Laser emitting device for laser cigarette lighter

Abstract

The utility model relates to the technical field of laser cigarette lighters, in particular to a laser emitting device for a laser cigarette lighter. The laser emitting device comprises a laser, a plano-convex lens, window glass, a copper substrate and a cooling fin; the plano-convex lens is installed on the laser, the plano-convex lens comprises a cylindrical section and a spherical section, the spherical section is located on the upper end face of the cylindrical section, the lower end face of the cylindrical section is tightly attached to the top face of the laser, and the window glass is installed on the upper side of the spherical section; the laser is a semiconductor laser capable of emitting solid light spots, the laser is installed on the copper substrate, and the copper substrate is fixed to the cooling fin. According to the utility model, the problems of high cost, complex structure, large size and the like in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser cigarette lighter technical field especially relates to a laser emission device for laser cigarette lighter. BACKGROUND

[0002] With the continuous development of semiconductor laser technology, the volume of laser diode is getting smaller and smaller, and its electro-optical conversion efficiency is continuously improved, which can produce enough laser energy for lighting cigarette under lower power consumption, and the volume is smaller and the life is longer. Advanced optical lens and focusing system can accurately focus laser beam on tobacco of cigarette, realize fast and efficient lighting, and through designing special light path structure, the risk of laser leakage is reduced, and the safety of use is improved.

[0003] In order to avoid the pollution of ignited cigarette to the light emitting window of the cigarette lighter when laser lighting, the ignition point is generally arranged away from the laser emission window. The laser emission light path of the existing laser cigarette lighter adopts aspherical lens, which projects the laser light emitting surface into a certain position away from the emission window in the lighting cavity by using the object-image relationship of the lens, and carries out laser lighting. The price of aspherical lens is high, and the position and size of laser and lighting point in the laser light path need to be high to meet the imaging relationship of aspherical lens, which needs special structure to fix the lens, and the distance between the lens and the laser is far, which increases the volume of the cigarette lighter. In addition, the price of aspherical glass lens is high, which leads to low cost performance of using aspherical lens.

[0004] Therefore, the existing laser emission device has the following problems:

[0005] ①Cost problem: the price of aspherical lens is expensive, which increases the manufacturing cost of laser cigarette lighter, and is not conducive to its promotion and popularization in the market. ②Complexity problem: in order to meet the position and size requirements of laser and lighting point in the laser light path to the imaging relationship of aspherical lens, special structure is needed to fix the lens, which increases the complexity of the structure of the cigarette lighter, and also improves the manufacturing difficulty and cost. ③Volume problem: the distance between aspherical lens and laser is far, which increases the volume of the cigarette lighter, affects its portability and aesthetics. UTILITY MODEL CONTENT

[0006] In view of the problems in the prior art, the purpose of the embodiments of the utility model is to provide a laser emission device for laser lighting, which aims at solving the problems of high cost, complex structure and large volume in the prior art.

[0007] In order to achieve the above purpose, the embodiments of the utility model provide the following technical scheme:

[0008] A laser emitting device for a laser cigarette lighter, comprising a laser, a plano-convex lens, a window glass, a copper substrate and a heat sink; the plano-convex lens is mounted on the laser, the plano-convex lens comprises a cylindrical section and a spherical section, the spherical section is located at the upper end face of the cylindrical section, the lower end face of the cylindrical section is in close contact with the top surface of the laser, and the window glass is mounted on the upper side of the spherical section; the laser is a semiconductor laser capable of emitting a solid spot, the laser is mounted on the copper substrate, and the copper substrate is fixed on the heat sink.

[0009] Optionally, the plano-convex lens is attached to the semiconductor laser.

[0010] Optionally, the laser is a vertical cavity surface emitting semiconductor laser using a 5050 package, the laser power is greater than 1W, and the laser wavelength is 808nm, 850nm or 940nm.

[0011] Optionally, the plano-convex lens is a spherical lens, and the glass material is K9 or BK7, H-ZF1.

[0012] Optionally, the aperture of the plano-convex lens is 4.7mm, the thickness is 4mm, and the convex curvature radius is 3mm.

[0013] Optionally, the laser is shaped by the lens and emitted to the ignition position through the window glass, and the distance between the ignition position and the laser emitting window can be set to 3mm-10mm.

[0014] Optionally, by changing the convex curvature radius of the plano-convex lens, the position of the laser ignition point can be changed to adapt to different cigarette lighter structures without changing the installation position of the lens.

[0015] Optionally, the plano-convex lens is packaged on the semiconductor laser, and when packaging, the position of the ignition point can be adjusted by adjusting the distance between the plano-convex lens and the laser light emitting surface, so as to optimize the structure size of the laser cigarette lighter.

[0016] Optionally, the plano-convex lens is a plano-convex cylindrical lens.

[0017] Optionally, the copper substrate is a thermoelectrically separated copper substrate, and the surface area is greater than 100mm 2 .

[0018] Optionally, the heat sink is a needle-shaped heat sink structure, comprising a base, and a needle column is arranged on the base.

[0019] Optionally, the surface size of the copper heat sink is greater than 200mm 2 , and the thickness of the base is greater than 1mm.

[0020] Optionally, the height of the needle column is 5mm, and the number of needle columns is 64.

[0021] The one or more technical solutions provided in the embodiments of the utility model have at least the following technical effects or advantages:

[0022] The laser emitting device is directly installed above the laser by adopting the spherical plano-convex lens, the position of the cigarette lighter point can be changed by changing the curvature radius of the convex surface of the lens without changing the installation position of the lens, the structure complexity is greatly reduced, the manufacturing cost is reduced, the size of the cigarette lighter is reduced, the cigarette lighting effect and cost performance are improved by using the characteristics of the solid light spot.

[0023] The advantages of the additional aspects of the utility model will be given in the following description, some of which will become apparent from the following description or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and their descriptions serve to explain the utility model, and do not constitute improper limitation on the utility model. In addition, the mutual distance or size is exaggerated for showing the position of each component, and the schematic diagram is only used for illustration.

[0025] Figure 1 is the schematic diagram of the laser emitting device provided by the embodiments of the utility model;

[0026] Figure 2 is the schematic diagram of the laser cigarette lighter provided by the embodiments of the utility model;

[0027] In the drawing: 1, heat dissipation fin; 2, laser; 3, window glass; 4, ignition position; 5, cigarette; 6, plano-convex lens; 7, copper substrate; 8, laser emitting device; 9, shell; DETAILED DESCRIPTION

[0028] It should be pointed out that the following detailed description is all exemplary, and aims at providing further explanation of the utility model. Unless otherwise specified, all the technical and scientific terms used in the utility model have the same meaning as that understood by the ordinary technical personnel in the technical field to which the utility model belongs. In addition, it should be understood that when the terms 'contain' and / or 'include' are used in the specification, the presence of the features, steps, operations, devices, components and / or their combinations is indicated.

[0029] As Figure 1As shown, the embodiment proposes a laser emitting device 8 for a laser cigarette lighter, including a laser 2, a plano-convex lens 6, a window glass 3, a copper substrate 7 and a heat sink 1. The plano-convex lens 6 is encapsulated on the laser 2, and the plano-convex lens 6 includes a cylindrical section and a spherical section, the spherical section is located on the upper end face of the cylindrical section, the lower end face of the cylindrical section is encapsulated on the top surface of the laser 2, and the window glass 3 is installed on the upper side of the spherical section. The laser 2 is a semiconductor laser 2 capable of emitting a solid spot, the laser 2 is installed on the copper substrate 7, and the copper substrate 7 is fixed on the heat sink 1.

[0030] The plano-convex lens 6 has two main structural parts: a cylindrical section and a spherical section. The lower end face of the plano-convex lens 6 is a plane, which is tightly attached to the top surface of the laser 2 to ensure that the laser beam emitted from the laser 2 can be effectively shaped by the plano-convex lens 6. The upper end face of the plano-convex lens 6 is a spherical section, which allows the light beam to be emitted through the window glass 3 to the cigarette lighting position. The window glass 3 is installed on the upper side of the plano-convex lens 6, mainly used to isolate the external environment, and at the same time protect the laser light path system from pollution. The material of the window glass 3 should have high transparency and be able to withstand high-intensity laser beams. The shaped laser beam is emitted through the cigarette lighter window glass 3 for lighting a cigarette 5.

[0031] Due to the large spherical plano-convex lens aberration, compared with the semiconductor laser emitting non-solid spot, it cannot be collimated by ordinary spherical plano-convex spherical lens, the energy cannot be concentrated, and it is difficult to achieve ignition. The embodiment adopts a semiconductor laser emitting a solid spot, which can be collimated by an ordinary spherical plano-convex lens 6 to ignite. In addition, using a plano-convex cylindrical lens can also achieve good cigarette lighting effect, and it can also be encapsulated on a vertical cavity surface emitting semiconductor laser to collimate the laser emitting spot into a linear laser spot for cigarette lighting.

[0032] The copper substrate 7 serves as the support base for the laser 2 and other components, and can quickly conduct the heat generated by the laser 2 through its good thermal conductivity, preventing the laser 2 from overheating. The copper substrate 7 is fixed with a heat sink 1 below.

[0033] The plano-convex lens 6 is tack-welded on the thermoelectrically separated copper substrate 7 to ensure its stability. The tack-welding technology ensures the precise positioning of the lens, while avoiding the mechanical stress changes that may occur with traditional screw fixing methods, thereby avoiding affecting the optical performance. By direct tack-welding, the lens and the laser 2 are tightly fitted to achieve the best laser beam shaping effect.

[0034] The laser 2 is a vertical cavity surface emitting semiconductor laser 2, the laser power is 2W, the laser wavelength is 850nm or 940nm, and the laser 2 is packaged in a 5050 package. There are many differences and reasons between the solid spot and the non-solid spot of the vertical cavity surface emitting semiconductor laser 2, as follows:

[0035] a. Different light intensity distribution

[0036] Solid spot: The light intensity is relatively uniform and strong in the center area of the spot, gradually weakening from the center to the edge, but there is no obvious light intensity zero point or dark area as a whole, showing a relatively continuous light intensity distribution. Non-solid spot: The light intensity distribution is uneven, there is an obvious light intensity zero point or dark area, and it may present a ring shape, a multi-petal shape or other complex shapes, and the light intensity in the center area may be weak or even zero.

[0037] b. Different spot shapes

[0038] Solid spot: Usually circular or approximately circular, the shape is relatively regular, the boundary is relatively clear, and the diameter of the spot can be accurately determined by optical measurement means. Non-solid spot: The shape is more complex and diverse, in addition to the ring shape, it may also appear irregular shapes such as elliptical, dumbbell, petal, etc., and its boundary is often not so clear, and more complex measurement and analysis methods are needed to determine the size and shape of the spot.

[0039] c. Different beam qualities

[0040] Solid spot: Generally has good beam quality, such as small divergence angle, high beam pointing stability and spatial coherence, etc., the attenuation of light intensity is relatively slow during propagation, and good focusing performance can be maintained. Non-solid spot: The beam quality is relatively poor, the divergence angle may be large, the beam pointing stability and spatial coherence may also be low, and the attenuation of light intensity is fast during propagation, making it difficult to achieve good focusing.

[0041] d. Different causes

[0042] Solid spot: When the optical resonator of a vertical-cavity surface-emitting semiconductor laser is designed properly, it can achieve single transverse mode or low-order transverse mode oscillation. The light field distribution in the cavity is relatively uniform and concentrated in the central region, so that a solid spot is formed when the light is emitted. For example, by optimizing the length of the resonator, the reflectivity of the mirrors, and the refractive index of the medium in the cavity, etc., the laser can work in the fundamental transverse mode state, producing a solid spot. Non-solid spot: If the design of the optical resonator is flawed or disturbed by external factors, it may lead to high-order transverse mode or multimode oscillation in the cavity. The interference and superposition between these high-order transverse modes or multimodes will make the light field distribution complex, resulting in a non-solid spot. For example, uneven size of the resonator, insufficient surface flatness of the mirrors, or slight tilt, etc., may cause multimode oscillation.

[0043] Solid spot: In ideal conditions, current can be uniformly injected into the active region, making the carrier distribution in the active region uniform, and thus producing uniform stimulated radiation to form a solid spot. For example, using good electrode design and ohmic contact process can ensure uniform current injection in the active region. Non-solid spot: When the current injection is not uniform, the carrier concentration at different positions in the active region is different, leading to inconsistent intensity and phase of stimulated radiation, thus producing a non-solid spot. For example, poor contact between the electrode and the active region, local defects or impurities in the active region, etc., may cause uneven current injection.

[0044] Solid spot: The uniformity and quality of the gain medium also have important influence on the formation of the spot. If the composition, thickness and optical properties of the gain medium are uniform and consistent, it can provide stable optical gain, which is conducive to the formation of a solid spot. For example, when growing the gain medium film, using precise epitaxial growth technology can ensure the uniformity of the gain medium. Non-solid spot: The non-uniformity in the gain medium, such as fluctuations in composition, presence of defects or changes in thickness, etc., will cause uneven absorption, scattering and gain of light in the gain medium when propagating, thus affecting the distribution of light field and producing a non-solid spot. For example, impurity atoms or lattice defects in the gain medium may cause local light absorption and scattering, destroying the uniformity of the light field.

[0045] The glass material of the plano-convex lens 6 uses K9 or BK7, H-ZF1, etc. high-quality optical glass. These materials have low optical dispersion and high transparency, which helps to ensure efficient transmission and focusing of the laser beam. K9 glass, as a commonly used optical lens material, is widely used in various optical systems, and its excellent physical and chemical properties ensure the stable performance of the system during long-term use.

[0046] The plano-convex lens 6 has an aperture of 4.7mm and a thickness of 4mm, with a convex curvature radius of 3mm. The lens thickness and convex curvature radius can be adjusted according to the distance of the cigarette lighter, to change the position of the lighter distance from the laser emission window, preventing the cigarette 5 from contaminating the emission window. By increasing the convex curvature of the plano-convex lens 6, the distance of the lighter from the laser emission window can be increased.

[0047] The laser is shaped by the lens and emitted through the window glass 3 to the ignition position 4, which is 6-8mm away from the laser emission window 6. This distance is carefully calculated and tested to ensure that the laser has enough energy to ignite the tobacco of the cigarette 5 within this distance, while avoiding contamination of the laser 2 window. By adjusting the convex curvature radius of the plano-convex lens 6, the distance of the ignition position 4 can be changed to meet different needs. For example, if the distance of the lighter from the laser window needs to be increased, the convex curvature radius of the laser lens can be increased.

[0048] The copper substrate 7 is 12mm*12mm in size, ensuring sufficient support area to fix the laser 2 and other optical components. The copper substrate 7 of this size has good heat dissipation effect, which can effectively conduct the heat generated by the laser 2, preventing the laser 2 from being damaged due to overheating. In addition, the size of the copper substrate 7 balances the volume and stability of the overall device.

[0049] The heat sink 1 is a needle-shaped heat sink 1 structure, including a base on which a needle column is arranged. The needle-shaped heat sink 1 structure can significantly increase the heat dissipation area and maximize the heat dissipation efficiency, which helps the laser 2 to work efficiently for a long time.

[0050] The copper heat sink 1 has a surface size of 20mm*20mm, a base thickness of 2mm, and a needle column height of 5mm, with 64 needle columns. This structure design enables the heat sink 1 to better contact with the environment air, enhancing the heat exchange capacity. Through reasonable heat dissipation design, the working temperature of the laser 2 can be effectively reduced, prolonging its service life.

[0051] Based on the above laser emission device 8, the embodiment also provides a laser cigarette lighter, as shown in Figure 2 As shown, it includes a housing 9 and a laser emission device 8, which is installed in the housing 9. The main function of the housing 9 is to protect the internal laser emission device 8 and provide an external interface for easy operation. The design of the housing 9 should ensure that the laser emission device 8 can be stably fixed and has good heat dissipation conditions. The installation position of the laser emission device 8 should be accurately adjusted according to actual needs to ensure that the propagation path of the laser beam is not disturbed.

[0052] The utility model discloses above although the specific embodiment of the utility model has been described in conjunction with the drawing, is not the limit of the utility model protection scope, and the person skilled in the art should understand that on the basis of the technical scheme of the utility model, various modifications or deformation that the person skilled in the art can make without paying creative labour is still within the protection scope of the utility model.

Claims

1. A laser emitting device for a laser cigarette lighter, characterized in that, Includes laser, plano-convex lens, window glass, copper substrate and heat sink; The plano-convex lens is mounted on the laser. The plano-convex lens includes a cylindrical section and a spherical section. The spherical section is located on the upper end face of the cylindrical section. The lower end face of the cylindrical section is in close contact with the top surface of the laser. The window glass is mounted on the upper side of the spherical section. The laser is a semiconductor laser capable of emitting a solid light spot. The laser is mounted on the copper substrate, and the copper substrate is fixed on the heat sink.

2. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The plano-convex lens is attached to the semiconductor laser.

3. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The laser is a 5050 packaged vertical cavity surface-emitting semiconductor laser that emits a solid beam, with a laser wavelength of 808nm, 850nm, or 940nm and a laser power greater than 1W.

4. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The glass material of the plano-convex lens is K9, BK7, or H-ZF1.

5. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The plano-convex lens has a diameter of 4.7 mm, a thickness of 4 mm, and a convex surface curvature radius of 3 mm.

6. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, After being shaped by a lens, the laser is emitted through the window glass to the ignition position, which is 3mm-10mm away from the laser emission window.

7. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The copper substrate is thermoelectrically separated and has a surface area greater than 100 mm². 2 .

8. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The heat sink is a pin-shaped heat sink structure, including a base, on which pins are provided, and the surface dimension of the heat sink is greater than 200mm. 2 The thickness of the base is greater than 1mm.

9. The laser emitting device for a laser cigarette lighter as described in claim 1, characterized in that, The plano-convex lens is a plano-convex cylindrical lens.

10. The laser emitting device for a laser cigarette lighter as described in claim 8, characterized in that, The needle column is 5mm high and there are 64 needle columns.

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