Optical system and vehicle light

Abstract

The utility model discloses an optical system and car light. Optical system includes light source substrate, light source, pattern mask layer and microlens array, the surface of light source substrate is provided with first reflection layer, and the reflectivity of first reflection layer is greater than 60%, light source sets up on light source substrate, light source includes light emitting element and the condenser lens of light emitting element light side, pattern mask layer is located on the light path of light source, and the side of pattern mask layer is close to light source is provided with second reflection layer, and the reflectivity of second reflection layer is greater than 60%, pattern mask layer includes mask pattern, and mask pattern penetrates second reflection layer, and microlens array includes the multiple microlens units of array distribution. Adopt above technical scheme, improve light utilization, enhance projection pattern brightness and pattern boundary definition, can reduce light source power consumption simultaneously, improve system light efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging technology, and in particular to an optical system and a vehicle lamp. Background Technology

[0002] With rapid economic development, vehicle headlight projection functions have become widely used. During the projection process, the light energy utilization rate is a key factor that directly affects the projection clarity and brightness.

[0003] Traditional projection optical systems often struggle to balance brightness and projected image sharpness. On one hand, due to the structural design of optical components, light emitted from the light source is easily absorbed, resulting in a significant waste of light energy. A large amount of effective light fails to reach the projection end, reducing the efficiency of light energy utilization. On the other hand, the dispersion of light emitted from the light source leads to a lower proportion of effective luminous flux, directly causing insufficient brightness in the projected image and resulting in blurred image edges, further affecting projection quality. Utility Model Content

[0004] This invention provides an optical system and vehicle lamp that improves the structure of the light source, the light source substrate and the pattern mask layer, increases light utilization, enhances projection brightness and makes the projection pattern clearer, and at the same time improves the effect of edge dispersion of the pattern.

[0005] In a first aspect, the present invention provides an optical system, comprising: a light source substrate, a light source, a patterned mask layer, and a microlens array;

[0006] A first reflective layer is disposed on the surface of the light source substrate, and the reflectivity of the first reflective layer is greater than 60%.

[0007] The light source is mounted on the light source substrate; the light source includes a light-emitting element and a focusing lens located on the light-emitting side of the light-emitting element;

[0008] The patterned mask layer is located in the light output path of the light source; a second reflective layer is provided on the side of the patterned mask layer closest to the light source, and the reflectivity of the second reflective layer is greater than 60%; the patterned mask layer includes a mask pattern, and the mask pattern penetrates the second reflective layer;

[0009] A microlens array comprises multiple microlens units arranged in an array.

[0010] Optionally, the microlens array includes a first microlens array;

[0011] The patterned mask layer and the first microlens array are located sequentially in the light-emitting path of the light source.

[0012] Optionally, the microlens array includes a first microlens array and a second microlens array;

[0013] The second microlens array, the patterned mask layer, and the first microlens array are located sequentially in the light-emitting path of the light source.

[0014] Optionally, the patterned mask layer includes multiple mask pattern units arranged in an array;

[0015] The mask pattern units and microlens units are set up in a one-to-one correspondence.

[0016] Optionally, the light source has an output beam angle ranging from 30° to 120°.

[0017] Optionally, the optical system may also include a collimating lens located in the optical path between the light source and the patterned mask layer.

[0018] Optionally, the condenser lens may include a convex lens.

[0019] Optionally, the first reflective layer includes a reflective white ink layer.

[0020] Optionally, the second reflective layer includes at least one of an aluminum reflective layer, a silver reflective layer, or an alloy reflective layer.

[0021] Secondly, this utility model provides a vehicle lamp, including the aforementioned optical system.

[0022] This invention provides an optical system and a vehicle lamp. By encapsulating a focusing lens on the light-emitting element of the light source, the emitted light is focused in one stage, concentrating the angular range of the emitted light and resulting in stronger light energy. This increases the luminous flux ratio while reducing the power consumption of the light source at the same brightness. A first reflective layer with a reflectivity greater than 60% is set on the light source substrate, and a second reflective layer with a reflectivity greater than 60% is set on the side of the pattern mask layer near the light source. In this way, light that has not been transmitted through the mask pattern can be reflected successively by the high-reflectivity second reflective layer and the first reflective layer into the light-emitting path, improving the reflectivity of the pattern mask layer, increasing the utilization rate of reflected light, improving the light output efficiency of the system, and enhancing the brightness and clarity of the projected pattern. The improvements to the light source, pattern mask layer, and light source substrate solve the problems of low light utilization, low brightness of the projected pattern, and high power consumption of the light source in traditional vehicle lamp projection systems. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an optical system structure provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the light path propagation in an optical system provided by an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the light distribution curve of a normal Lambertian distribution light source in an optical system.

[0026] Figure 4 This is a schematic diagram of the light distribution curve of an optical system provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the illumination results of an optical system.

[0028] Figure 6 This is a schematic diagram of the illuminance results of the optical system provided in this embodiment of the present invention.

[0029] In the embodiments of this utility model, the reference numerals and corresponding feature names are as follows:

[0030] 10-Light source, 11-Light emission element, 12-Condensing lens, 20-Light source substrate, 21-First reflective layer, 30-Patterned mask layer, 31-Second reflective layer, 32-Mask pattern unit, 40-Microlens array, 50-First microlens array, 41-Microlens unit, 60-Second microlens array, 70-Collimating lens. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] The terminology used in the embodiments of this utility model is for the purpose of describing specific embodiments only and is not intended to limit the utility model. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when referring to an element being formed "on" or "below" another element, it can be formed not only directly on or below the other element, but also indirectly on or below it through an intermediate element. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Figure 1 This is a schematic diagram of an optical system structure provided by an embodiment of the present invention. Figure 2 This is a schematic diagram of light path propagation in an optical system according to an embodiment of the present invention. This embodiment is applicable to situations in optical systems where light utilization and pattern projection effects need to be improved. Figure 1 and Figure 2 As shown, the optical system provided in this embodiment of the present invention includes: a light source substrate 20, a light source 10, a pattern mask layer 30, and a microlens array 40; a first reflective layer 21 is disposed on the surface of the light source substrate 20, and the reflectivity of the first reflective layer 21 is greater than 60%; the light source 10 is disposed on the light source substrate 20; the light source 10 includes a light-emitting element 11 and a condensing lens 12 located on the light-emitting side of the light-emitting element; the pattern mask layer 30 is located in the light-emitting path of the light source 10; a second reflective layer 31 is disposed on the side of the pattern mask layer 30 near the light source 10, and the reflectivity of the second reflective layer 31 is greater than 60%; the pattern mask layer 30 includes a mask pattern unit 32, which penetrates the second reflective layer 31; the microlens array 40 includes a plurality of microlens units 41 arranged in an array.

[0035] In this embodiment, the light source substrate 20 can be understood as a functional base component used to support and fix the light source element, and to provide electrical connection and optical adaptation for the light source element. It is one of the core basic components of the light source system. The first reflective layer 21 can be understood as a reflective layer disposed on the surface of the light source substrate 20 or a coating of reflective material applied to the surface of the light source substrate 20.

[0036] The light source 10 can be understood as a device capable of converting electrical energy into light energy and emitting a light beam outward. The light source 10 includes a light-emitting element 11 and a condensing lens 12 located on the light-emitting side of the light-emitting element. The light-emitting element 11 refers to the component used to emit light; for example, the light-emitting element 11 includes, but is not limited to, a light-emitting diode (LED). The condensing lens 12 can be understood as an optical element that, through its own curved optical structure, refracts and converges divergent, parallel, or diffused incident light beams, concentrating the light energy in a specific area, thereby increasing the light intensity density in that area. For example, the condensing lens 12 includes, but is not limited to, a convex lens or an aspherical lens; this embodiment of the invention does not limit this. By focusing the light emitted from the light-emitting element 11 through the condensing lens 12, the light becomes more concentrated and possesses stronger light energy.

[0037] The patterned mask layer 30 can be understood as a functional thin film with a preset geometric shape or pattern, realizing the control of light signal transmission. For example, a mask pattern unit 32 with a striped pattern can be preset on the patterned mask layer 30. The mask pattern unit 32 penetrates the second reflective layer 31 to form a light-transmitting area for transmitting patterned light. This utility model embodiment does not limit this. The mask pattern 32 in this utility model embodiment can be set to match the projection pattern requirements of the welcome projection light, and its specific shape is not limited here. Further, a second reflective layer 31 is provided on the side of the patterned mask layer 30 near the light source 10. The second reflective layer 31 can be understood as a reflective film layer disposed on the surface of the patterned mask layer 30. It is used to reflect light incident on the patterned mask layer 30 but not incident on the mask pattern to the light source substrate 20. Together with the first reflective layer 21 on the surface of the light source substrate 20, the light is reflected again into the light path to improve the light extraction efficiency.

[0038] The microlens array 40 can be understood as an integrated optical element formed by a large number of microlens units with sizes ranging from micrometers to millimeters, arranged closely according to a preset pattern. It can achieve optical effects with large area, high efficiency, and multiple functions that are difficult to achieve with a single lens. Multiple microlens units 41 can be understood as multiple microlenses located in the microlens array 40 and arranged closely according to a preset pattern.

[0039] Specifically, conventional methods involve plating chromium onto the pattern mask layer for light reflection. However, due to the low reflectivity of chromium, the light reflectivity is typically only around 50%, and chromium also absorbs light significantly, resulting in a large amount of light loss and low light utilization. Therefore, in this embodiment, a first reflective layer 21 is formed on the surface of the light source substrate 20. The first reflective layer 21 can be made of reflective white ink with a reflectivity greater than 60%. A second reflective layer 31 with a reflectivity greater than 60% is formed on the side of the pattern mask layer 30 closest to the light source 10. The second reflective layer 31 can replace the low-reflectivity chromium layer with a high-reflectivity metal layer plated with aluminum, silver, or an alloy. Based on its strong reflectivity, the second reflective layer 31 can reflect light incident on the pattern mask layer 30 but not onto the mask pattern back to the surface of the first reflective layer 21. The surface of the first reflective layer 21 can then reflect the light again back into the light path, thus significantly improving the utilization rate of reflected light.

[0040] For example, such as Figure 2 The schematic diagram of the light path propagation in the optical system shows that the light source 10 focuses the light emitted from the light-emitting element 11 through the condenser lens 12, making the light emission angle more concentrated. The emitted light is incident on the second microlens array 60. The focused light passing through the second microlens array 60 then passes through the pattern mask layer 30. Part of the light is transmitted through the mask pattern 32 of the pattern mask layer 30 to the microlens array 40, where it is focused and transmitted. Another part of the light is reflected by the second reflective layer 31 of the pattern mask layer 30 to the light source substrate 20. The reflected light from the second reflective layer 31 is further reflected by the first reflective layer 21 of the light source substrate 20 to the pattern mask layer 30. The reflected light continues to be transmitted and reflected until the reflected light from the second reflective layer 31 of the pattern mask layer 30 is reduced to the point where it is no longer reflected. Through the above process, the reflected light from the first reflective layer 21 and the second reflective layer 31 is reused and focused by the microlens array 40 for projection, improving the utilization rate of the light emitted from the light source 10 and improving the light emission efficiency of the entire optical system.

[0041] The optical system provided in this embodiment of the invention achieves primary focusing of the light emitted from the light source 10 by encapsulating a focusing lens 12 with a focusing function on the light-emitting element 11. This concentrates the angular range of the emitted light from the light source 10, resulting in stronger light energy, increasing the proportion of luminous flux, and reducing the power consumption of the light source at the same brightness. A first reflective layer with a light reflectivity greater than 60% is provided on the light source substrate 20, and a second reflective layer 31 with a light reflectivity greater than 60% is provided on the side of the pattern mask layer 30 near the light source 10. In this way, light that has not been transmitted through the mask pattern can be reflected successively by the high-reflectivity second reflective layer and the first reflective layer into the light output path, improving the light reflectivity of the pattern mask layer 30, increasing the utilization rate of reflected light, improving the light output efficiency of the system, and enhancing the brightness and clarity of the projected pattern. The improvements to the light source 10, the pattern mask layer 30, and the light source substrate 20 solve the problems of low light utilization, low brightness of the projected pattern, and high power consumption of the light source in traditional automotive lighting projection systems.

[0042] Optional, you can continue to refer to Figure 1 The microlens array 40 includes a first microlens array 50; the patterned mask layer 30 and the first microlens array 50 are located sequentially in the light-emitting path of the light source.

[0043] In this embodiment, the first microlens array 50 can be understood as a microlens array disposed on the side of the pattern mask layer 30 away from the light source 10. Specifically, the pattern mask layer 30 and the first microlens array 50 are arranged sequentially along the optical path emission direction. The emitted light beam is transmitted through the mask pattern unit 32 of the pattern mask layer 30 to the first microlens array 50, and then focused and projected by the first microlens array 50.

[0044] For example, in an optical system, a patterned mask layer 30 and a first microlens array 50 are arranged along the light emission direction. Light emitted from the light source 10 is incident on the patterned mask layer 30. A portion of the light is transmitted through the mask pattern of the patterned mask layer 30 to the first microlens array 50, where it is focused and transmitted. Another portion of the light is reflected by the second reflective layer 31 of the patterned mask layer 30 to the light source substrate 20. The reflected light from the second reflective layer 31 is further reflected by the first reflective layer 21 of the light source substrate 20 to the patterned mask layer 30. The reflected light continues to undergo transmission and reflection until the reflected light from the second reflective layer 31 of the patterned mask layer 30 is reduced to the point where reflection ceases. The emitted light from the light source 10, the transmitted light from the first microlens array 50, and the reflected light from the light source substrate 20 all participate in imaging.

[0045] Optionally, the microlens array 40 includes a first microlens array 50 and a second microlens array 60; the second microlens array 60, the patterned mask layer 30 and the first microlens array 40 are sequentially located in the light output path of the light source 10.

[0046] The first microlens array 50 and the second microlens array 60 can be understood as two integrated microlens arrays formed by a large number of microlens units with sizes ranging from micrometers to millimeters, arranged closely according to a preset pattern.

[0047] Specifically, the second microlens array 60, the pattern mask layer 30, and the first microlens array 50 are arranged sequentially along the light path emission direction. Before the light emitted from the light source 10 is transmitted through the mask pattern of the pattern mask layer 30, it is first focused by the second microlens array 60. The focused light transmitted through the second microlens array 60 is then transmitted through the mask pattern of the pattern mask layer 30 to the first microlens array 50, and then focused and projected by the first microlens array 50.

[0048] For example, in an optical system, a light source substrate 20, a light source 10, a collimating lens 70, a second microlens array 60, a pattern mask layer 30, and a first microlens array 50 are sequentially arranged along the light path exit direction. The light emitted from the light source 10 is incident on the second microlens array 60, focused by the second microlens array 60, and transmitted to the pattern mask layer 30. The light is then transmitted through the mask pattern of the pattern mask layer 30 to form a split beam that is incident on the first microlens array 50. The first microlens array 50 focuses and projects the split pattern light.

[0049] This embodiment of the invention arranges a second microlens array 60, a patterned mask layer 30, and a first microlens array 50 sequentially along the light emission direction in an optical system. Before entering the patterned mask layer 30, the light emitted from the light source 10 undergoes a focusing adjustment via the second microlens array 60, and then the transmitted light is projected onto the image through the patterned mask layer 30 and the first microlens array 50. This three-stage coordinated control concentrates light energy in the effective imaging area, ensuring high-quality projection imaging, improving light utilization, and achieving high-fidelity, high-brightness, and low-distortion images. This solves the problems of low light utilization and imaging distortion in traditional projection systems.

[0050] The above embodiments have described in detail the arrangement of the first microlens array and the second microlens array in the optical system provided by this utility model. The following explanation details the arrangement of the pattern mask layer in the optical system provided by the above embodiments. Please refer to [link / reference needed]. Figure 1 .

[0051] Specifically, the pattern mask layer 30 and the microlens array 40 are correspondingly arranged. The light emitted from the light source 10 first enters the second microlens array 60. The focused light beam passing through the second microlens array 60 then passes through the pattern mask layer 30. The mask pattern allows light to pass through, while the light-blocking area reflects the light. The transmitted light enters the microlens array 40. After receiving the pattern beam transmitted from the pattern mask layer 30, the microlens array 40 converges the diverging pattern sub-beams and projects the beam. This flexible arrangement of the pattern mask layer 30 allows for flexible changes in the beam projection angle without the need to re-fabricate components, reducing adaptation costs.

[0052] Optional, you can continue to refer to Figure 1 The patterned mask layer 30 includes multiple mask pattern units 32 arranged in an array; the mask pattern units 32 are arranged in a one-to-one correspondence with the microlens units.

[0053] In this embodiment, the mask pattern unit 32 can be understood as a functional pattern pre-designed and fabricated on the pattern mask layer 30 and having a specific geometric shape and spatial distribution. For example, the mask pattern unit 30 includes, but is not limited to, striped patterns, and this embodiment of the present invention does not limit this.

[0054] Specifically, multiple arrays of mask pattern units 32 are set on the pattern mask layer 30. The positional and quantity characteristics of the mask pattern units 32 correspond one-to-one with the position and quantity of the microlens units of the microlens array 40 in space, ensuring that the light control of the mask pattern units 32 can be precisely applied to the corresponding microlens units to achieve light focusing and precise imaging.

[0055] This embodiment of the invention, by setting multiple arrays of mask pattern units 32 on the pattern mask layer 30, and ensuring that the mask pattern units 32 correspond to the microlens units, achieves precise incident light beams formed by the pattern mask layer 30 onto the corresponding microlens units, ultimately forming a clear and misaligned projected image, thus reducing chromatic aberration at the pattern edges. This solves the problem of chaotic light patterns controlled by the microlens array 40 due to mismatches between the light-transmitting areas of the mask pattern units 32 and the microlens units, while also preventing the microlens array 40 from failing to fully utilize light energy, thus reducing the brightness of the projected pattern.

[0056] Optionally, the light source has an output beam angle ranging from 30° to 120°.

[0057] In this embodiment, the emitted beam angle of the light source 10 can be understood as the sum of the angles between the two symmetrical directions and the emitted beam peak direction when the peak intensity of the emitted beam drops to 50%, based on the peak intensity of the emitted beam.

[0058] Specifically, without focusing encapsulation of the light source 10, the normal LED Lambertian light beam angle range can reach 120°. The emitted light from the light source 10 is relatively dispersed, and the light energy is not concentrated. (See reference...) Figure 3 A schematic diagram of the light distribution curve of a normal Lambertian distribution light source. After encapsulating a focusing lens 12 with a focusing function on the light source 10, the emitted light from the light source 10 is focused once, making the emitted beam angle of the light source 10 smaller. The emitted beam angle can be concentrated between 30° and 120°, at which point the light energy ratio is higher. (See reference...) Figure 4 .

[0059] The light source 10 is encapsulated with a focusing lens 12. The light beam emitted by the light-emitting element 11 is focused once by the focusing lens 12 before exiting, reducing the original 120° exit beam angle range to within 30°-120°. This reduces the exit beam angle range of the light source 10, making the light energy more concentrated. Under the same brightness, this reduces the power consumption of the light source 10 and improves system efficiency. The divergent light is then focused and incident on the effective area of ​​the collimating lens 70 for conversion, which helps the collimating lens 70 to collect and collimate the light to the effective area, enhancing the brightness of the projected pattern and making the boundaries of the projected pattern clearer. This solves the problems of high power consumption, low projection brightness, and blurred projection pattern boundaries caused by the dispersion of the light emitted by the light source 10.

[0060] Optional, you can continue to refer to Figure 1 The optical system also includes a collimating lens 70 located in the optical path between the light source 10 and the pattern mask layer 30.

[0061] In this embodiment, the collimating lens 70 can be understood as an optical element that corrects diverging or converging incident beams into parallel or nearly parallel beams through its own curved optical structure, thereby controlling the beam propagation direction and reducing the divergence angle.

[0062] Specifically, a collimating lens 70 is disposed between the light source 10 and the pattern mask layer 30 to convert the emitted light from the light source 10 into parallel light. Since the emitted beam angle decreases after the light source 10 is focused once, the light incident on the collimating lens 70 is more concentrated. Therefore, the aperture of the collimating lens 70 can be set to be smaller than the aperture of the collimating lens 70 when the light source 10 is not focused, thereby reducing the design size of the entire optical system.

[0063] For example, the light-emitting element 11 of the light source 10 emits concentrated light after being focused once by the condenser lens 12. The emitted light is incident on the effective area of ​​the collimating lens 70, which receives the light and converts the emitted light from the light source 10 into parallel light for subsequent optical path transmission.

[0064] This embodiment of the invention uses a collimating lens 70, whose parameters are matched to those of the light source 10, placed between the light source 10 and the pattern mask layer 30. This corrects the direction of the emitted beam, reduces the spread of the light spot over long distances, and achieves precise control of the beam direction, ensuring accurate subsequent imaging. This solves the problem of poor projection imaging quality caused by beam misalignment in traditional optical paths.

[0065] Optional, you can continue to refer to Figure 1 The condenser lens 12 includes a convex lens.

[0066] Specifically, a condenser lens 12, including a convex lens, is encapsulated on the light-emitting element 11 of the light source 10. The design, parameters, and performance of the convex lens must match the characteristics of the light source 10, and the light energy utilization rate of the light emitted from the light-emitting element 11 is improved through the light-concentrating effect of the convex lens.

[0067] For example, the light-emitting element 11 of the light source 10 is directly encapsulated with the focusing convex lens as a single unit. After being powered on, the light-emitting element 11 emits divergent light at a 120° angle in all directions. The divergent light enters the convex lens and is refracted by the convex surface, causing it to deflect towards the optical axis. This reduces the divergence from 45° to only 7.5°. The light beam, focused by the convex lens, exits from the convex surface of the lens and enters the subsequent optical path.

[0068] This embodiment of the invention uses a convex lens with a focusing function encapsulated in the light source 10. Through the refraction of the convex lens, the divergent light emitted by the light-emitting element 11 can be focused into a concentrated beam, thereby achieving the focusing function and improving the light energy utilization rate. The small size and simple structure of the convex lens allow it to be directly integrated inside the light source 10 package, eliminating the need for an additional external focusing structure and simplifying the optical system.

[0069] Optional, you can continue to refer to Figure 1 The first reflective layer 21 includes a reflective white ink layer.

[0070] Specifically, the first reflective layer 21 includes a reflective white ink layer. The light reflectivity of conventional ink can only reach 50%-60%, while the light reflectivity of white ink can reach more than 90%, enabling the light source substrate 20 to fully reflect the reflected light from the pattern mask layer 30 and improve the utilization rate of reflected light.

[0071] Optional, you can continue to refer to Figure 1 The second reflective layer 31 includes at least one of an aluminum reflective layer, a silver reflective layer, or an alloy reflective layer.

[0072] Specifically, the second reflective layer 31 includes at least one of an aluminum reflective layer, a silver reflective layer, or an alloy reflective layer. Conventionally, the second reflective layer 31 uses chromium reflective material, which suffers from low reflectivity and significant light absorption. Aluminum, silver, or alloy reflective layers all have higher reflectivity than chromium, with silver achieving a reflectivity of over 90% and low light absorption, thus improving the reflectivity of the light emitted from the light source 10 and preventing light waste. Alloy reflective layers include, but are not limited to, silver-copper alloys or aluminum-magnesium alloys; this embodiment of the invention does not impose such limitations.

[0073] The synergistic design of the dual-layer reflection of the first reflective layer 21 and the second reflective layer 31 improves the utilization rate of reflected light from the pattern mask layer 30 and the reflectivity of light emitted from the light source 10, thus making full use of light energy. This improves the light output efficiency of the optical system, resulting in brighter projected images and clearer patterns, and solves the problems of low light utilization and wasted light energy in the optical system.

[0074] This utility model embodiment also provides a vehicle lamp that includes the optical system described in the above optional embodiments.

[0075] Specifically, the headlight incorporates a microlens array, along with a light source substrate, a light source, and a collimating lens. The microlens array corresponding to the light source projects a specific pattern onto the ground, effectively increasing the maximum illuminance of the projected pattern compared to headlight projections from traditional optical systems. (See reference...) Figure 5 Traditional optical systems for vehicle headlight projection achieve a maximum illuminance of 2020, while the optical system using this solution achieves a maximum illuminance of 2110, representing a 4% increase in maximum projection illuminance. (For reference...) Figure 6 And according to Figure 5 and Figure 6 The projection illuminance data shows that the projection illuminance of the vehicle headlight projection system using the traditional optical system is always less than that of the optical system using this solution as the projection illuminance increases. The projection system efficiency of the optical system designed in this solution is greatly improved.

[0076] This utility model embodiment provides a vehicle lamp with an optical system including the above-described optional embodiments. In the optical system, the light source is initially focused by a packaged condensing lens to improve light utilization. Then, through double reflection by the first and second reflective layers, more than 60% of the leaked light is recovered to the main optical path. Combined with the focusing effect of a microlens array, the optical system achieves full utilization of light, reduces light energy loss, and achieves ultra-high luminous efficiency and projection clarity for the vehicle lamp projection. The illuminance of the projection lamp is significantly improved compared to projection using traditional optical systems. It avoids insufficient projection brightness and blurred projection pattern boundaries caused by uneven illumination and insufficient brightness, effectively improving the projection clarity of the vehicle lamp and ensuring the practicality and reliability of the vehicle lamp projection.

[0077] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An optical system, characterized in that, include: Light source substrate, light source, patterned mask layer, and microlens array; The surface of the light source substrate is provided with a first reflective layer, and the reflectivity of the first reflective layer is greater than 60%. The light source is disposed on the light source substrate; the light source includes a light-emitting element and a focusing lens located on the light-emitting side of the light-emitting element; The patterned mask layer is located in the light output path of the light source; a second reflective layer is provided on the side of the patterned mask layer near the light source, and the reflectivity of the second reflective layer is greater than 60%; the patterned mask layer includes a mask pattern, and the mask pattern penetrates the second reflective layer; The microlens array comprises multiple microlens units arranged in an array.

2. The optical system according to claim 1, characterized in that, The microlens array includes a first microlens array; The patterned mask layer and the first microlens array are located sequentially in the light-emitting path of the light source.

3. The optical system according to claim 1, characterized in that, The microlens array includes a first microlens array and a second microlens array; The second microlens array, the patterned mask layer, and the first microlens array are sequentially located in the light-emitting path of the light source.

4. The optical system according to claim 1, characterized in that, The patterned mask layer includes multiple mask pattern units arranged in an array; The mask pattern unit and the microlens unit are arranged in a one-to-one correspondence.

5. The optical system according to claim 1, characterized in that, The light source has a beam angle range of 30°-120°.

6. The optical system according to claim 1, characterized in that, The optical system also includes a collimating lens located in the optical path between the light source and the patterned mask layer.

7. The optical system according to claim 1, characterized in that, The focusing lens includes a convex lens.

8. The optical system according to claim 1, characterized in that, The first reflective layer includes a reflective white ink layer.

9. The optical system according to claim 1, characterized in that, The second reflective layer includes at least one of an aluminum reflective layer, a silver reflective layer, or an alloy reflective layer.

10. A vehicle light comprising the optical system according to any one of claims 1-9.

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