Light source device with good imaging effect for PCB blind hole detection

Abstract

The utility model provides a light source device with good imaging effect for PCB blind hole detection, which comprises a mounting seat, a coaxial light source module and a side light source module, the coaxial light source module comprises a coaxial luminous body and a lens assembly, the lens assembly comprises more than one first lens and more than one fifth lens, and the side light source module is arranged on the mounting seat. The first lens is arranged on one side of the coaxial illuminant light source, the fifth lens is arranged on the other side of the first lens, the side light source module comprises more than one side light illuminant, the coaxial light source module is arranged on one side of the mounting base, the side light source module is arranged in the middle of the mounting base, and the light emitting efficiency is good.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB detection, and particularly relates to a light source device with good imaging effect for PCB blind hole detection. Background Art

[0002] With the continuous development of social economy, in the electronic manufacturing industry, the requirements for the accuracy and efficiency of PCB blind hole detection are getting higher and higher. And the lighting device is the key factor to ensure the accuracy of PCB blind hole detection. A high-quality lighting device can provide sufficient brightness and uniform illumination, enabling the imaging device to clearly capture the position and shape information of the blind hole, increasing the detection accuracy and reducing the possibility of misjudgment.

[0003] For example, in the patent document with the patent application number 201210582287.4 and the publication date of May 1, 2013, a multi-light source detection device is disclosed. It includes an imaging device, a coaxial light source module for irradiating the central area of the upper surface of the object to be measured, an annular light source module for irradiating the peripheral area of the upper surface of the object to be measured, and a side light source module for irradiating the side surface of the object to be measured. The annular light source module is installed on one side of the object to be measured, and the side light source module is installed on one side of the annular light source module. The coaxial light source module is installed on the other side of the annular light source module. The imaging device is installed on the same side as the coaxial light source module. And a through hole is provided in the middle of the annular light source module to allow the light beam emitted by the coaxial light source module to pass through and enable the imaging device to capture the object to be measured. The signal output end of the imaging device is electrically connected to the signal input end of the image processing device. It can quickly detect the appearance defects of the object to be measured and maintain high detection accuracy. It is an economical, practical, accurate and reliable multi-light source detection device.

[0004] In the above document, a part of the light emitted by the coaxial light-emitting body passes through the optical lens and reaches the object to be measured. When the light from the coaxial light-emitting body reaches the optical lens and has not been focused by the condenser lens, the light will naturally diverge, resulting in a situation where the light intensity is weakened and the distribution is uneven when the light reaches the object to be measured from the optical lens. And the irradiation areas of the coaxial light source module, the side light source module and the annular light source module are all open and unenclosed areas, which are easily affected by the surrounding ambient light, possibly resulting in unstable light intensity and thus affecting the quality and accuracy of image acquisition. The light-emitting bodies used in this document are all LEDs, and no heat dissipation device is provided in the detection device and the LEDs. During long-term use, the light-emitting bodies do not receive proper heat dissipation, which may accelerate material aging and cause the light source intensity to decrease, further reducing the detection efficiency and accuracy, and thus leading to misjudgment. Summary of the Invention

[0005] The present utility model provides a light source device with good imaging effect for PCB blind hole detection, which can prevent the influence of the outside world on the light emitted by the coaxial light source module and improve the light intensity.

[0006] To achieve the above object, the technical solution of the present utility model is: A light source device with good imaging effect for PCB blind hole detection, comprising a mounting base, a coaxial light source module and a side light source module. The coaxial light source module includes a coaxial light emitter and a lens assembly. The coaxial light emitter is arranged on one side of the mounting base. The lens assembly includes more than one first lens and a fifth lens. The first lens and the second lens are symmetrically arranged with respect to the axis of the coaxial light emitter. The first lens is inclined with respect to the coaxial light source module. The fifth lens is inclined with respect to the axis of the coaxial light source module. The side light source module is arranged on the mounting base and is located below the fifth lens. The light emitted by the coaxial light source module is reflected by the first lens and then reflected by the fifth lens onto the object to be measured.

[0007] With the above settings, a coaxial light source module and a side light source module are provided in the light emitting device to provide light in different directions to meet the needs of different objects to be measured. The light emitted by the coaxial light source enters the object to be measured after being reflected by the first lens and the fifth lens. Then the side light source module can illuminate the object to be measured from the side to eliminate shadows. And the coaxial light source module and the side light source module are arranged in a mounting base to form a closed area, which helps to reduce light scattering and external light interference. By using the lens assembly to guide the coaxial light source module, the expected lighting effect can be achieved.

[0008] Further, the lens assembly includes two first lenses. The two first lenses are symmetrically arranged with respect to the axis of the coaxial light source module. One end of the two first lenses is inclined downward and inward towards the coaxial light emitter.

[0009] With the above settings, one end of the two first lenses is inclined towards the coaxial light emitter. The two first lenses form a symmetric inclination angle. When the coaxial light emitter emits light, under the reflection of the two first lenses, the light propagates within the two first lenses to reduce the occurrence of light scattering. The other end of the two first lenses is inclined towards the second lens, so that the light propagates between the second lens and the coaxial light emitter, and the light is concentrated on the fifth lens to enhance the light intensity.

[0010] Further, the lens assembly further includes more than one second lens. The second lens is arranged parallel to the coaxial light source module and is inclined with respect to the first lens.

[0011] With the above settings, by arranging the second lens on one side of the first lens to converge the light emitted by the first lens, the light emitting intensity of the coaxial light source module is improved.

[0012] Furthermore, the mounting base is of a hollow cavity structure. An observation window is provided on the upper surface of the mounting base. A fourth lens is provided on the observation window, and a fifth lens is arranged below the fourth lens, and the fifth lens is inclined with respect to the fourth lens.

[0013] With the above settings, the mounting base is provided with an observation window. Generally, the shooting device is placed above the observation window. The shooting device can shoot the object to be measured through the fourth lens. And a fifth lens is arranged below the fourth lens to reflect a part of the light emitted by the coaxial light emitter. The type of the fifth lens can be set to guide the light to the object to be measured or the imaging device, so that the shooting device can obtain a clearer image.

[0014] Furthermore, mounting holes are oppositely arranged on two side surfaces of the mounting base, and two side light emitters are arranged in the mounting holes.

[0015] With the above settings, mounting holes are provided on the mounting base, and two side light emitters can be obliquely and fixedly arranged in the mounting holes, which is convenient for the installation of the side light emitters.

[0016] Furthermore, the side light emitter includes a side light emitting mounting body. A circuit board is arranged at the lower end of the side light emitting mounting body, and a light source is arranged on the circuit board. A ventilation opening is arranged on the side light emitting mounting body along the length direction of the side light emitting mounting body, and the ventilation opening is connected to an external ventilation device.

[0017] With the above settings, heat will be generated when the side light source module is working. Therefore, a ventilation opening is provided on the side light emitting module. The ventilation opening can be connected to a ventilation device, so that air can flow in from one ventilation opening on one side of the side light emitting module and flow out from the other ventilation opening, and rapid air flow is generated in the side light emitting module. The heat transfer is accelerated by the air flow, so as to complete the cooling process of the side light emitting module.

[0018] Furthermore, mounting pieces are arranged on the side edges of the side light emitting mounting body, and the mounting pieces are connected to the outer side wall of the mounting base.

[0019] With the above settings, it is convenient to install the side light source module on the outer side wall of the mounting base.

[0020] Furthermore, the fifth lens is a semi-transparent and semi-reflective lens.

[0021] With the above settings, side light emitters are arranged below the coaxial light reflected by the semi-transparent and semi-reflective lens, which can irradiate the object to be measured from the side, contribute to irradiating the edge and contour of the object to be measured, and at the same time, part of the light source projected from the fifth lens enters the imaging device to provide a light source for the imaging device, so that the details of the object to be measured are more obvious and the clarity of the image is increased.

[0022] Further, the side light source module further includes a third lens, and both the second lens and the third lens are condenser lenses.

[0023] With the above arrangement, the condenser lenses can evenly focus the light on the object to be measured. Uniform illumination can reduce the shadows and reflections caused by uneven light, thereby making the imaging result clearer and more accurate.

[0024] Further, the first lens is a reflective lens.

[0025] With the above arrangement, the first lens being a reflective lens can reflect the light emitted by the coaxial light source module, enabling it to enter the fifth lens more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0027] Figure 2 It is one of the exploded views of the present utility model.

[0028] Figure 3 It is another exploded view of the present utility model.

[0029] Figure 4 It is a third exploded view of the present utility model.

[0030] Figure 5 It is a fourth exploded view of the present utility model.

[0031] Figure 6 It is a fifth exploded view of the present utility model.

[0032] Figure 7 It is a schematic diagram of the overall structure of the connection between the present utility model and a photographing device.

[0033] Figure 8 It is a schematic diagram of the structure of the side light source module in the present utility model.

[0034] Explanation of the reference numerals in the drawings: 1 - coaxial light source module; 11 - coaxial light emitter; 12 - lens assembly; 121 - first lens; 122 - second lens; 2 - side light source module; 21 - side light emitter; 211 - side light mounting body; 212 - circuit board; 213 - light source; 2111 - mounting plate; 22 - third lens; 3 - mounting seat; 31 - fourth lens; 32 - mounting hole; 321 - first mounting hole; 322 - second mounting hole; 33 - fifth lens; 4 - photographing device; 5 - object to be measured; 6 - ventilation opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] As Figures 1-7As shown in the figure, a light source device with good imaging effect for PCB blind hole detection includes a mounting base 3, a coaxial light source module 1 and a side light source module 2. The coaxial light source module 1 includes a coaxial light emitter 11 and a lens assembly 12. The lens assembly 12 includes more than one first lens 121 and a second lens 122. The first lens 121 is arranged on the light source side of the coaxial light emitter 11, and the second lens 122 is arranged on the other side of the first lens 121. The side light source module 2 includes more than one side light emitter 21 and a third lens 22. The third lens 22 is arranged on the light source side of the side light emitter 21. The coaxial light source module 1 is arranged on one side of the mounting base 3, and the side light source module 2 is arranged in the middle of the mounting base 3. Setting the coaxial light source module 1 and the side light source module in the light emitting device can provide light in different directions to meet the needs of different objects to be measured. The coaxial light source module 1 is used to irradiate the center of the object to be measured, and the side light source module 2 can irradiate the object to be measured from the side to eliminate shadows. Moreover, the coaxial light source module 1 and the side light source module 2 are arranged in a mounting base 3 to form a closed area, which helps to reduce the scattering of light and external light interference. By using the lens assembly 12 to guide the light emitted by the coaxial light source module 1, the expected lighting effect can be achieved.

[0036] As Figures 1-2 shown in the figure, the lens assembly 12 includes two first lenses 121 and a second lens 122. The two first lenses 121 are symmetrically arranged about the axis of the coaxial light emitter 11. One end of the two first lenses 121 is inclined towards the coaxial light emitter 11, and the other end of the two first lenses 121 is inclined towards the second lens 122. The second lens 122 is located in front of the first lenses 121 and is arranged parallel to the coaxial light emitter 11. One end of the two first lenses 121 is inclined towards the coaxial light emitter 11, and the two first lenses 121 form a symmetric inclined angle. When the coaxial light emitter 11 emits light, under the action of the two first lenses 121, the light propagates in the two first lenses 121 to reduce the occurrence of light scattering. The other end of the two first lenses 121 is inclined towards the second lens 122, so that the light propagates between the second lens 122 and the coaxial light emitter 11, and the light is concentrated on the second lens 122 to enhance the intensity of the light.

[0037] As Figures 3-5As shown in the figure, an observation window is provided on the upper surface of the mounting base 3. The observation window includes a fourth lens 31 and a fifth lens 33. The fourth lens 31 is fixedly arranged on the upper surface of the mounting base 3. A semi-transmissive and semi-reflective lens is obliquely arranged below the fourth lens 31. The mounting base 3 is provided with an observation window. Generally, the photographing device 4 is placed above the observation window. The photographing device 4 can photograph the object to be measured 5 through the fourth lens 31. And a semi-transmissive and semi-reflective lens is arranged below the fourth lens 31 to reflect a part of the light emitted by the coaxial light-emitting body 11, and then the light is transmitted through the semi-transmissive and semi-reflective lens and projected onto the object to be measured. And a part of the light emitted by the coaxial light-emitting body 11 can pass through the semi-transmissive and semi-reflective mirror and reach the photographing device, so that the photographing device can obtain a clearer image.

[0038] The side light-emitting body 21 is arranged below the fifth lens 33. The side light-emitting body 21 is arranged below the coaxial light reflected by the fifth lens 33, and can irradiate the object to be measured 5 from the side, which helps to irradiate the edge and contour of the object to be measured 5, so that the details of the object to be measured 5 are more obvious and the clarity of the image is increased.

[0039] Mounting holes 32 are oppositely arranged on both side surfaces of the mounting base 3. The mounting holes 32 include a first mounting hole 321 and a second mounting hole 322. The first mounting hole 321 and the second mounting hole 322 are symmetrically arranged with respect to the axial direction of the mounting base 32, and the first mounting hole 321 and the second mounting hole 322 are connected. The first mounting hole 321 and the second mounting hole 322 are arranged downward and outward. Two side light-emitting bodies are arranged in the mounting holes 32. The mounting base 3 is provided with mounting holes 32, and two side light-emitting bodies 21 can be obliquely and fixedly arranged in the mounting holes 32.

[0040] As Figure 3 and Figure 8 shown in the figure, the side light-emitting body 21 includes a side light-emitting mounting body 211. A circuit board 212 is arranged at the lower end of the side light-emitting mounting body 211. A light source 213 is arranged on the circuit board 212. A ventilation opening 6 is arranged on the side light-emitting mounting body 211 along the length direction of the side light-emitting mounting body 211. The ventilation opening 6 is connected to an external ventilation device (not shown in the figure). Mounting pieces 2111 are arranged on the side edges of the side light-emitting mounting body 211. Mounting holes are arranged on the mounting pieces 2111. The mounting pieces 2111 are fixedly mounted on the outer side wall of the mounting base 3 through the mounting holes. The side light-emitting mounting body 211 is inserted into the mounting hole 32, and then the side light-emitting mounting body 211 is fixed on the mounting base 3 through the mounting pieces 2111 to realize the installation. And there is a gap between the lower end surface of the side light-emitting body 21 and the inner side wall of the lower end of the mounting hole.

[0041] When there is a gap between the two side-light emitters 21 installed in the mounting holes 32, and the light source side of the side-light emitter 21 does not contact the mounting base 3. When the side-light emitter 21 is working, the heat generated can enter through the ventilation opening 6 on one side of the mounting base 3 by the ventilation equipment and then be extracted from the ventilation opening on the other side of the mounting base 3. Since the circuit board is located at the lower end of the ventilation opening 6 and the side-light mounting base 211 is arranged in the cavity of the mounting base 3, air-borne heat dissipation can be achieved, thereby extending the service life of the lighting device. The light of the coaxial emitter 11 can reach the fifth lens 33 through the second lens 122. The fifth lens 33 is a semi-transmissive and semi-reflective lens. The light of the coaxial emitter can reach the object to be measured 5 through the fifth lens 33. The light emitted by the coaxial emitter 11 passes through the second lens 122, ensuring that the light is evenly irradiated onto the semi-transmissive and semi-reflective lens, reducing the influence of ambient light on imaging, and then evenly irradiating onto the object to be measured 5, reducing the shadow caused by uneven light, making the imaging clearer.

[0042] The first lens 121 and the second lens 122 are reflective lenses, and the third lens 22 are all condenser lenses. The light emitted by the third lens 22 can enter the fourth lens. The condenser lens can evenly focus the light onto the object to be measured 5. Uniform illumination can reduce the shadow and reflection caused by uneven light, thereby making the imaging result clearer and more accurate.

[0043] As Figure 3 shown, a vertical mounting hole is provided on the mounting base 3, and a coaxial light source module is installed in the vertical mounting hole. The structure of the coaxial mounting module is the same as that of the side-light module, and both are installed through the mounting piece.

[0044] The working principle of the present utility model: A coaxial emitter 11 is provided on one side of the mounting base 3. Two first lenses 121 are provided on the light source side of the coaxial emitter 11. One end of the two first lenses 121 is inclined towards the coaxial emitter 11, and the other end of the two first lenses 121 is inclined towards the second lens 122. When the coaxial emitter 11 emits light, under the action of the two first lenses 121, the light propagates in the two first lenses 121, thereby reducing the occurrence of light scattering. The other end of the two first lenses 121 is inclined towards the second lens 122, so that the light enters the third lens 123 for condensing under the reflection of the second lens 122 and then enters the inclined fourth lens 31. Part of the light is reflected through the fifth lens 33 and enters the object to be measured 5, and the other part of the light is refracted through the fifth lens 33 and then emitted to the imaging device 4 for brightening setting, thereby helping to irradiate the edge and contour of the object to be measured 5, making the details of the object to be measured 5 more obvious and increasing the clarity of the image.

Claims

1. A light source device with good imaging effect for PCB blind hole detection, comprising a mounting base, a coaxial light source module and a side light source module, characterized in that: The coaxial light source module includes a coaxial light emitter and a lens assembly. The coaxial light emitter is disposed on one side of the mounting base. The lens assembly includes one or more first lenses and a fifth lens. The first lens is inclined with respect to the coaxial light source module, and the fifth lens is inclined with respect to the axis of the coaxial light source module. The side light source module is disposed on the mounting base and is located below the fifth lens. The light emitted by the coaxial light source module is reflected by the first lens and then reflected by the fifth lens onto the object to be measured.

2. The light source device with good imaging effect for PCB blind hole detection according to claim 1, characterized in that: The lens assembly includes two first lenses, and the two first lenses are symmetrically disposed with respect to the axis of the coaxial light source module. One end of the two first lenses is inclined downward and inward toward the coaxial light emitter.

3. The light source device with good imaging effect for PCB blind hole detection according to claim 2, characterized in that: The lens assembly further includes one or more second lenses. The second lenses are disposed parallel to the coaxial light source module and are inclined with respect to the first lenses.

4. The light source device with good imaging effect for PCB blind hole detection according to claim 1, characterized in that: The mounting base is of a hollow cavity structure. An observation window is provided on the upper surface of the mounting base. A fourth lens is provided on the observation window. The fifth lens is disposed below the fourth lens and is inclined with respect to the fourth lens.

5. The light source device with good imaging effect for PCB blind hole detection according to claim 1, characterized in that: Mounting holes are provided on opposite sides of the mounting base, and two side light emitters are provided in the mounting holes.

6. The light source device with good imaging effect for PCB blind hole detection according to claim 1, characterized in that: The side light emitter includes a side light mounting body. A circuit board is provided at the lower end of the side light mounting body, and a light source is provided on the circuit board. A ventilation opening is provided on the side light mounting body along the length direction of the side light mounting body, and the ventilation opening is connected to an external ventilation device.

7. An imaging-effective light source device for PCB blind hole detection according to claim 1, characterized in that: Mounting pieces are provided on the side edges of the side light mounting body, and the mounting pieces are connected to the outer side wall of the mounting base.

8. An illumination device with good imaging effect for PCB blind hole detection according to claim 4, characterized in that: The fifth lens is a semi-transmissive and semi-reflective lens.

9. An illumination device with good imaging effect for PCB blind hole detection according to claim 3, wherein: The side light source module further includes a third lens. The third lens is provided outside the light source. Both the second lens and the third lens are condenser lenses.

10. The light source device with good imaging effect for PCB blind hole detection according to claim 1, characterized in that: The first lens is a reflective lens.

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