Near-infrared discrete light source system for human eye safety

Abstract

The invention discloses a near-infrared discrete light source system for human eye safety, which comprises a middle frame fixing frame, an optical assembly arranged in the middle frame fixing frame, a light source assembly arranged at the tail end of the middle frame fixing frame and a light guide support arranged in the middle frame fixing frame, the light guide support is arranged between the optical assembly and the light source assembly; the optical assembly comprises a front fly's-eye lens, a rear fly's-eye lens and a convex lens which are arranged in sequence, and the convex lens is arranged close to the light guide support. The brand-new near-infrared discrete light source system is composed of the middle frame fixing frame, the optical assembly, the light source assembly and the light guide support, light source supplementation can be carried out under the condition that visible light is poor, and the purposes of improving the influence of the environment on the auxiliary driving system and improving the safety performance of the auxiliary driving system are achieved.

Description

Technical Field

[0001] The present invention relates to the field of advanced driver assistance applications, and in particular to a near-infrared discrete light source system for human eye safety. Background Art

[0002] In the existing technology, as time goes by, more and more advanced driver assistance systems are applied to various types of vehicles. The vigorous application of advanced driver assistance systems has greatly improved the driving safety factor, reduced the labor intensity of driving, and provided great protection for the driver's safe travel.

[0003] As far as the current market is concerned, the commonly used technology is still the visible light (RGB) advanced driver assistance system, which can output stably when the visible light is good. However, when the visible light is poor, such as in rainy days, foggy days, nights and other environments, the performance of the visible light (RGB) advanced driver assistance system will be greatly affected.

[0004] How to improve the problem of system performance degradation caused by environmental influences is a technical problem that technicians in this field need to solve urgently.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a near-infrared discrete light source system for human eye safety, so as to achieve the purpose of improving the impact of the environment on the assisted driving system and improving the safety performance of the assisted driving system.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A near-infrared discrete light source system for human eye safety, comprising a middle frame fixing frame, an optical component arranged in the middle frame fixing frame, a light source component arranged at the rear end of the middle frame fixing frame, and a light guide support arranged in the middle frame fixing frame, wherein the light guide support is arranged between the optical component and the light source component;

[0009] The optical component comprises a front fly-eye lens, a rear fly-eye lens and a convex lens which are arranged in sequence, and the convex lens is arranged via the light guide support.

[0010] The present invention forms a new near-infrared discrete light source system consisting of a middle frame fixing frame, an optical component, a light source component and a light guide support, which can supplement the light source when the visible light is poor, thereby achieving the purpose of improving the impact of the environment on the assisted driving system and enhancing the safety performance of the assisted driving system.

[0011] It is further worth noting that the optical assembly is mounted in the middle frame fixing frame via a lens mounting assembly;

[0012] The lens mounting assembly comprises a lens fixing base and a lens fixing upper cover matched with the lens fixing base; the lens fixing base and the lens fixing upper cover realize the installation of the front fly-eye lens, the rear fly-eye lens and the convex lens.

[0013] It is further worth noting that the light source assembly includes a near-infrared discrete light source PCBA board arranged at the rear end of the middle frame fixing frame and a near-infrared discrete light fill light source arranged on the near-infrared discrete light source PCBA board.

[0014] It is further worth noting that a waterproof glass is provided at the head end of the middle frame fixing frame, the waterproof glass is installed close to the front compound eye lens, and the waterproof glass seals the head end of the middle frame fixing frame.

[0015] It is further worth noting that a rear cover matching with the middle frame fixing frame is also provided at the rear end of the middle frame fixing frame.

[0016] It is further worth noting that a waterproof silicone ring is provided between the back cover and the middle frame fixing frame, and the waterproof silicone ring realizes sealing between the middle frame fixing frame and the back cover.

[0017] It is further worth noting that a waterproof connector cooperating with the light source assembly is provided on the back cover; when the back cover is mounted on the end of the middle frame fixing frame, the waterproof connector performs waterproof sealing on the near-infrared discrete light fill light source.

[0018] It is further worth noting that the back cover is mounted on the end of the middle frame fixing frame by fastening screws.

[0019] It is further worth noting that the back cover is provided with a waterproof vent hole, and the waterproof vent hole is provided with a waterproof breathable membrane.

[0020] It is further worth noting that the near-infrared discrete light fill light source can generate an 808nm near-infrared light beam.

[0021] The present invention has the following advantages:

[0022] 1. The present invention forms a new near-infrared discrete light source system consisting of a middle frame fixing frame, an optical component, a light source component and a light guide support, which can supplement the light source when the visible light is poor, thereby achieving the purpose of improving the impact of the environment on the assisted driving system and improving the safety performance of the assisted driving system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of an explosion of a near-infrared discrete light source system for human eye safety disclosed in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structural assembly of a near-infrared discrete light source system for human eye safety disclosed in an embodiment of the present invention;

[0026] The numbers and letters in the figure represent the corresponding component names:

[0027] 1. Middle frame fixing frame 21. Front compound eye lens 22. Rear compound eye lens 23. Convex lens

[0028] 31. Near-infrared discrete light source PCBA board 32. Near-infrared discrete light fill light source 4. Light guide support

[0029] 51. Lens fixing base 52. Lens fixing cover 6. Waterproof glass 7. Back cover 71. Waterproof vent hole

[0030] 72. Waterproof breathable membrane 8. Waterproof silicone ring 9. Waterproof connector. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] The present invention provides a near-infrared discrete light source system for human eye safety. Its working principle is that a new near-infrared discrete light source system is composed of a middle frame fixing frame, an optical component, a light source component and a light guide support. The system can supplement the light source when the visible light is poor, thereby achieving the purpose of improving the impact of the environment on the assisted driving system and improving the safety performance of the assisted driving system.

[0033] The present invention is further described in detail below with reference to examples and specific implementation modes.

[0034] like Figure 1 and Figure 2As shown, a near-infrared discrete light source system for human eye safety includes a middle frame fixing frame 1, an optical component arranged in the middle frame fixing frame, a light source component arranged at the rear end of the middle frame fixing frame, and a light guide support 4 arranged in the middle frame fixing frame, wherein the light guide support is arranged between the optical component and the light source component, and the optical component is installed in the middle frame fixing frame through a lens mounting component.

[0035] The optical component comprises a front fly-eye lens 21, a rear fly-eye lens 22 and a convex lens 23 which are arranged in sequence, and the convex lens is arranged adjacent to the light guide support.

[0036] The light source assembly includes a near-infrared discrete light source PCBA board 31 arranged at the rear end of the middle frame fixing frame and a near-infrared discrete light fill light source 32 arranged on the near-infrared discrete light source PCBA board.

[0037] The lens mounting assembly includes a lens fixing base 51 and a lens fixing upper cover 52 matched with the lens fixing base; the lens fixing base and the lens fixing upper cover realize the installation of the front fly-eye lens, the rear fly-eye lens and the convex lens.

[0038] The head end of the middle frame fixing frame is provided with a waterproof glass 6, the waterproof glass is installed close to the front compound eye lens, and the waterproof glass seals the head end of the middle frame fixing frame. The tail end of the middle frame fixing frame is also provided with a back cover 7 that matches the middle frame fixing frame. A waterproof silicone ring 8 is provided between the back cover and the middle frame fixing frame, and the waterproof silicone ring realizes the sealing between the middle frame fixing frame and the back cover. The back cover is provided with a waterproof connector 9 that matches the light source assembly; when the back cover is installed at the end of the middle frame fixing frame, the waterproof connector waterproofs the near-infrared discrete light fill light source. The back cover is installed at the end of the middle frame fixing frame by tightening screws. The back cover is provided with a waterproof vent hole 71, and the waterproof vent hole is provided with a waterproof breathable membrane 72.

[0039] The specific use steps of the present invention are as follows: Figure 1 and Figure 2 As shown, in actual use, when the visible light is not good, the near-infrared discrete light source PCBA board 31 controls VCSEL32 [near-infrared discrete light fill light source] to turn on, and VCSEL32 generates an 808nm near-infrared light beam and transmits it forward through the light guide support 4. The light beam passes through the convex lens 23, the rear compound eye lens 22 and the front compound eye lens 21 in sequence, and uses the optical resonant cavity to realize the self-excited oscillation of light, that is, laser oscillation, and finally transmits and emits an 808nm laser beam to illuminate the target in front, which is convenient for reliable imaging in rainy days, foggy days, at night or in environments with poor visible light.

[0040] During the test, the size of the optical resonant cavity is adjusted by adjusting the distance between the front fly-eye lens 21 and the rear fly-eye lens 22, the distance between the rear fly-eye lens 22 and the convex lens 23, and the distance between the convex lens 23 and the VCSEL 32. [During the development stage, the relative positions of the convex lens 23, the rear fly-eye lens 22 and the front fly-eye lens 21 can be adjusted to facilitate simulation and meet test requirements until the optimal positions of the three lenses are obtained and fixed. The positions of the three lenses are fixed after leaving the factory.]

[0041] At the same time, the front compound eye lens 21 and the rear compound eye lens 22 both use compound eye lenses, and each compound eye has an aspheric surface, which controls the shape of the laser beam emitted and plays a role in homogenizing the light spot, ensuring that the energy beam of each distribution point on its divergent shape is uniform. Through the design of the compound eye lens and the distance between the front compound eye lens 21, the rear compound eye lens 22, and the convex lens 23, under the control of the optical simulation software, the energy emitted by the near-infrared discrete light source is controlled to achieve performance indicators that meet the safety of human eyes.

[0042] At the same time, due to the presence of the waterproof glass 6, the waterproof silicone ring 8 and the waterproof connector, the safety of the entire system is improved and the service life of the entire system is extended.

[0043] Through the above method, the near-infrared discrete light source system for human eye safety provided by the present invention is composed of a middle frame fixing frame, an optical component, a light source component and a light guide support to form a new near-infrared discrete light source system. It can supplement the light source under poor visible light conditions, thereby achieving the purpose of improving the impact of the environment on the assisted driving system and improving the safety performance of the assisted driving system. In addition, this system is an active light source and can actively provide a fill light source for imaging in rainy days, foggy days, at night or in environments with poor visible light. The imaging recognition distance is 0 to 300 meters, and the safety of the human eye is also guaranteed, which can meet both the fill light requirements and the human eye safety requirements.

[0044] The above is only a preferred embodiment of a near-infrared discrete light source system for human eye safety disclosed in the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A near-infrared discrete light source system for human eye safety, characterized in that: It comprises a middle frame fixing frame, an optical component arranged in the middle frame fixing frame, a light source component arranged at the rear end of the middle frame fixing frame, and a light guide support arranged in the middle frame fixing frame, wherein the light guide support is arranged between the optical component and the light source component; The optical component comprises a front fly-eye lens, a rear fly-eye lens and a convex lens arranged in sequence, and the convex lens is arranged close to the light guide support; A waterproof glass is provided at the head end of the middle frame fixing frame, the waterproof glass is installed close to the front compound eye lens, and the waterproof glass seals the head end of the middle frame fixing frame; The rear end of the middle frame fixing frame is also provided with a rear cover matched with the middle frame fixing frame; A waterproof silicone ring is provided between the back cover and the middle frame fixing frame, and the waterproof silicone ring realizes sealing between the middle frame fixing frame and the back cover; The back cover is provided with a waterproof connector that matches the light source assembly; when the back cover is installed at the end of the middle frame fixing frame, the waterproof connector performs waterproof sealing on the near-infrared discrete light fill light source; The back cover is provided with a waterproof vent hole, and the waterproof vent hole is provided with a waterproof vent membrane.

2. The near-infrared discrete light source system for human eye safety according to claim 1, characterized in that: The optical assembly is installed in the middle frame fixing frame through a lens mounting assembly; The lens mounting assembly comprises a lens fixing base and a lens fixing upper cover matched with the lens fixing base; the lens fixing base and the lens fixing upper cover realize the installation of the front fly-eye lens, the rear fly-eye lens and the convex lens.

3. The near-infrared discrete light source system for human eye safety according to claim 1, characterized in that: The light source assembly includes a near-infrared discrete light source PCBA board arranged at the rear end of the middle frame fixing frame and a near-infrared discrete light fill light source arranged on the near-infrared discrete light source PCBA board.

4. The near-infrared discrete light source system for human eye safety according to claim 1, characterized in that: The rear cover is mounted on the end of the middle frame fixing frame by fastening screws.

5. The near-infrared discrete light source system for human eye safety according to claim 3, characterized in that: The near-infrared discrete light fill light source can generate an 808nm near-infrared light beam.

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