An optical generation device and sensor based on single-lens integration

Abstract

The utility model provides a kind of light generating device and sensor based on single-lens integration, light emitting device includes light emitting unit, lens assembly and PCB assembly;The lens assembly includes lens shell and the integrated single lens collinear with the optical axis of the light emitting unit, the incident surface of the integrated single lens is line diffusion surface, the emergent surface of the integrated single lens is beam collimating surface, so that the integrated single lens has collimating and line expansion function simultaneously;The PCB assembly provides circuit and chip bonding.The light emitting device line laser uniformity of the utility model can be comparable with traditional double-component scheme, and the divergence angle is widely controllable, simultaneously realizes miniaturization, and the thickness of module is reduced, so that it can be applied to micro 3D scanning and industrial detection robot and other application scenarios with higher space requirements.

Description

Technical Field

[0001] This utility model relates to the field of optical and laser sensing technology, and in particular to a light generating device and sensor based on single-lens integration. Background Technology

[0002] Line light sources or line laser modules, as optical devices, are primarily used to convert the light output of a light source (such as a laser or ordinary light source) into a thin beam (line light source) or a line laser (line laser). These devices are widely used in industrial inspection, optical measurement, medical equipment, machine vision, and other fields to provide uniform linear light illumination or scanning functionality.

[0003] Traditional line light source or line laser modules typically require at least two discrete optical elements: a collimating lens and a line diffuser (such as a Powell prism or cylindrical mirror array). The collimating lens converts the point light source into parallel light, while the line diffuser converts the parallel light into line laser light. However, this dual-element discrete architecture has several problems: the large number of optical components leads to high material costs; precise calibration is required during assembly, resulting in low yield and high labor costs; furthermore, the large module size limits sensor miniaturization. Although existing improvements mainly focus on optimizing the design of individual lenses (such as aspherical collimating lenses) or prism structures, they have not yet overcome the limitations of the dual-element discrete architecture and cannot fundamentally solve the above problems. Utility Model Content

[0004] This utility model provides a light generating device based on a single lens integration, including: a light-emitting unit, a lens assembly, and a PCB assembly; the PCB assembly provides circuitry and chip bonding, the light-emitting unit is disposed on the PCB assembly and connected to the PCB assembly, and the integrated single lens is located above the light-emitting unit and is at a certain distance from the light-emitting unit;

[0005] The lens assembly includes a lens housing and an integrated single lens that is collinear with the optical axis of the light-emitting unit. The integrated single lens includes an incident surface and an exit surface. The incident surface of the integrated single lens is a line diffusion surface, and the exit surface of the integrated single lens is a beam collimation surface, so that the integrated single lens has both collimation and line diffusion functions.

[0006] Optionally, the curvature of the exit surface of the integrated single lens is asymmetrically distributed in the X and Y axis directions; a microstructure array is designed in the Y axis direction to generate a linear light intensity distribution; and collimation characteristics are maintained in the X axis direction.

[0007] Optionally, the incident surface of the integrated single lens is a special freeform surface, and the exit surface of the integrated single lens is a convex aspherical surface.

[0008] Optionally, the lens housing is a transparent housing.

[0009] Optionally, the lens housing is made of the same material as the integrated single lens and is integrally injection molded.

[0010] Optionally, the lens housing is made of optical glass or optical plastic.

[0011] Optionally, the light-emitting unit is a single light-emitting unit; the single light-emitting unit includes a laser diode or an LED point light source.

[0012] Optionally, the light-emitting unit includes an LED chip array composed of multiple LED chip patches.

[0013] Optionally, the applicable light source has an effective divergence angle of 20° to 80° and a wavelength of 400nm to 780nm in the visible light band or 780nm to 1050nm in the near-infrared band.

[0014] This invention also provides a sensor, including the light generating device based on single-lens integration as described in any of the above claims.

[0015] The light-generating device based on single-lens integration of this invention has achieved a significant breakthrough in performance. Its line laser uniformity is comparable to that of traditional dual-component solutions, and its divergence angle has a wide controllable range, which can be flexibly set between 15° and 140° by adjusting the surface parameters.

[0016] In terms of industrial value, the light-generating device and sensor based on single-lens integration of this invention have significant cost advantages. Specifically, the injection molding cost of the single lens in the light-emitting device is significantly reduced compared to traditional solutions. Simultaneously, miniaturization is achieved, and the module thickness is reduced, making it suitable for space-constrained applications such as micro 3D scanning and industrial inspection robots. Furthermore, the light-generating device based on single-lens integration of this invention also possesses strong anti-interference capabilities. Due to the single-lens design, there is no stray light reflected between lenses, effectively improving the signal-to-noise ratio.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a light generating device based on a single lens integration according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1The diagram shows a side view of the lens assembly in a light generator based on a single lens integration.

[0021] Figure 3 yes Figure 1 The diagram shows another perspective view of the lens assembly in a light generator based on a single lens integration.

[0022] Figure 4 This is a simulation diagram of the emission azimuth angle of the light-generating device based on a single-lens integrated according to an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of an integrated single lens according to another embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the light-emitting unit according to another embodiment of the present invention;

[0025] Figure 7 This is a simulation diagram of the luminous azimuth angle of another embodiment of the present invention;

[0026] Among them, 10 is the light-emitting unit, 20 is the lens assembly, 21 is the integrated single lens, 21a is the incident surface, 21b is the exit surface, 22 is the lens housing, and 30 is the PCB assembly. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] This utility model embodiment provides a light generating device based on single-lens integration, which is a line laser or line-type light generating device based on single-lens integration. For example... Figure 1 As shown, the light generating device based on single-lens integration in this embodiment of the present invention includes: a light-emitting unit 10, a lens assembly 20, and a PCB assembly 30. Figure 1 The light-generating device based on a single lens integration shown emits light from the light-emitting unit 10, which is then shaped and emitted by the lens assembly 20. The PCB assembly 30 provides circuitry and chip bonding, that is, it fixes the integrated circuit or other semiconductor device of the chip onto the PCB through physical and electrical connections, enabling the chip to connect to external circuits. The light-emitting unit 10 is disposed on the PCB assembly 30, realizing the electrical connection between the light-emitting unit 10 and the PCB assembly 30. The integrated single lens 21 is located above the light-emitting unit 10 and is at a certain distance from the light-emitting unit 10.

[0032] The lens assembly 20 includes a lens housing 22 and an integrated single lens 21 that is collinear with the optical axis of the light-emitting unit 10. The integrated single lens 21 includes an incident surface 21a and an exit surface 21b. The incident surface 21a of the integrated single lens 21 is a line diffusion surface, and the exit surface 21b of the integrated single lens 21 is a beam collimation surface, so that the integrated single lens 21 has both collimation and line diffusion functions.

[0033] Optionally, the curvature of the exit surface 21b of the integrated single lens 21 differs in the X-axis and Y-axis directions. In an optional embodiment of this invention, the incident surface 21a of the integrated single lens 21 is a special freeform surface, achieving linear light diffusion; the exit surface 21b of the integrated single lens 21 is a convex aspherical surface, achieving beam collimation. In this embodiment of the invention, the curvature of the exit surface 21b of the integrated single lens 21 is asymmetrically distributed in the X-axis and Y-axis directions; a microstructure array is designed in the Y-axis direction (diffusion direction) to generate a linear light intensity distribution; simulation data shows that collimation characteristics are maintained in the X-axis direction (orthogonal direction). That is, the light emitted by the light-emitting unit 10 first reaches the incident surface 21a of the single integrated lens, undergoes directional diffusion on the incident surface 21a, and then reaches the exit surface 21b of the single integrated lens. At the exit surface 21b, the light is further collimated, thereby forming a uniform line laser. This utility model embodiment innovatively designs the optical surface shape of the incident and exit surfaces of the lens, enabling a single lens to simultaneously collimate the beam of an LED or laser diode point light source and diffuse the collimated light in one dimension, thereby reducing the number of optical components and thus reducing manufacturing costs.

[0034] The freeform surface of the integrated single lens 21 in this embodiment can be an even-order aspherical / toroidal / biconical array or a specially designed free combination lens; if the integrated single lens 21 is an injection-molded lens, the freeform surface can be of various irregular shapes, as long as it conforms to the production environment. A microstructure array is designed in the Y-axis direction (diffusion direction), i.e., the diffusion direction of the curved surface is an aspherical array, or it can be a Powell surface array; the number of arrays should not be small; this ensures the uniformity and collimation of the line laser in both directions.

[0035] In an optional embodiment of this utility model, the design parameters of the incident surface 21a of the integrated single lens 21 may include: the curvature parameters in the diffusion direction are: 0.8 < radius of curvature < 1.4, -0.5 < conic coefficient < -1.2, 1E-03 < quadratic coefficient < 5E-03, 2E-04 < quartic coefficient < 7E-04, 5E-06 < sixth coefficient < 9E-06; and no curvature in the other direction. The design parameters of the exit surface 21b of the integrated single lens 21 may include: the curvature parameters in the collimation direction are: -1.8 < radius of curvature < -3.2, -0.8 < conic coefficient < -1.2, -1E-03 < quartic coefficient < -3E-03, -1E-03 < sixth coefficient < -2E-03, 1E-03 < eighth coefficient < 2E-03; and no curvature in the other direction.

[0036] Figure 5This is a schematic diagram of an integrated single lens 21 according to another embodiment of the present invention, in which the top and bottom surfaces of the integrated single lens 21 are changed, and testing shows that its optical effect is good. In practical applications, the surface shape of the integrated single lens 21 of this embodiment can be changed according to different light-emitting units 10 and optical requirements. For example, if the size of the light-emitting chip changes, the lens surface shape needs to be changed; if the emission wavelength changes, the lens surface shape needs to be changed appropriately; if the emission type changes, such as from a Lambertian distribution to a Gaussian distribution, the light-emitting surface shape needs to be changed appropriately; if the optical requirements change, such as the divergence angle of the diffusion surface of a line light source changes, the surface shape of the microstructure changes, and the conic coefficient or higher-order coefficient changes; if the power of the light source changes, the entrance pupil size can be changed, and the optical invariants can be changed, etc. Specifically, it can be adaptively adjusted according to actual needs, and this embodiment does not limit this.

[0037] The integrated single lens 21 of this embodiment can be connected to the inner wall of the lens housing 22, and the lens housing 22 can be independently set up from the integrated single lens 21. When the lens housing 22 and the integrated single lens 21 are independently set up, the materials of the lens housing 22 and the integrated single lens 21 can be the same or different. The lens housing 22 can also be made of the same material as the integrated single lens 21 and integrally injection molded. The integrated single lens 21 or the lens housing 22 mainly serves to protect the integrated single lens 21 and position the integrated single lens 21. The lens housing 22 fixes the integrated single lens 21 in a suitable position so that it can work according to the requirements of the optical design.

[0038] In practical applications, the lens housing 22 can be made of optical glass or optical plastic. When optical plastic is chosen, it can be integrally injection molded, and specific materials such as PC (polycarbonate) and PMMA (polymethyl methacrylate, commonly known as acrylic) can be selected. When optical glass is chosen, it can be molded, and specific materials such as K9, BK7, and quartz can be selected. Optical glass requires high uniformity, high optical quality, and good thermal stability in high-power laser applications. Optical plastic has advantages such as low cost, light weight, and easy processing, making it particularly suitable for mass production. In practical applications, the choice can be made according to specific needs, and this embodiment does not impose any limitations on this.

[0039] In an optional embodiment of this utility model, the light-emitting unit 10 is a single light-emitting unit; the single light-emitting unit includes a laser diode or an LED point light source. The laser light source can be an edge-emitting laser (EEL) or a vertical-cavity surface-emitting laser (VCSEL); the LED light source can be a surface-mount light source or a through-hole light source; the effective divergence angle of the light source applicable to this utility model embodiment is 20° to 80°, and the wavelength is 400nm to 780nm in the visible light band or 780nm to 1050nm in the near-infrared band. Figure 4 The diagram shows a simulation of the emission azimuth angle. It can be seen from the figure that the half-intensity full angle of the optical divergence angle in the X-axis direction is about 4°, which is approximately collimated. The optical divergence angle in the Y-axis direction is about 110°, and the emission is relatively uniform, which is consistent with the characteristics of a line laser.

[0040] In another optional embodiment of this utility model, the light-emitting unit 10 includes an LED chip array composed of multiple LED chip patches, such as... Figure 6 As shown, the light-emitting chip is an LED chip array, whose divergence angle conforms to the Lambertian distribution curve. Five LED chip patches are used in the figure. The light-emitting effect is shown in [the figure / image / description]. Figure 7 The collimation and diffusion directions conform to the laws of line light sources. Using LED chips can reduce costs and extend lifespan, while using arrays can increase light intensity. In certain applications, LED chips are preferred.

[0041] This utility model embodiment also provides a sensor, including the light generating device based on single lens integration described in the above embodiment.

[0042] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A light-generating device based on a single-lens integration, characterized in that, include: The light-emitting unit (10), lens assembly (20), and PCB assembly (30) are provided with circuitry and chip bonding. The light-emitting unit (10) is disposed on the PCB assembly (30) and connected to the PCB assembly (30). The integrated single lens (21) is located above the light-emitting unit (10) and is a certain distance away from the light-emitting unit (10). The lens assembly (20) includes a lens housing (22) and an integrated single lens (21) collinear with the optical axis of the light-emitting unit (10). The integrated single lens (21) includes an incident surface (21a) and an exit surface (21b). The incident surface (21a) of the integrated single lens (21) is a line diffusion surface, and the exit surface (21b) of the integrated single lens (21) is a beam collimation surface, so that the integrated single lens (21) simultaneously has collimation and line diffusion functions.

2. The light generating device based on single-lens integration according to claim 1, characterized in that, The curvature of the exit surface (21b) of the integrated single lens (21) is asymmetrically distributed in the X-axis and Y-axis directions; a microstructure array is designed in the Y-axis direction to generate a linear light intensity distribution; Maintain collimation characteristics in the X-axis direction.

3. The light generating device based on single-lens integration according to claim 1, characterized in that, The incident surface (21a) of the integrated single lens (21) is a freeform surface, and the exit surface (21b) of the integrated single lens (21) is a convex aspherical surface.

4. The light generating device based on single-lens integration according to claim 1, characterized in that, The lens housing (22) is a transparent housing.

5. The light generating device based on single-lens integration according to claim 4, characterized in that, The lens housing (22) is made of the same material as the integrated single lens (21) and is integrally injection molded.

6. The light generating device based on single-lens integration according to claim 5, characterized in that, The lens housing (22) is made of optical glass or optical plastic.

7. The light generating device based on single-lens integration according to any one of claims 1-6, characterized in that, The light-emitting unit (10) is a single light-emitting unit; the single light-emitting unit includes a laser diode or an LED point light source.

8. The light generating device based on single-lens integration according to any one of claims 1-6, characterized in that, The light-emitting unit (10) includes an LED chip array composed of multiple LED chip patches.

9. The light generating device based on single-lens integration according to any one of claims 1-6, characterized in that, The applicable light source has an effective divergence angle of 20° to 80° and a wavelength of 400nm to 780nm in the visible light band or 780nm to 1050nm in the near-infrared band.

10. A sensor, characterized in that, The light generating device based on single-lens integration, as described in any one of claims 1-9.

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