Optical lens fixing structure for optoelectronic device

Abstract

The utility model belongs to the technical field of optics, and particularly relates to an optical lens fixing structure for a photoelectronic device, which comprises a support made of kovar alloy and used for supporting and fixing; the base is made of kovar alloy and is welded on the bracket; the first sleeve, the second sleeve and the third sleeve are used for being embedded into an optical lens, the first sleeve is connected with the second sleeve in a clamped mode, the second sleeve is sleeved with the third sleeve, the second sleeve is installed between the first sleeve and the third sleeve, the first sleeve, the second sleeve and the third sleeve are coaxially arranged, and the first sleeve, the second sleeve and the third sleeve are coaxially arranged. The multiple lenses are connected with one another to form a composite lens, and the composite lens is welded to the base. According to the utility model, the problem that the lens structure is changed due to external factors in an adhesive mode is solved, the beneficial effects are that the lens is of a full-metallization structure, and the stability between optoelectronic devices is ensured through welding connection; a heat dissipation layer is arranged and a low-temperature-resistant coating is laid, so that the influence of temperature change on the structure is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of optical technology, and particularly relates to an optical lens fixing structure for optoelectronic devices. Background Art

[0002] For the lens structure in optoelectronic devices, the commonly used fixing method is gluing, which specifically refers to a method of bonding two or more lenses together through a specific adhesive to make them a whole to improve the optical performance of the lens. Lens gluing can greatly reduce the reflection loss between the lens surfaces, improve the transmittance of the optical element, and eliminate the relative displacement between lenses, thereby improving the stability and accuracy of the optical system.

[0003] When the optical lens works in a low-temperature environment, the connection between the lens and the fixing part becomes unstable due to the lower solidification point and viscosity of the adhesive. The lens is also more easily damaged when impacted by external force. In an extremely low-temperature environment, the lens may change shape due to material shrinkage, affecting its focusing effect. When the optical lens works in a high-temperature environment, the adhesive may undergo thermal degradation, resulting in weakened adhesion and reduced elasticity. The adhesive may also release harmful gases or substances at high temperatures, causing pollution to the lens and the surrounding environment. In an extremely high-temperature environment, the lens may accumulate a large amount of heat. If the heat cannot be dissipated in time, the lens may be damaged or its performance may deteriorate.

[0004] According to the applicant's search, the authorized patent with publication number CN103849326A mentioned an adhesive tape for plastic lens molding and a molding method for plastic lens molded products. The lens fixing method includes a method for pasting along the outer peripheral surface of a pair of molds arranged opposite to each other at a specified interval to seal the space formed between the pair of molds, thereby forming a cavity filled with a polymerizable monomer of the plastic lens. The adhesive tape is characterized in that the adhesive tape has a strip-shaped substrate and an adhesive layer for adhering the substrate to the outer peripheral surface of the mold, and the adhesive layer is composed of an adhesive with a silicone adhesive as a main component, (1) the silicone adhesive includes an alkenyl-containing silicone adhesive and a non-alkenyl-containing silicone adhesive, and is composed of (2) the silicone adhesive containing The adhesive composition comprises 50 to 70 parts by weight of an alkenyl-containing silicone adhesive, (3) 30 to 50 parts by weight of the non-alkenyl-containing silicone adhesive, and (4) 0.5 to 1.5 parts by weight of a crosslinking agent and a catalyst relative to the alkenyl-containing silicone adhesive, wherein the adhesive composition comprises (5) 36 to 44 parts by weight of polyorganosiloxane gum (G) and (6) 56 to 64 parts by weight of silicone resin (R) in the silicone adhesive, (7) the 70°C retention strength of the adhesive tape is not less than 50 minutes and not more than 500 minutes, and (8) the adhesive strength is not less than 2.0 N / 10 mm and not more than 6.0 N / 10 mm.

[0005] In the prior art represented by the above patents, there are at least the following problems:

[0006] The gluing method will produce stress changes after passing through high and low temperatures, causing the lens structure to shift, thereby causing the optical path to change, and then the performance of the entire device to change. Utility Model Content

[0007] The utility model provides an optical lens fixing structure for optoelectronic devices, which is used to solve the technical problem that the lens structure changes due to external factors in an adhesive method.

[0008] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: an optical lens fixing structure for optoelectronic devices, comprising: a bracket made of Kovar alloy, used for supporting and fixing; a base made of Kovar alloy, welded on the bracket, and the bracket and the base are both made of Kovar alloy; a first sleeve, a second sleeve and a third sleeve, used to embed the optical lens, the first sleeve is clamped with the second sleeve, the third sleeve is sleeved on the second sleeve, the second sleeve is installed between the first sleeve and the third sleeve, the first sleeve, the second sleeve and the third sleeve are coaxially arranged and connected to each other to form a composite lens, and the composite lens is welded on the base; a first clamping block is installed on the first sleeve and abuts against the second sleeve; a second clamping block is installed on the third sleeve and abuts against the second sleeve; a pair of first washers are respectively installed at the positions where the first clamping block is connected to the second sleeve; a pair of second washers are respectively installed at the positions where the second clamping block is connected to the second sleeve.

[0009] Furthermore, the bracket includes: a bottom plate, a groove is provided downward in the middle part, and a heat dissipation hole is opened on the groove; ribs are arranged on both sides of the bottom plate and are rectangular parallelepipeds protruding upward, and the inner edge of the rib is flush with the groove.

[0010] Furthermore, the base includes: a fixing block, a surface of which is provided with a groove matching the composite lens; and a heat conducting sheet installed at the bottom of the fixing block.

[0011] Furthermore, the base is installed in the groove and abuts against the inner wall of the groove, the base abuts against the rib to fix the relative position of the base and the bottom plate, and the base and the rib are fixed by welding.

[0012] Furthermore, the bracket and the base are both attached with a nickel-plated coating, and the surface of the base is attached with a low-temperature resistant coating.

[0013] It can be seen from the above technical solution that the beneficial effects of the optical lens fixing structure for optoelectronic devices provided by the utility model are:

[0014] 1. Fully metallized structure, laser welding connection ensures the stability between optoelectronic device parts;

[0015] 2. Reduce the impact of temperature changes on fixed structures by setting up heat dissipation and applying low-temperature resistant coatings;

[0016] 3. Use welding connection to reduce the use of volatile substances in the gluing method and ensure the light output stability inside the optoelectronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a fixing structure of an optical lens for an optoelectronic device provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the structure of a composite lens provided in an embodiment of the utility model;

[0020] Figure 3 For along Figure 2 The cross-sectional view is obtained after cutting along the AA path;

[0021] Figure 4 A schematic diagram of a support structure provided by an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the base structure provided by an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the welding sequence of the points to be welded provided in an embodiment of the utility model.

[0024] In the figure: 1- bracket; 2- base; 3- first sleeve; 4- second sleeve; 5- third sleeve; 6- compound lens; 7- first clamping block; 8- second clamping block; 9- first gasket; 10- second gasket; 601- gasket; 101- bottom plate; 102- edge bar; 103- groove; 104- heat dissipation hole; 201- fixed block; 202- heat conductive sheet. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Example:

[0030] In order to solve the above technical problems, this embodiment provides an optical lens fixing structure for an optoelectronic device, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: a bracket 1 made of Kovar alloy, used for supporting and fixing; a base 2 made of Kovar alloy, welded to the bracket 1, and the bracket 1 and the base 2 are both made of Kovar alloy; a first sleeve 3, a second sleeve 4 and a third sleeve 5, used for embedding an optical lens, the first sleeve 3 is clamped with the second sleeve 4, the third sleeve 5 is sleeved on the second sleeve 4, the second sleeve 4 is installed between the first sleeve 3 and the third sleeve 5, the first sleeve 3, the second sleeve 4 and the third sleeve 5 are coaxially arranged and connected to each other to form a composite lens 6, and the composite lens 6 is welded to the base 2; a first clamping block 7, installed on the first sleeve 3, and abutted against the second sleeve 4; a second clamping block 8, installed on the third sleeve 5, and abutted against the second sleeve 4; a pair of first washers 9, respectively installed at the positions where the first clamping block 7 and the second sleeve 4 are connected; a second washer 10, installed at the position where the second clamping block 8 and the second sleeve 4 are connected.

[0031] Among them, the bracket 1 and the base 2 are both made of Kovar alloy. The lens embedded in the first sleeve 3 is a collimating lens, which is used to focus non-parallel light to the same point. The lens embedded in the second sleeve 4 is an isolation lens, which is used to ensure the spacing between the two lenses. The lens embedded in the third sleeve 5 is a focusing lens, which has the characteristics of cross-sectional focusing and imaging. The first sleeve 3, the second sleeve 4 and the third sleeve 5 are arranged in parallel and connected in sequence to form a composite lens 6, which can avoid errors in imaging results caused by installation angle deviation. The composite lens 6 is welded on the base 2. As shown in the figure, there are 4 welding areas on one side and 8 on both sides. The spot welding method is adopted, which has a short heating time for the connection area, a fast welding speed, will not affect the optical lens, and the welding is stable. The welding quality is good; the first clamping block 7 is installed on the first sleeve 3, and the first sleeve 3 is connected to the second sleeve 4 through the first clamping block 7. The second clamping block 8 is installed on the third sleeve 5, and the third sleeve 5 is connected to the second sleeve 4 through the second clamping block 8.

[0032] Further, in some implementations of this embodiment, if Figure 4 As shown, the bracket 1 includes: a bottom plate 101, a groove 103 is provided downward in the middle part, and a heat dissipation hole 104 is opened on the groove 103; ribs 102 are arranged on both sides of the bottom plate 101, and are rectangular parallelepipeds protruding upward, and the inner edge of the rib 102 is flush with the groove 103.

[0033] Among them, the ribs 102 leave a distance inward along the short side of the bottom plate 101, and are then arranged along the long side of the bottom plate 101. The distance between the inner sides of the two ribs 102 is consistent with the short side of the base 2. The groove 103 leaves a distance inward along the short side of the bottom plate 101, and the long side is flush with the inner side of the ribs 102 and grooved downward. A heat dissipation hole 104 is opened on the groove 103.

[0034] Further, in some implementations of this embodiment, if Figure 5 As shown, the base 2 includes: a fixing block 201 with a groove on the surface thereof matching the composite lens 6 ; and a heat conducting sheet 202 installed at the bottom of the fixing block 201 .

[0035] The shape of the groove on the fixing block 201 matches the composite lens 6 , and the composite lens 6 is installed in the groove and connected to the fixing block 201 by welding.

[0036] Further, in some implementations of this embodiment, if Figure 1 and Figure 4 As shown, the base 2 is installed in the groove 103 and abuts against the inner wall of the groove 103. The base 2 abuts against the rib 102 to fix the relative position of the base 2 and the bottom plate 101. The base 2 and the rib 102 are fixed by welding.

[0037] The base 2 can be moved on the groove 103 to adjust the installation position, and then connected to the rib 102 by welding technology, such as Figure 1 As shown, there are 3 welding areas on one side and 6 welding areas on both sides, which can more accurately control the relative positions of the lenses.

[0038] Further, in some implementations of this embodiment, if Figure 1 As shown, the bracket 1 and the base 2 are both coated with nickel, and the surface of the base 2 is coated with a low-temperature resistant coating.

[0039] The nickel-plated coating can provide corrosion resistance for the surfaces of the bracket 1 and the base 2, and the low-temperature-resistant coating can prevent the base 2 from cracking in a low-temperature environment.

[0040] In addition, such as Figure 1 and Figure 6 As shown, four welding points are defined on each side of the welding area between the composite lens 6 and the base 2, namely A, C, E, and G. Three welding points are defined on each side of the welding area between the base 2 and the bracket 1, namely B, D, and F. The welding order of these welding points is as follows: Figure 6 As shown, welding is performed from A to G, and each welding point is welded at staggered intervals to avoid heat accumulation caused by continuous electric welding between adjacent welding points, while ensuring high welding quality and good air tightness.

[0041] In summary, in the fixing structure of the optical lens for optoelectronic devices, first, the first sleeve 3, the second sleeve 4 and the third sleeve 5 are arranged parallel to each other and then connected to form a composite lens 6, the composite lens 6 is welded on the base 2, a heat conducting sheet 202 is provided below the base 2, the base 2 is welded on the groove 103 of the bracket 1, the groove 103 is provided with a heat dissipation hole 104, the bracket 1 and the base 2 are both attached with a nickel-plated coating, and a low-temperature resistant coating is additionally attached to the surface of the base 2. The fully metallized structure is connected by laser welding to ensure the stability between the optoelectronic device components, reduce the use of organic glue, ensure the light output rate, and set the heat dissipation and low-temperature resistant parts to prevent the optoelectronic device from being affected by external factors.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An optical lens fixing structure for an optoelectronic device, characterized in that: include: A bracket (1) made of Kovar alloy, used for supporting and fixing; A base (2) made of Kovar alloy, welded to the bracket (1); The first sleeve (3), the second sleeve (4) and the third sleeve (5) are used to embed the optical lens; the first sleeve (3) is clamped with the second sleeve (4); the third sleeve (5) is sleeved on the second sleeve (4); the second sleeve (4) is installed between the first sleeve (3) and the third sleeve (5); the first sleeve (3), the second sleeve (4) and the third sleeve (5) are coaxially arranged and mutually connected to form a composite lens (6); the composite lens (6) is welded to the base (2); A first clamping block (7) is mounted on the first sleeve (3) and abuts against the second sleeve (4); A second clamping block (8) is mounted on the third sleeve (5) and abuts against the second sleeve (4); A pair of first washers (9) are respectively installed at the positions where the first clamping block (7) and the second sleeve (4) are connected; A pair of second washers (10) are respectively installed at the positions where the second clamping block (8) is connected to the second sleeve (4).

2. The optical lens fixing structure for optoelectronic devices according to claim 1, characterized in that: The support (1) comprises: A bottom plate (101) has a groove (103) disposed downwardly in the middle portion thereof, and a heat dissipation hole (104) is provided in the groove (103); The ribs (102) are arranged on both sides of the bottom plate (101) and are rectangular parallelepipeds protruding upwards, and the inner edges of the ribs (102) are flush with the grooves (103).

3. The optical lens fixing structure for optoelectronic devices according to claim 1, characterized in that: The base (2) comprises: A fixed block (201) having a groove on its surface that matches the composite lens (6); The heat conducting sheet (202) is installed on the bottom of the fixing block (201).

4. The optical lens fixing structure for optoelectronic devices according to claim 2, characterized in that: The base (2) is installed in the groove (103) and abuts against the inner wall of the groove (103); the base (2) abuts against the rib (102) to fix the relative position of the base (2) and the bottom plate (101); the base (2) and the rib (102) are fixed by welding.

5. The optical lens fixing structure for optoelectronic devices according to claim 1, characterized in that: The bracket (1) and the base (2) are both provided with a nickel-plated coating, and the surface of the base (2) is provided with a low-temperature-resistant coating.

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