickel-chromium material hybrid material layer ranges from 100 to 400 nm;

[0009] The nickel-chromium composite material layer has alternating layers of high-refractive-index material and low-refractive-index material stacked on both sides.

[0010] Furthermore, L iR represents the i-th layer on one side of the nickel-chromium composite material layer. i Let represent the i-th layer on the other side of the nickel-chromium composite material layer, and C represent the nickel-chromium composite material layer;

[0011] The novel film system comprises L2+L1+C+R1+R2, wherein L1 is a titanium oxide material layer, L2 is a silicon oxide material layer, R1 is a titanium oxide material layer, and R2 is a silicon oxide material layer.

[0012] Furthermore, the silicon oxide material layer is made of silicon dioxide, and the titanium oxide material layer is made of titanium dioxide or titanium pentoxide.

[0013] Furthermore, the physical film thickness of the L1 layer is 65.4–0 nm, and the optical thickness is 1.0–0 nm; the physical film thickness of the L2 layer is 0–94.17 nm, and the optical thickness is 0–1.0 nm.

[0014] Furthermore, the physical film thickness of the R1 layer is 65.4–0 nm, and the optical thickness is 1.0–0 nm; the physical film thickness of the R2 layer is 0–94.17 nm, and the optical thickness is 0–1.0 nm.

[0015] After adopting the above scheme, the beneficial effects of the present invention are as follows: the novel film system is achieved by depositing high and low refractive index dielectric materials in a vacuum and adding a nickel-chromium mixed material layer in the middle, with the mixing ratio of nickel and chromium materials being 2.5-3.5:0.5-1.5; the physical film thickness of this layer is in the range of 100-400 nm.

[0016] The novel coating system reduces transmitted light through absorption by a nickel-chromium hybrid material layer, and achieves high reflectivity on both sides of the hybrid material layer by controlling the optical film thickness of the high and low refractive index materials on both sides. Adding a mirror layer to the coating allows for adjustable light reflection from both sides of the lens substrate, enabling independent adjustment of the color and optical properties of both sides, significantly enriching the product offerings of vacuum coating for eyeglass lenses. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a layered structure according to an embodiment of the present invention (I);

[0018] Figure 2 This is a schematic diagram (II) of a layered structure according to an embodiment of the present invention.

[0019] Figure 3 Here is the optical path diagram of light passing through an existing coated lens:

[0020] Figure 4 This is an optical path diagram of light passing through according to an embodiment of the present invention;

[0021] Figure 5This is a spectral curve of the membrane system according to Embodiment 1 of the present invention;

[0022] Figure 6 This is a spectral curve of the film system in Embodiment 2 of the present invention;

[0023] Figure 7 This is a spectral curve of the film system in Embodiment 3 of the present invention;

[0024] Figure 8 This is a spectral curve of the film system in Embodiment 4 of the present invention;

[0025] Figure 9 This is the spectral curve of the film system in Embodiment 5 of the present invention.

[0026] Label Explanation:

[0027] 1. Lens substrate; 2. C nickel-chromium composite material layer; 3. L1 titanium dioxide material layer; 4. L2 silicon dioxide material layer; 5. R1 titanium dioxide material layer; 6. R2 silicon dioxide material layer; 7. L3; 8. L4; 9. R3; 10. R4. Detailed Implementation

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] This invention provides a coated lens with a mirror layer. For example... Figures 1 to 9 As shown, the invention includes a lens substrate, on which a novel film system is provided. This novel film can adhere well to the surface of the lens substrate while ensuring high reflectivity on both sides, so that each side of the lens substrate reflects light in an adjustable range of light without interfering with each other.

[0030] The novel film system comprises a multilayer structure, with a middle layer being a nickel-chromium hybrid material layer. Reflective layers of various colors can be stacked on both sides of the hybrid material layer, i.e., alternating stacking of high-refractive-index and low-refractive-index material layers. Through absorption by the middle hybrid material layer, transmitted light is reduced. Furthermore, by controlling the optical film thickness of the high- and low-refractive-index materials on both sides, high reflectivity can be achieved on both sides of the hybrid material layer. The color and optical properties on both sides of the hybrid material layer can be adjusted independently, allowing the product to display a rich variety of colors.

[0031] In the nickel-chromium hybrid material layer, the mixing ratio of nickel and chromium is 2.5–3.5:0.5–1.5, and the physical film thickness of this layer ranges from 100 to 400 nm. The design principle of this hybrid material layer is as follows:

[0032] The physical properties of neutral spectrophotometers and absorption layers in metallic nickel (Ni) are as follows: Nickel plating is very stable in air, mainly due to the strong passivation ability of metallic nickel. A very thin passivation film can be rapidly formed on the surface, isolating the nickel substrate from the air and thus resisting corrosion from the atmosphere, alkalis, and certain acids. Furthermore, in simple nickel plating solutions, extremely fine-grained coatings with excellent polishing properties can be obtained.

[0033] Chromium (Cr) has strong adhesion properties. Due to its excellent mechanical strength and chemical stability, as well as its excellent neutrality and minimal variation in refractive ratio with wavelength, chromium films are commonly used in neutral density beam splitters. In the visible light region, the reflected beam from a chromium film is white, while the transmitted beam is slightly brownish.

[0034] A hybrid material layer is formed by mixing nickel and chromium in a ratio of 2.5–3.5:0.5–1.5. Adding a layer of chromium between the lens substrate and the nickel plays an important role in improving the adhesion between the nickel and the lens substrate and maintaining the interfacial mechanical stability. This allows the film layer to effectively balance both mechanical and optical properties.

[0035] In this case, L is set up. i R represents the i-th layer on one side of the nickel-chromium composite material layer. i Let L represent the i-th layer on the other side of the nickel-chromium composite material layer, and C represent the nickel-chromium composite material layer. A larger value for i indicates that the layer is farther away from the nickel-chromium composite material layer. The novel membrane structure is: L N +......L3+L2+L1+C+R1+R2+R3+......R N .

[0036] This application does not restrict the number of high-refractive-index and low-refractive-index material layers on both sides of the nickel-chromium composite material layer. The appropriate number of layers can be freely selected according to production and processing needs. The layer in contact with the lens substrate is the low-refractive-index material layer. For example... Figure 1 The nickel-chromium composite material layer has a high-refractive-index material layer and a low-refractive-index material layer on each side; for example... Figure 2 The nickel-chromium composite material layer has two high-refractive-index material layers and two low-refractive-index material layers on each side, and its film structure is: L4+L3+L2+L1+C+R1+R2+R3+R4.

[0037] like Figure 1 As shown, in one embodiment, the novel membrane structure is: L2+L1+C+R1+R2, wherein the material of each layer and the physical film thickness parameters are shown in Table 1.

[0038] L1 is a titanium oxide material layer, which is made of titanium dioxide or titanium pentoxide. The physical film thickness of L1 is 65.4-0 nm, and the optical thickness is 1.0-0 nm.

[0039] L2 is a silicon dioxide material layer. The physical film thickness of the L2 layer is 0–94.17 nm, and the optical thickness is 0–1.0 nm.

[0040] C is a nickel-chromium composite material layer. The material of layer C is a mixture of nickel and chromium with a mixing ratio of 2.5–3.5:0.5–1.5 and a physical film thickness range of 100–400 nm.

[0041] R1 is a titanium oxide material layer, which is made of titanium dioxide or titanium pentoxide. The physical film thickness of the R1 layer is 0–94.17 nm, and the optical thickness is 1.0–0 nm.

[0042] R2 is a silicon dioxide material layer. The physical film thickness of the R2 layer is 0–94.17 nm, and the optical thickness is 0–1.0 nm.

[0043] Table 1

[0044]

[0045] Table 2

[0046]

[0047] Example 1:

[0048] The structural parameters of each layer of the novel film system in this embodiment are shown in Table 2, Example 1. In the nickel-chromium mixed layer, the mixing ratio of nickel and chromium materials is 3:0.8, and the physical film thickness of this layer is designed to be 115 nm. From the film system parameters in Table 2, Example 1, and... Figure 4 It can be seen that the transmittance of this film system is 79.0% when the reference wavelength is 550nm.

[0049] Example 2:

[0050] The structural parameters of each layer of the novel film system in this embodiment are shown in Table 2, Example 2. In the nickel-chromium mixed layer, the mixing ratio of nickel and chromium materials is 3:0.8, and the physical film thickness of this layer is designed to be 250 nm. From the film system parameters in Table 2, Example 2, and... Figure 5 It can be seen that the transmittance of this film system is 65.3% when the reference wavelength is 550nm.

[0051] Example 3:

[0052] The structural parameters of each layer of the novel film system in this embodiment are shown in Table 2, Example 3. In the nickel-chromium mixed layer, the mixing ratio of nickel and chromium materials is 3:0.8, and the physical film thickness of this layer is designed to be 375 nm. From the film system parameters in Table 2, Example 2, and... Figure 5 It can be seen that the transmittance of this film system is 47.5% when the reference wavelength is 550nm.

[0053] Example 4:

[0054] The structural parameters of each layer of the novel film system in this embodiment are shown in Table 2, Example 4. In the nickel-chromium mixed layer, the mixing ratio of nickel and chromium materials is 2.5:1, and the physical film thickness of this layer is designed to be 115 nm. From the film system parameters in Table 2, Example 4, and... Figure 5 It can be seen that the transmittance of this film system is 58.6% when the reference wavelength is 550nm.

[0055] Example 5:

[0056] The structural parameters of each layer of the novel film system in this embodiment are shown in Table 2, Example 4. In the nickel-chromium mixed layer, the mixing ratio of nickel and chromium materials is 3:0.5, and the physical film thickness of this layer is designed to be 115 nm. From the film system parameters in Table 2, Example 4, and... Figure 5 It can be seen that the transmittance of this film system is 77.8% when the reference wavelength is 550nm.

[0057] Figure 3 and Figure 4 This is a schematic diagram of the light path, where dashed lines represent weak light rays and solid lines represent strong light rays.

[0058] Figure 3 This is a light path diagram showing how light travels through an existing coated lens. The coating is composed of alternating layers of high and low refractive index materials. Figure 3 It can be seen that the existing traditional coating layer reflects light from one side only, and the transmitted light is the reflected complementary light (non-absorption film system). When light passes through ordinary, non-absorption film layers with high and low refractive index, the transmitted light is still relatively strong. The light from both sides of the lens substrate will interfere with and affect each other, thus affecting the color rendering effect of both sides of the lens.

[0059] Figure 4 This is an optical path diagram of light passing through the coated lens in this embodiment. The novel film system adds a mixed material layer to the film layers formed by alternating stacking of high and low refractive index materials. The mixed material layer has strong adhesion and strong absorption of light on both sides, with an absorption rate of 40%-80%. The transmitted light is weakened, so that the light on both sides of the mixed material layer does not interfere with each other, and the color and optical performance of both sides of the lens can be adjusted independently.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A coated lens with a mirror layer, characterized in that: The invention includes a lens substrate, the surface of which is provided with a novel film system. The novel film system comprises a multilayer structure, wherein the middle layer is a nickel-chromium mixed material layer, the mixing ratio of nickel and chromium is 2.5~3.5:0.5~1.5, and the physical film thickness of the nickel-chromium mixed material layer ranges from 100 to 400 nm. The nickel-chromium composite material layer has alternating layers of high-refractive-index material and low-refractive-index material stacked on both sides; L i R represents the i-th layer on one side of the nickel-chromium composite material layer. i Let represent the i-th layer on the other side of the nickel-chromium composite material layer, and C represent the nickel-chromium composite material layer; The novel film system comprises L2+L1+C+R1+R2, wherein L1 is a titanium oxide material layer, L2 is a silicon oxide material layer, R1 is a titanium oxide material layer, and R2 is a silicon oxide material layer.

2. The coated lens with a mirror layer as described in claim 1, characterized in that: The silicon oxide material layer is made of silicon dioxide, and the titanium oxide material layer is made of titanium dioxide or titanium pentoxide.

3. The coated lens with a mirror layer as described in claim 1, characterized in that: The physical thickness of the L1 layer is 0~65.4nm, and the quarter-wavelength optical thickness is 0~1.0nm. The physical thickness of the L2 layer is 0~94.17nm, and the quarter-wavelength optical thickness is 0~1.0nm.

4. The coated lens with a mirror layer as described in claim 1, characterized in that: The physical thickness of the R1 layer is 0~65.4nm, and the quarter-wavelength optical thickness is 0~1.0nm. The physical thickness of the R2 layer is 0~94.17nm, and the quarter-wavelength optical thickness is 0~1.0nm.

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