Linear light source device with polarization effect

Abstract

The utility model discloses a linear light source device with polarization effect relates to in the technical field of detection light source, linear light source device with polarization effect includes seat body, light emitting part, diffusion plate, polarizing plate spare and first heat dissipation fan, the top of first cavity and the bottom of second cavity intercommunication arrangement, air inlet and air outlet are respectively with the both sides of second cavity intercommunication arrangement, polarizing plate spare sets up at the light outlet, and the polaroid is set up between two transparent plates, and two transparent plates are respectively with the top and bottom end of polaroid abut, and first heat dissipation fan sets up two, and sets up respectively at air inlet and air outlet place. Two transparent plates pinch the polaroid, can reduce the degree of polaroid and appear warping deformation because of temperature too high, and two first heat dissipation fans can make the air of outside from air inlet flow into second cavity, so that the air of outside temperature lower can contact with the inner wall of second cavity, diffusion plate and polarizing plate spare, reduce the temperature of polarizing plate spare.

Description

Technical Field

[0001] This utility model relates to the field of detection light source technology, and in particular to a linear light source device with polarization effect. Background Technology

[0002] In the field of machine vision, it is usually necessary to use a light source to illuminate the product when inspecting its appearance. Among them, line scan light sources are widely used in machine vision inspection.

[0003] Existing line scan light sources can have polarizers installed at the light output channel. Conventional polarizers are thin films, which are acceptable in environments with low heat generation. However, since the light source structure of line scan light sources is usually a high-brightness and densely arranged LED, the light source structure emits high brightness during operation, but also dissipates a lot of heat. During long-term operation of the line scan light source, the polarizer will receive heat from the light source structure and its temperature will rise. It is prone to warping and deformation due to excessive temperature, which will affect the polarization effect of the polarizer. Furthermore, the polarizer will be damaged when it is in a high-temperature state for a long time, resulting in a decrease in polarization efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a linear light source device with polarization effect, which can reduce the degree of warping deformation of the polarizer due to excessive temperature, reduce the temperature of the polarizing plate, and reduce the degree of damage to the polarizer due to excessive temperature.

[0005] To achieve the above objectives, this utility model provides a linear light source device with polarization effect. The linear light source device with polarization effect includes a base, a light-emitting element, a diffuser plate, a polarizing plate, and a first cooling fan. The base is provided with a first cavity, a second cavity, an air inlet, an air outlet, and a light outlet. The light outlet is located at the top of the base and communicates with the top of the second cavity. The first cavity is located below the second cavity, and the top of the first cavity communicates with the bottom of the second cavity. Both the first cavity and the second cavity extend along a first horizontal direction. The air inlet and the air outlet are respectively located at opposite ends of the base along the first horizontal direction and communicate with the sides of the second cavity. The light-emitting element is disposed within the first cavity. The diffuser plate is located between the first cavity and the second cavity. Between the cavities; the diffuser plate is connected to the base; a polarizing plate is disposed at the light outlet; the polarizing plate is connected to the base; the polarizing plate includes a transparent plate and a polarizer; two transparent plates are disposed, arranged opposite each other and spaced apart in the vertical direction; the polarizer is disposed between the two transparent plates; the two transparent plates abut against the top and bottom ends of the polarizer respectively; wherein, the first horizontal direction and the vertical direction are perpendicular to each other; a first cooling fan is connected to the base; two first cooling fans are disposed, respectively at the air inlet and the air outlet; the first cooling fan disposed at the air inlet can input air from the air inlet into the second cavity, and the first cooling fan disposed at the air outlet can exhaust air from the second cavity from the air outlet.

[0006] Furthermore, the cross-sectional size of the polarizing plate is greater than or equal to the cross-sectional size of the light outlet.

[0007] Furthermore, the cross-sectional size of the transparent plate is greater than or equal to the cross-sectional size of the polarizer.

[0008] Furthermore, the base includes end plates and a main body; the main body is provided with a through groove that extends along the first horizontal direction; two end plates are provided and are respectively provided at the two ends of the main body along the first horizontal direction, and the two end plates are respectively covered at the two openings of the through groove to define the first cavity, the second cavity and the light outlet with the through groove; the air inlet and the air outlet are respectively provided on the two end plates and are both connected to the through groove; the light-emitting element is connected to the main body.

[0009] Furthermore, the main body is provided with a first receiving groove; there are two first receiving grooves, both of which are located between the first cavity and the second cavity, and are arranged opposite to each other and spaced apart along the second horizontal direction; the two ends of the diffuser plate along the second horizontal direction are respectively located in the two first receiving grooves; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0010] Furthermore, the diffuser plate abuts against the two end plates at both ends along the first horizontal direction, and the diffuser plate is configured to separate the first cavity from the second cavity.

[0011] Furthermore, the main body is provided with a second receiving groove; there are two second receiving grooves, both of which are located at the light outlet and are arranged opposite to each other and spaced apart along the second horizontal direction; the two ends of the polarizing plate are respectively located in the two second receiving grooves along the second horizontal direction; wherein the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0012] Furthermore, a third receiving groove is provided on each of the two opposite end faces of the two end plates, and the two ends of the polarizing plate along the first horizontal direction are respectively disposed in the two third receiving grooves.

[0013] Furthermore, the length direction of the seat is aligned with the first horizontal direction, and a heat dissipation block is provided at the bottom of the seat, extending along the first horizontal direction; multiple heat dissipation blocks are provided and arranged at intervals along the second horizontal direction; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0014] Furthermore, it also includes a second cooling fan; the second cooling fan is disposed at the bottom of the base and faces the heat sink.

[0015] Compared with the prior art, the present invention has the following advantages: 1. In the embodiment of the present invention, the light-emitting element can emit light. The light emitted by the light-emitting element needs to pass through the diffuser plate, then through the second cavity, and then through the polarizing plate to be emitted outward. The polarizing plate polarizes the light emitted by the light-emitting element through the polarizer. The polarizing plate is composed of a polarizer and two transparent plates. The polarizer is placed between the two transparent plates, and the top and bottom ends of the polarizer abut against the two transparent plates respectively, so that the polarizer can be clamped by the two transparent plates to control the position of the polarizer. It can also reduce the degree of warping deformation of the polarizer due to excessive temperature, maintain the structure of the polarizer, and ensure the polarization effect of the polarizer.

[0016] 2. The light-emitting component generates heat during operation. The light-emitting port is connected to the top of the second cavity. The polarizing plate is located at the light-emitting port, while two first cooling fans are located at the air inlet and air outlet, respectively. Through the cooperation of the two first cooling fans, outside air can flow into the second cavity from the air inlet, allowing the cooler outside air to come into contact with the inner wall of the second cavity, the diffuser plate, and the polarizing plate, thereby removing heat from the base and the polarizing plate, reducing the temperature of the polarizing plate, minimizing damage to the polarizer due to excessive temperature, and ensuring the polarization efficiency and stability of the polarizer. The first cavity extends along the first horizontal direction, while the air inlet and air outlet are located on opposite sides of the base along the first horizontal direction, allowing the air to flow a longer distance within the second cavity, thus ensuring effective heat dissipation for the polarizing plate. Attached Figure Description

[0017] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the linear light source device with polarization effect according to this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the linear light source device with polarization effect of this utility model from another perspective;

[0020] Figure 3 This is a cross-sectional view of the linear light source device with polarization effect according to this utility model;

[0021] Figure 4 This is a cross-sectional view of the end plate and main body of the linear light source device with polarization effect according to this utility model.

[0022] Figure 5 This is another cross-sectional view of the end plate and main body of the linear light source device with polarization effect of this utility model;

[0023] Figure label:

[0024] Base 100; First cavity 101; Second cavity 102; Air inlet 103; Air outlet 104; Light outlet 105; End plate 110; Main body 120; First receiving groove 121; Second receiving groove 122; Third receiving groove 123; Through groove 124; Heat sink 130; Second cooling fan 140; Light emitting element 200; Diffuser plate 300; Polarizing plate 400; Transparent plate 410; Polarizing film 420; First cooling fan 500. Detailed Implementation

[0025] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0028] like Figures 1 to 5As shown, the linear light source device with polarization effect according to an embodiment of the present invention includes a base 100, a light-emitting element 200, a diffuser plate 300, a polarizing plate 400, and a first cooling fan 500; the base 100 is provided with a first cavity 101, a second cavity 102, an air inlet 103, an air outlet 104, and a light outlet 105; the light outlet 105 is disposed at the top of the base 100 and communicates with the top of the second cavity 102. The first cavity 101 is located below the second cavity 102, and the top of the first cavity 101 is connected to the bottom of the second cavity 102; both the first cavity 101 and the second cavity 102 extend along a first horizontal direction; the air inlet 103 and the air outlet 104 are respectively located on opposite sides of the base 100 along the first horizontal direction, and are respectively connected to the two sides of the second cavity 102; the light-emitting element 200 is disposed in the first cavity 101; the diffuser plate 300 is located in the first cavity 102. Between 01 and the second cavity 102; the diffuser plate 300 is connected to the base 100; the polarizing plate 400 is disposed at the light outlet 105; the polarizing plate 400 is connected to the base 100; the polarizing plate 400 includes a transparent plate 410 and a polarizer 420; two transparent plates 410 are disposed, and are arranged opposite each other and spaced apart in the vertical direction; the polarizer 420 is disposed between the two transparent plates 410; the two transparent plates 410 abut against the top and bottom ends of the polarizer 420 respectively; wherein The first horizontal direction and the first vertical direction are perpendicular to each other; the first cooling fan 500 is connected to the base 100; there are two first cooling fans 500, which are respectively set at the air inlet 103 and the air outlet 104; the first cooling fan 500 set at the air inlet 103 can input air from the air inlet 103 into the second cavity 102, and the first cooling fan 500 set at the air outlet 104 can exhaust the air in the second cavity 102 from the air outlet 104.

[0029] 1. In this embodiment of the utility model, the light-emitting element 200 can emit light. The light emitted by the light-emitting element 200 needs to pass through the diffuser plate 300, then through the second cavity 102, and then through the polarizing plate 400 to be emitted outward. The polarizing plate 400 polarizes the light emitted by the light-emitting element 200 through the polarizer 420. The polarizing plate 400 is composed of the polarizer 420 and two transparent plates 410. The polarizer 420 is disposed between the two transparent plates 410, and the top and bottom ends of the polarizer 420 abut against the two transparent plates 410 respectively, so that the polarizer 420 can be clamped by the two transparent plates 410 to control the position of the polarizer 420, and to reduce the degree of warping deformation of the polarizer 420 due to excessive temperature, maintain the structure of the polarizer 420, and ensure the polarization effect of the polarizer 420.

[0030] 2. The light-emitting element 200 emits heat during operation. The light-emitting port 105 is connected to the top of the second cavity 102. The polarizing plate 400 is located at the light-emitting port 105. Two first cooling fans 500 are respectively located at the air inlet 103 and the air outlet 104. Through the cooperation of the two first cooling fans 500, outside air can flow into the second cavity 102 from the air inlet 103, so that the cooler outside air can interact with the inner wall of the second cavity 102, the diffuser plate 300, and the polarizing plate 400. The air inlet 103 and outlet 104 are arranged along the first horizontal direction, while the air inlet 103 and outlet 104 are arranged along the first horizontal direction on opposite sides of the base 100, so that the air can flow a longer distance in the second cavity 102, thereby ensuring the heat dissipation effect on the polarizing plate 400.

[0031] Reference Figure 3 In some embodiments of this utility model, the cross-sectional size of the polarizing plate 400 is greater than or equal to the cross-sectional size of the light outlet 105, so that the light emitted by the light-emitting element 200 needs to pass through the polarizer 420 of the polarizing plate 400 before being emitted outward, thus ensuring the polarization effect.

[0032] Specifically, the polarizing plate 400 is placed over the light outlet 105 and covers the light outlet 105.

[0033] Reference Figure 3 In some embodiments of this utility model, the cross-sectional size of the transparent plate 410 is greater than or equal to the cross-sectional size of the polarizer 420, so as to ensure the effect of clamping the polarizer 420 by the two transparent plates 410 and to maintain the stability of the polarizer 420 structure.

[0034] Specifically, the cross-sectional size of the transparent plate 410 is equal to the cross-sectional size of the polarizer 420. The two transparent plates 410 are fully attached to the top and bottom surfaces of the polarizer 420, respectively, to reduce the degree of warping and deformation of the polarizer 420.

[0035] Specifically, the transparent plate 410 can be a glass plate.

[0036] Reference Figure 1 , Figure 4 and Figure 5In some embodiments of this utility model, the base 100 includes an end plate 110 and a main body 120; the main body 120 is provided with a through groove 124 that runs through the first horizontal direction; two end plates 110 are provided and are respectively provided at the two ends of the main body 120 along the first horizontal direction, and the two end plates 110 are respectively covered at the two openings of the through groove 124 to define a first cavity 101, a second cavity 102 and a light outlet 105 with the through groove 124; an air inlet 103 and an air outlet 104 are respectively provided on the two end plates 110 and are both connected to the through groove 124; the light-emitting element 200 is connected to the main body 120.

[0037] The first cavity 101, the second cavity 102, and the light outlet 105 are defined between the main body 120 and the end plate 110, which allows the light-emitting element 200, the diffuser plate 300, and the polarizing plate 400 to be installed from the opening of the through slot 124 into the through slot 124, thereby reducing the difficulty of installing and removing the light-emitting element 200, the diffuser plate 300, and the polarizing plate 400.

[0038] The air inlet 103 and the air outlet 104 are respectively disposed on the two end plates 110. The two first cooling fans 500 are connected to the side of the end plate 110 away from the through slot 124. The two first cooling fans 500 are respectively disposed at the air inlet 103 and the air outlet 104. By blowing air in the same direction at the same time, the air from the outside is driven to flow into the second cavity 102 from the air inlet 103 and then flow out from the air outlet 104.

[0039] Reference Figure 4 and Figure 5 In some embodiments of this utility model, the main body 120 is provided with a first receiving groove 121; there are two first receiving grooves 121, both of which are provided between the first cavity 101 and the second cavity 102, and are arranged opposite to each other and spaced apart along the second horizontal direction; the two ends of the diffuser plate 300 along the second horizontal direction are respectively provided in the two first receiving grooves 121; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0040] Two first receiving grooves 121 are respectively disposed on the two opposite inner side walls of the through groove 124. The first receiving grooves 121 can limit the position of the diffuser plate 300 relative to the seat 100, thereby improving the stability of the operation.

[0041] Specifically, the first receiving groove 121 extends through the first horizontal direction; the first receiving groove 121 abuts against the top and bottom surfaces of the diffuser plate 300 to limit the position of the diffuser plate 300 in the vertical direction.

[0042] Reference Figure 3In some embodiments of this utility model, the two ends of the diffuser plate 300 along the first horizontal direction respectively abut against the two end plates 110, so as to limit the position of the diffuser plate 300 relative to the base 100 and improve the stability of operation.

[0043] The diffuser plate 300 is configured to separate the first cavity 101 and the second cavity 102, so as to ensure that the light emitted by the light-emitting element 200 passes through the diffuser plate 300 and then enters the second cavity 102. The diffuser plate 300 can also prevent the air flowing in the second cavity 102 from entering the first cavity 101, thus ensuring the heat dissipation effect on the inner wall of the second cavity 102 and the polarizing plate 400.

[0044] Each of the two end plates 110 has a third receiving groove 123 on its opposite end face, and the two ends of the polarizing plate 400 along the first horizontal direction are respectively disposed in the two third receiving grooves 123.

[0045] Reference Figure 4 and Figure 5 In some embodiments of this utility model, the main body 120 is provided with a second receiving groove 122; there are two second receiving grooves 122, both of which are located at the light outlet 105 and are arranged opposite to each other and spaced apart along the second horizontal direction; the two ends of the polarizing plate 400 along the second horizontal direction are respectively located in the two second receiving grooves 122; wherein the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0046] Two second receiving grooves 122 are respectively disposed on the two opposite inner sidewalls of the through groove 124. The second receiving grooves 122 can limit the position of the polarizing plate 400 relative to the base 100, thereby improving the stability of operation.

[0047] Specifically, the first receiving groove extends through the first horizontal direction; the second receiving groove 122 abuts against the two transparent plates 410 of the polarizing plate 400 so as to limit the position of the polarizing plate 400 in the vertical direction.

[0048] Reference Figure 4 and Figure 5 In some embodiments of this utility model, a third receiving groove 123 is provided on the opposite end faces of the two end plates 110, and the two ends of the polarizing plate 400 along the first horizontal direction are respectively disposed in the two third receiving grooves 123.

[0049] The third receiving groove 123 can limit the position of the polarizing plate 400 relative to the base 100, thereby improving the stability of operation.

[0050] Specifically, the third receiving groove 123 abuts against the side end of the polarizing plate 400 in the first horizontal direction to define the position of the polarizing plate 400 in the first horizontal direction.

[0051] Reference Figures 1 to 3 In some embodiments of this utility model, the length direction of the seat 100 is arranged in the same direction as the first horizontal direction, and a heat dissipation block 130 is provided at the bottom end of the seat 100. The heat dissipation block 130 extends along the first horizontal direction, and multiple heat dissipation blocks 130 are provided and arranged sequentially at intervals along the second horizontal direction; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0052] The heat emitted by the light-emitting element 200 during operation is transferred to the base 100. A heat sink 130 is provided at the bottom of the base 100. By providing the heat sink 130, the heat dissipation effect of the base 100 can be improved, heat can be dissipated, and the temperature of the base 100 can be reduced, thereby reducing the temperature of the polarizing plate 400.

[0053] Reference Figures 1 to 3 In some embodiments of this utility model, a second cooling fan 140 is also included. The second cooling fan 140 is connected to the bottom of the base 100 and is positioned towards the heat sink 130.

[0054] By setting a second cooling fan 140, the heat dissipation effect of the heat sink 130 can be further improved, the temperature of the base 100 can be reduced, and the temperature of the polarizing plate 400 can be reduced.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A linear light source device with polarization effect, characterized in that, include: The base (100) is provided with a first cavity (101), a second cavity (102), an air inlet (103), an air outlet (104), and a light outlet (105); the light outlet (105) is located at the top of the base (100) and communicates with the top of the second cavity (102); the first cavity (101) is located below the second cavity (102), and the top of the first cavity (101) communicates with the bottom of the second cavity (102); both the first cavity (101) and the second cavity (102) extend along a first horizontal direction; the air inlet (103) and the air outlet (104) are respectively located at opposite ends of the base (100) along the first horizontal direction and communicate with the two sides of the second cavity (102); A light-emitting element (200) is disposed within the first cavity (101); A diffuser plate (300) is located between the first cavity (101) and the second cavity (102); the diffuser plate (300) is connected to the base (100); A polarizing plate (400) is disposed at the light outlet (105); the polarizing plate (400) is connected to the base (100); the polarizing plate (400) includes a transparent plate (410) and a polarizer (420); two transparent plates (410) are disposed, and are arranged opposite to each other and spaced apart in the vertical direction; the polarizer (420) is disposed between the two transparent plates (410); the two transparent plates (410) respectively abut against the top and bottom ends of the polarizer (420); Wherein, the first horizontal direction and the vertical direction are arranged perpendicular to each other; The first cooling fan (500) is connected to the base (100); there are two first cooling fans (500), which are respectively located at the air inlet (103) and the air outlet (104); the first cooling fan (500) located at the air inlet (103) can input air from the air inlet (103) into the second cavity (102), and the first cooling fan (500) located at the air outlet (104) can discharge the air in the second cavity (102) from the air outlet (104).

2. The linear light source device with polarization effect according to claim 1, characterized in that, The cross-sectional size of the polarizing plate (400) is greater than or equal to the cross-sectional size of the light outlet (105).

3. The linear light source device with polarization effect according to claim 1, characterized in that, The size of the cross-section of the transparent plate (410) is greater than or equal to the size of the cross-section of the polarizer (420).

4. The linear light source device with polarization effect according to claim 1, characterized in that, The base (100) includes an end plate (110) and a main body (120); the main body (120) is provided with a through groove (124) that runs through the first horizontal direction; there are two end plates (110), which are respectively provided at the two ends of the main body (120) along the first horizontal direction, and the two end plates (110) are respectively covered at the two openings of the through groove (124) to define the first cavity (101), the second cavity (102) and the light outlet (105) with the through groove (124); the air inlet (103) and the air outlet (104) are respectively provided on the two end plates (110), and both are connected to the through groove (124); the light-emitting element (200) is connected to the main body (120).

5. The linear light source device with polarization effect according to claim 4, characterized in that, The main body (120) is provided with a first receiving groove (121); there are two first receiving grooves (121), both of which are located between the first cavity (101) and the second cavity (102), and are arranged opposite to each other and spaced apart along the second horizontal direction; the diffuser plate (300) is respectively located in the two first receiving grooves (121) at both ends along the second horizontal direction; wherein the first horizontal direction and the second horizontal direction are perpendicular to each other.

6. The linear light source device with polarization effect according to claim 5, characterized in that, The diffuser plate (300) abuts against the two end plates (110) at both ends along the first horizontal direction, and the diffuser plate (300) is configured to separate the first cavity (101) and the second cavity (102).

7. The linear light source device with polarization effect according to claim 4, characterized in that, The main body (120) is provided with a second receiving groove (122); there are two second receiving grooves (122), both of which are located at the light outlet (105) and are arranged opposite to each other and spaced apart along the second horizontal direction; the two ends of the polarizing plate (400) along the second horizontal direction are respectively located in the two second receiving grooves (122); wherein the first horizontal direction and the second horizontal direction are arranged perpendicular to each other.

8. The linear light source device with polarization effect according to claim 4, characterized in that, A third receiving groove (123) is provided on the opposite end faces of the two end plates (110), and the two ends of the polarizing plate (400) along the first horizontal direction are respectively disposed in the two third receiving grooves (123).

9. The linear light source device with polarization effect according to claim 1, characterized in that, The length direction of the seat (100) is arranged in the same direction as the first horizontal direction. A heat sink (130) is provided at the bottom end of the seat (100). The heat sink (130) extends along the first horizontal direction. Multiple heat sinks (130) are provided and are arranged at intervals along the second horizontal direction. The first horizontal direction and the second horizontal direction are perpendicular to each other.

10. The linear light source device with polarization effect according to claim 9, characterized in that, It also includes a second cooling fan (140); the second cooling fan (140) is disposed at the bottom of the base (100) and is disposed toward the heat sink (130).

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