CN111580325A - High-brightness corner coaxial light source - Google Patents
High-brightness corner coaxial light source Download PDFInfo
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- CN111580325A CN111580325A CN202010437075.1A CN202010437075A CN111580325A CN 111580325 A CN111580325 A CN 111580325A CN 202010437075 A CN202010437075 A CN 202010437075A CN 111580325 A CN111580325 A CN 111580325A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/06—Special arrangements of screening, diffusing, or reflecting devices, e.g. in studio
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Abstract
The invention relates to the technical field of visual imaging, and discloses a high-brightness corner coaxial light source which comprises a light-emitting component and a sub-lens; the high-brightness corner coaxial light source provides vertical weak illumination through the transmission light rays of the light splitting part of the lens, provides strong supplementary illumination through the light transmitting part, and can continuously illuminate the detected object without dead angles on an imaging surface, so that diffuse reflection light imaging is enhanced, specular reflection light imaging is weakened, the halo phenomenon of a shot image is eliminated, surface details of a shot object are stabilized, and the angle change adaptability of the imaging surface to the light source is improved; by setting the sub-lens to be a structure without a solid body at the light transmission part, the vertical space is further saved, the light path of light transmitted among all parts is shortened, the light source irradiation effect is enhanced, and the convenience and the flexibility in use are improved; the luminous bodies are arranged into a plurality of rectangular annular luminous body groups with the brightness adjusted independently, so that the flexibility of adjusting the brightness area of the luminous part is enhanced.
Description
Technical Field
The invention relates to the technical field of visual imaging, in particular to a high-brightness corner coaxial light source.
Background
The visual inspection system is a common technology for industrial automatic product inspection, and takes pictures of an inspected object through illumination, a camera device and the like, and then analyzes the obtained images through software, so that defect information of the inspected object in aspects of bar code characters, cracks, packaging, surface layers, circuit welding and the like is obtained, the information has important significance for work in aspects of product sorting, technical improvement and the like, the yield and quality of products can be improved to a great extent by using the visual inspection system, and the cost of manual inspection is greatly saved.
In a vision detection system, vision imaging is performed first, and a coaxial light source is generally used for supplementing light to an object to be detected, so that an obtained image is clearer and is convenient for analysis in the next step. In the existing visual inspection system, the arrangement modes of the coaxial light sources in the system mainly include two types: one is a coaxial light source which is vertically shot, in the arrangement mode, a lens is vertically arranged with an object to be detected, the light source and the object to be detected are arranged in a rotating angle mode, a light splitting piece of the light source reflects part of light to the object to be detected, the object to be detected reflects the light to the light splitting piece, part of the light reflected by the object to be detected can be transmitted to the lens through the light splitting piece, and the lens can shoot the part of the light to be detected, namely, an image of the object to be detected; the other is a coaxial light source for angle shooting, in the arrangement mode, the light source is arranged perpendicular to the object to be detected, the lens is arranged at an angle relative to the object to be detected, the light splitting sheet of the light source transmits a part of light to the object to be detected, the object to be detected reflects the light to the light splitting sheet, the part of light reflected by the object to be detected is reflected to the lens through the light splitting sheet, and the lens can shoot the part of light to be detected, namely the image of the object to be detected.
The arrangement of the two light sources has at least the following defects:
1. the requirement on the space in the vertical direction or the corner direction of the detected object is large, and enough installation space is needed, so that the volume of a visual detection system is large, and an irradiation light path is long;
2. the single light splitting reflection or light splitting transmission mode is adopted for light striking, so that the brightness of a light source is seriously reduced, and the brightness uniformity in an irradiation range is poor;
3. because the light source is large in size, the multi-angle dead-angle-free combined illumination mode is inconvenient to design, the illumination light angle is small, and the adaptability to the angle change of an imaging plane is extremely poor;
4. for the surface of a shot object, light sources are vertically irradiated, so that the reflected light of an imaging surface is too strong, the diffuse reflected light is too weak, the image is easy to generate a halo effect, and the detailed image of the surface of the object is poor.
Based on the above-mentioned drawbacks of the prior art coaxial light sources, it is necessary to invent a new coaxial light source to overcome these problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-brightness corner coaxial light source which is small in volume, capable of continuously illuminating at a large angle in the vertical direction, shortened in illumination light path, strong in illumination brightness and uniform.
In order to achieve the above purpose, the invention provides the following technical scheme:
a high brightness angled coaxial light source, comprising: a light emitting module for emitting illumination light to an object to be inspected; and the sub-lens is arranged on the light path of the lighting light of the light-emitting assembly, the sub-lens comprises a light splitting part positioned in a central area and a light transmitting part positioned in an edge area, the light splitting part is used for transmitting the lighting light to the detected object and reflecting the imaging light of the detected object to the lens, and the light transmitting part is used for transmitting the lighting light to the detected object.
In the present invention, preferably, the light splitting part is a spectroscope, and the light transmitting part is a light transmitting mirror.
In the present invention, preferably, the light-transmitting portion includes a solid light-transmitting portion and a non-solid light-transmitting portion, the solid light-transmitting portion is a solid structure having a light-transmitting function and is fixedly connected to the light-splitting portion, and the non-solid light-transmitting portion is a void region around the light-splitting portion and the solid light-transmitting portion without any solid.
In the present invention, it is preferable that the sub-lens includes a substrate, a light transmissive film and a light splitting film, the light transmissive film is fixed to the entire upper surface and the entire lower surface of the substrate, the light splitting film is fixed to a central region of the upper surface or the lower surface of the substrate, the central region of the sub-lens constitutes the light splitting portion, and an edge region of the sub-lens constitutes the light transmissive portion.
In the present invention, preferably, the optical inspection device further includes a housing, the light emitting assembly is fixed at one end of the housing, the other end of the housing is provided with an illumination port, the sub-lens is fixed in a side wall of the housing between the light emitting assembly and the illumination port, and a shooting port is formed in a position on the side wall, through which imaging light of the object to be inspected is reflected by the sub-lens.
In the present invention, preferably, the light emitting assembly includes: a light emitting panel for emitting illumination light; and the light-diffusing plate is fixed between the light-emitting plate and the sub-lens and is used for softening the illumination light.
In the present invention, preferably, the light-emitting plate is provided with a plurality of light-emitting bodies, the light-emitting bodies are arranged into a plurality of light-emitting body groups, and the plurality of light-emitting body groups can respectively and independently adjust the brightness.
In the present invention, preferably, the light emitting groups are all rectangular structures, and the rectangular perimeters of the plurality of light emitting groups are different, and the plurality of light emitting groups are sequentially arranged from the center to the periphery in a light emitting array from small to large.
In the present invention, preferably, the light emitting assembly further includes a heat dissipation device, and the heat dissipation device is fixedly connected to the light emitting panel and is configured to accelerate the heat dissipation speed of the light emitting panel.
In the present invention, preferably, the angle between the sub-lens and both the illumination opening and the shooting opening is 45 °.
Compared with the prior art, the invention has the beneficial effects that:
according to the high-brightness corner coaxial light source, the vertical weak illumination is provided through the transmission light rays of the light splitting part of the sub-lens, the strong supplementary illumination is provided through the light transmitting part, and the object to be detected can be continuously illuminated without dead angles on the imaging surface, so that the imaging of diffuse reflection light is enhanced, the imaging of specular reflection light is weakened, the halo phenomenon of a shot image is eliminated, the surface details of a shot object are stabilized, and the angle change adaptability of the imaging surface to the light source is improved; by setting the sub-lens to be a structure without a solid body at the light transmission part, the vertical space is further saved, the light path of light transmitted among all parts is shortened, the light source irradiation effect is enhanced, and the convenience and the flexibility in use are improved; the light-diffusing plate is arranged on the light-emitting assembly, so that the illumination light is more uniform in spatial distribution, and the illumination effect is improved; the luminous bodies are arranged into a plurality of rectangular annular luminous body groups with the brightness adjusted independently, so that the flexibility of adjusting the brightness area of the luminous part is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a high-brightness corner coaxial light source.
Fig. 2 is a schematic structural diagram of a sub-lens.
Fig. 3 is a schematic structural diagram of a high-brightness corner coaxial light source with a non-solid light-transmitting portion.
Fig. 4 is a schematic structural diagram of a partial lens having a non-solid light-transmitting portion.
Fig. 5 is a schematic structural diagram of a light emitter array.
In the drawings: 1-luminous component, 101-luminous plate, 1011-luminous body, 102-light-dispersing plate, 103-heat dissipation device, 2-lens, 201-light splitting part, 202-light transmitting part, 2021-solid light transmitting part, 3-shell, 301-lighting port, 302-shooting port, 4-detected object and 5-camera device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 5, a high-brightness corner coaxial light source according to a preferred embodiment of the present invention includes a light emitting assembly 1 and a sub-lens 2.
In the present embodiment, the light emitting module 1 is fixed at a position where the object 4 is detected, and may be a side of the object 4 or an upper or lower side thereof as necessary, and in the present embodiment, the light emitting module 1 is fixed above the object 4, and the light emitting module 1 emits the illumination light downward, that is, the illumination light is perpendicular to a horizontal plane. The sub-lens 2 is fixed below the light emitting component 1 and is positioned on the light path of the illumination light, so that the illumination light can directly irradiate the sub-lens 2. When the visual imaging is carried out, the object 4 is placed below the sub-lens 2, and the light-emitting assembly 1, the sub-lens 2 and the object 4 form a straight line.
As shown in fig. 1, the center position of the sub-lens 2 is the spectroscopic part 201, when the illumination light enters the spectroscopic part 201, a part of the light is reflected to another position by the spectroscopic part 201, and another part of the light passes through the spectroscopic part 201 and is emitted to the other side of the spectroscopic part 201, that is, the object 4 to be detected can be irradiated at the intermediate position, so as to provide the vertical illumination to the object 4, and since the illumination light is reflected partially when passing through the spectroscopic part 201, the brightness of the light irradiated to the object 4 is reduced, so that the vertical illumination light is relatively weak light, that is, the weak vertical illumination is provided. The edge position of the sub-lens 2 is the light-transmitting portion 202, when the illumination light enters the light-transmitting portion 202, the light directly passes through the light-transmitting portion 202 and irradiates the other side of the light-transmitting portion 202, i.e. the light irradiates the object 4 to be detected from the edge position, and plays a role of providing supplementary lighting for the object 4, because the illumination light does not generate reflected light when passing through the light-transmitting portion 202, the brightness of the light irradiating the object 4 is not reduced basically, the supplementary lighting light is relatively strong light, that is, strong supplementary lighting is provided. The surface of the object 4 is irradiated by the weak vertical illumination light and the strong complementary illumination light, and after the light is reflected to the light splitting part 201 of the sub-lens 2, a part of the light is transmitted to the other side through the light splitting part 201, and the other part of the light is reflected by the light splitting part 201, the image of the object 4 can be displayed in the light splitting part 201 through the part of the light reflected by the light splitting part 201, and the part of the light reflected by the light splitting part 201 is the imaging light, so that the image of the object 4 can be shot by arranging a lens on the light path of the imaging light to align with the camera device 5 of the light splitting part 201. Since the imaging light reflected by the spectroscopic part 201 should form a certain angle with the illumination light, the lens can only shoot the image of the object 4, and therefore the illumination light and the spectroscopic lens 2 cannot be parallel or perpendicular, and the angle between the illumination light and the spectroscopic lens 2 should be greater than 0 ° and smaller than 90 °, which is theoretically possible, so that the lens can shoot the image of the object 4 from the spectroscopic part 201 of the spectroscopic lens 2. To obtain the optimal angle of imaging, the angle between the illumination light and the sub-lens 2 is 45 °, and at this time, the imaging light is perpendicular to the illumination light, and the lens can shoot the image of the object 4 to be detected in the light splitting part 201 from the side, and can shoot at the shortest distance, and the propagation path of the imaging light is shortest, and the obtained image is clearest, and the space restriction is small, and the space required by the shooting device can be saved.
In the embodiment, different properties of the spectroscopic part 201 and the light transmission part 202 of the lens assembly 2 are utilized to provide weak vertical illumination and strong supplementary illumination which emit to the detected object 4, compared with a traditional spectroscope which adopts light rays reflected and transmitted by all parts without difference, the supplementary illumination light rays are obviously enhanced, the overall brightness of the illumination light rays which emit to the detected object 4 is improved, the brightness of the surface of the detected object 4 is more uniform, in imaging light, the intensity of reflected light from the detected object and the intensity of diffuse reflected light are closer and tend to be balanced, the halo effect in a shot image is eliminated to a great extent, and the image of the surface details of the detected object 4 is more accurately embodied.
In a preferred embodiment of the present invention, as shown in fig. 2, the beam splitting part 201 is a beam splitter, is located at the center of the splitting lens 2, and can be in various shapes such as a circle and a rectangle, when the light is irradiated thereon, a part of the light is reflected, and the other part of the light is transmitted to the other side; the light-transmitting portion 202 is a light-transmitting mirror, is located at the edge of the sub-lens 2, and is fixedly connected or directly integrally connected with the light-splitting portion 201, and when light is irradiated on the light-transmitting mirror, the light directly passes through the surface of the light-transmitting mirror and reaches the other side of the light-splitting portion. Therefore, when the illuminating light emitted by the light emitting component 1 irradiates the light transmitting mirror 201, the central illuminating light forms weak vertical illuminating light under the action of the spectroscope, the edge illuminating light forms strong complementary illuminating light under the action of the light transmitting mirror, so that the brightness of the surface of the detected object 4 positioned below the sub-lens 2 is more uniform, the brightness of the illuminating light is also improved, the shot image is clearer and more accurate, in the imaging light, the intensity of the reflected light from the detected object and the intensity of the diffuse reflected light are closer and tend to be balanced, and the halo effect in the shot image is greatly eliminated.
In a preferred embodiment of the present invention, the light-transmitting portion 202 includes a solid light-transmitting portion 2021 and a non-solid light-transmitting portion, the solid light-transmitting portion 2021 is a solid structure having a light-transmitting function, and the non-solid light-transmitting portion is a void region without any solid. As shown in fig. 3, the sub-lens 2 does not completely cover the illumination light path, but only a part of the edge area covers the illumination light path, and the area covering the illumination light path has a light transmitting function and has a solid structure (e.g. using a light transmitting mirror), i.e. a solid light transmitting portion 2021, and is connected with the light splitting portion 201 located in the central area, and besides being used for transmitting the illumination light, the light splitting mirror needs to be fixed at a position needing to be fixed through the solid light transmitting portion 2021. In the empty region where the sub-lens 2 does not cover the optical path of the illumination light, the illumination light can directly pass through and irradiate the object 4, and objectively also functions as a light transmitting portion, and therefore, the illumination light may be a part of the light transmitting portion 202 of the sub-lens 2, and since there is no solid structure, it is called a non-solid light transmitting portion. As shown in fig. 4, the solid light-transmitting portions 2021 are provided on the left and right sides of the spectroscopic portion 201, the solid light-transmitting portions 2021 are fixedly connected to the side walls of the housing 3 and are located at the middle position of the cross section of the housing 3, the illumination light can pass through the gaps on the front and rear sides of the spectroscopic portion 201 and the solid light-transmitting portions 2021 to directly irradiate the object 4, and the gaps on the front and rear sides of the spectroscopic portion 201 and the solid light-transmitting portions 2021 can transmit the illumination light, so that the gaps on the front and rear sides of the spectroscopic portion 201 and the solid light-transmitting portions 2021 are non-solid light-. Through setting up non-entity printing opacity portion, can reduce the volume of minute lens 2, minute lens 2 slope sets up and can occupy certain space in illuminating light's direction, therefore minute lens 2's volume reduces and to make the holistic volume of coaxial light source reduce, make light-emitting component 1, minute lens 2 and the distance of examining between the thing 4 three can be more nearly, thereby the light path that light propagated between the three has been shortened, further save space, the reinforcing light source shines the effect, improve the definition of formation of image, the coaxial light source's of high bright corner use is more convenient and nimble, and the resource has been practiced thrift.
In a preferred embodiment of the present invention, the sub-lens 2 includes a substrate, which may be made of optical glass, and the whole surfaces of the upper surface and the lower surface of the substrate are covered with an antireflection film, and may be implemented by using a chemical vapor deposition method, a sputtering method, or other existing methods. Then, the light splitting film is fixed in the central area of the substrate, the light splitting film can be on the upper surface or the lower surface of the coated substrate, or the upper surface or the lower surface of the substrate before coating, the area where the light splitting film is fixed is the light splitting part 201, and the light splitting film can be plated on the substrate or pasted on the substrate. The edge area of the substrate is not covered with the light splitting film, so that the substrate has a good light transmission effect, and the edge area fixed with the antireflection film is the light transmission part 202. The sub-lens 2 manufactured by fixing the antireflection film and the light splitting film on the substrate has a simple structure, is easy to realize, and can obtain good effects of reflecting light rays, transmitting light rays and the like.
In a preferred embodiment of the present invention, the high-brightness corner coaxial light source further includes a housing 3, the light emitting assembly 1 and the sub-lens 2 are fixed in the housing 3, and therefore, the housing 3 should be in a certain linear structure, as shown in fig. 1 and 3, the light emitting assembly 1 is fixed at one end of the housing 3, the other end of the housing 3 is provided with an illumination port 301, and the sub-lens 2 is fixed in a side wall of the housing 3 between the light emitting assembly 1 and the illumination port 301. The illumination light emitted by the light emitting assembly 1 reaches the illumination opening 301 through the partial lens 2, and the object 4 is placed at the illumination opening 301, so that the object 4 can be illuminated. An imaging port 302 is provided in a side wall of the housing 3 at a position corresponding to the light beam of the sub-lens 2 reflecting the image of the object 4, and taking the sub-lens 2 forming an angle of 45 ° with the illumination light beam as an example, the imaging port 302 is provided in a position corresponding to the sub-lens 2 in the side wall and should be a position where one surface of the sub-lens 2 close to the object 4 can be observed, and the lens can image the image of the object 4 in the spectroscopic part 201 of the sub-lens 2 from the imaging port 302. Through setting up casing 3, can be fixed with light-emitting component 1 and minute lens 2's relative position, integrate whole high bright coaxial light source of corner, convenient transport, debugging and use.
In a preferred embodiment of the present invention, the light emitting assembly 1 includes a light emitting panel 101 and a light diffusion panel 102. The light emitting panel 101 has a light emitting portion capable of emitting illumination light. The light-diffusing plate 102, which may be made of a single or a composite material of glass, plastic, etc., is fixed to the outside of the light-emitting assembly 1, i.e., at a position between the light-emitting plate 101 and the sub-lens 2, for softening the illumination light before it irradiates the sub-lens 2. After the illumination light emitted by the light-emitting plate 101 passes through the light-diffusing plate 102, the light is more uniform and softer in spatial distribution, so that the light-emitting plate is suitable for observation by human eyes, the fatigue of the human eyes is relieved, and the illumination effect is improved.
In a preferred embodiment of the present invention, a plurality of light emitters 1011 are fixed on the light-emitting panel 101, and the light emitters 1011 may be light-emitting elements such as LED lamps. The luminous bodies 1011 are arranged into a plurality of luminous body groups according to a certain rule, the brightness adjustment of each luminous body group has independence, and the process of adjusting the brightness of a certain luminous body group is not influenced by other luminous body groups, so that each luminous body group can present different brightness. The brightness of the plurality of light emitting component groups is independently adjusted, so that different areas of the light emitting plate 101 can emit illumination light rays with different intensities, the illumination intensity of different areas can be adjusted when the light emitting component 1 is used for illuminating the detected object 4, different illumination conditions can be obtained as required, and the flexibility of adjusting the illumination light ray areas is enhanced.
In a preferred embodiment of the present invention, the light emitting groups are all rectangular structures, and the rectangular perimeter of each light emitting group is different, and a plurality of light emitting groups are sequentially arranged from the center to the periphery in the light emitting array from small to large. For example, as shown in fig. 5, a first illuminant group includes only one illuminant 1011, which can be regarded as a rectangular structure, and is located at the center, a second illuminant group includes more illuminants 1011, which are in a hollow rectangular shape and can also be called as a rectangular ring structure, and is sleeved in a circle outside the first illuminant group, and so on, more illuminant groups in a rectangular ring structure can be sleeved on the outer ring of the second illuminant group, so that a large illuminant array formed by arranging a plurality of illuminant groups in a rectangular structure is obtained, and the brightness of each illuminant group is independently adjusted. Through the luminous body group who sets up a plurality of rectangle structure, can use the rectangle structure to adjust illumination light's illumination intensity and light distribution as unit control area, can highlight the change at measured object edge, be applicable to scenes such as component, label on the detection circuit board to can adjust the illumination intensity in different regions as required, strengthened the flexibility of illumination light regional regulation.
In a preferred embodiment of the present invention, the light emitting assembly 1 further comprises a heat sink 103, and the heat sink 103 is fixedly connected to the light emitting panel 101. The light emitting panel 101 generates heat while emitting illumination light, and the heat accumulation increases the temperature, which may affect the normal operation of the light emitting panel 101. The heat dissipation device 103 can accelerate the heat dissipation speed of the light emitting panel 101 through a plurality of ways such as rapid heat conduction, increased heat dissipation area, accelerated air flow, etc., thereby reducing heat accumulation, preventing the light emitting panel 101 from working abnormally due to over-high temperature, and protecting the light emitting panel 101 from being damaged.
In a preferred embodiment of the present invention, the sub-lens is at 45 ° to both the illumination port and the photographing port. At this time, the imaging light is perpendicular to the illumination light for the optimal angle of imaging, the lens can laterally photograph the image of the object 4 to be inspected in the light splitting part 201, the lens can photograph at the shortest distance, the propagation path of the imaging light is shortest, the obtained image is clearest, the space limitation is small, and the space required by the photographing device can be saved.
The working principle is as follows:
after the luminous body on the luminous plate 101 emits illumination light, the illumination light is softened by the light-diffusing plate 102 and is emitted to the sub-lens 2, the light splitting part 201 in the middle area of the sub-lens 2 reflects part of the illumination light to other areas, and the other part of the illumination light is transmitted to the detected object 4 through the illumination port 301 to form weak vertical illumination light; the light-transmitting part 202 of the edge region of the sub-lens 2 transmits the illumination light directly to the object 4 through the illumination port 301, so as to form strong supplementary illumination light. The weak vertical illumination light and the strong supplementary illumination light irradiate the detected object 4 together, so that the illumination intensity of the surface of the detected object 4 is uniform, and the vertical reflected light and the diffuse reflected light tend to be balanced.
If the light on the surface of the object 4 is still not ideal, the brightness of each light emitting group on the light emitting plate 101 can be adjusted, and the adjustment processes of each circular light emitting group are independent, so that the brightness of each light emitting group can be efficiently and finely adjusted, and the illumination condition on the surface of the object 4 can reach a satisfactory degree.
After obtaining the ideal illumination light on the surface of the object 4, the lens of the imaging device 5 is aligned with the imaging port 302, and after the illumination light enters the surface of the object 4, the object 4 reflects the light to the spectroscopic part 201 of the spectroscopic lens 2, and a part of the light reflected by the object 4 is transmitted to the other side of the spectroscopic part 201 at the spectroscopic part 201, and the other part is reflected by the spectroscopic part 201 to form an imaging light, and the imaging light is emitted to the lens, so that the lens can image the image of the object 4 presented in the spectroscopic part 201.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (10)
1. A high brightness angled coaxial light source, comprising:
a light emitting module for emitting illumination light to an object to be inspected; and
the sub-lens is arranged on a light path of the lighting light of the light-emitting assembly and comprises a light splitting part positioned in a central area and a light transmitting part positioned in an edge area, the light splitting part is used for transmitting the lighting light to the detected object and reflecting the imaging light of the detected object to the lens, and the light transmitting part is used for transmitting the lighting light to the detected object.
2. The high brightness corner coaxial light source according to claim 1, wherein the light splitting part is a spectroscope and the light transmitting part is a light transmitting mirror.
3. The high-brightness corner coaxial light source according to claim 1, wherein the light-transmitting portion comprises a solid light-transmitting portion and a non-solid light-transmitting portion, the solid light-transmitting portion is a solid structure with a light-transmitting function and is fixedly connected to the light-splitting portion, and the non-solid light-transmitting portion is a void area without solid bodies around the light-splitting portion and the solid light-transmitting portion.
4. The high-brightness corner coaxial light source according to claim 1, wherein the sub-lens comprises a substrate, a light-transmitting film and a light-splitting film, the light-transmitting film is fixed on the whole upper surface and the whole lower surface of the substrate, the light-splitting film is fixed on the central region of the upper surface or the lower surface of the substrate, the central region of the sub-lens forms the light-splitting part, and the edge region of the sub-lens forms the light-transmitting part.
5. The high-brightness corner coaxial light source according to claim 1, further comprising a housing, wherein the light emitting assembly is fixed at one end of the housing, the other end of the housing is provided with an illumination port, the sub-lens is fixed in a sidewall of the housing between the light emitting assembly and the illumination port, and a shooting port is formed in a position on the sidewall, through which imaging light of the object to be detected is reflected by the sub-lens.
6. A high brightness angled coaxial light source as recited in claim 1, wherein said light emitting assembly comprises:
a light emitting panel for emitting illumination light; and
and the light diffusion plate is fixed between the light diffusion plate and the sub-lens and is used for softening the illumination light.
7. The high-brightness corner coaxial light source according to claim 6, wherein the light-emitting plate is provided with a plurality of light-emitting bodies, the light-emitting bodies are arranged into a plurality of light-emitting body groups, and the brightness of the plurality of light-emitting body groups can be independently adjusted.
8. The high-brightness corner coaxial light source of claim 7, wherein the light emitting groups are rectangular, the rectangular perimeters of the plurality of light emitting groups are different, and the plurality of light emitting groups are arranged in a light emitting array from the center to the periphery in a descending order of the perimeters.
9. A high brightness, angled, co-axial light source as claimed in claim 6, wherein said light assembly further comprises a heat sink fixedly attached to said light panel for increasing the heat dissipation of said light panel.
10. The high-brightness rotating-angle coaxial light source according to claim 6, wherein the partial lens is 45 ° to both the illumination port and the shooting port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437075.1A CN111580325A (en) | 2020-05-21 | 2020-05-21 | High-brightness corner coaxial light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010437075.1A CN111580325A (en) | 2020-05-21 | 2020-05-21 | High-brightness corner coaxial light source |
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| CN113093454A (en) * | 2021-03-26 | 2021-07-09 | 华中科技大学 | Image acquisition system and imaging device with same |
| CN114002230A (en) * | 2021-12-03 | 2022-02-01 | 东莞锐视光电科技有限公司 | a synchronous light source |
| CN114584719A (en) * | 2022-03-07 | 2022-06-03 | 深圳市上品国际智能照明科技有限公司 | LED infrared light supplementing device for vehicle identification in traffic highway section |
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| CN114584719A (en) * | 2022-03-07 | 2022-06-03 | 深圳市上品国际智能照明科技有限公司 | LED infrared light supplementing device for vehicle identification in traffic highway section |
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