CN210269574U

CN210269574U - Accurate light emitting device for detection and measuring instrument

Info

Publication number: CN210269574U
Application number: CN201920720412.0U
Authority: CN
Inventors: 崔忠伟
Original assignee: Beijing Leader Intelligent Equipment Co ltd
Current assignee: Beijing Leader Intelligent Equipment Co ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-04-07
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a detect and use accurate light-emitting device and measuring apparatu, it includes light emitting area and convex lens to detect with accurate light-emitting device, luminous towards convex lens emission, the light emitting area includes more than one light emitting zone, light emitting zone possesses the boundary, at least one light emitting zone the boundary is relative convex lens's the asymmetric setting of optical axis. The utility model discloses a measuring apparatu includes that above-mentioned detects uses accurate light-emitting device. The utility model discloses it is good to the illuminating effect of small defect especially asymmetric defect, and the effect stability that the optional position of work piece in the illumination zone presented is high.

Description

Accurate light emitting device for detection and measuring instrument

Technical Field

The utility model discloses generally relate to the machine vision field, particularly, relate to a detect with accurate light-emitting device and measuring apparatu.

Background

At present, in the process of workpiece detection, the light source lighting effect for slight defects on the surface of a workpiece is poor, and particularly, light defects such as gentle slopes and tool marks and shear marks on the surface of the workpiece are not provided with a light source scheme with a standard effect, so that the defects are missed to be detected, and thus production accidents are caused. In addition, in the field of machine vision, common light sources such as coaxial light, annular light or flat light sources are adopted to illuminate the workpiece, but the consistency of illumination areas of the light sources is poor, the illumination effects presented when the workpiece is placed at different positions are different, when the workpiece is positioned at some positions in the illumination areas, slight defects such as scratches cannot be excited by the light sources to be obvious images, so that the detection of some surface defects of the workpiece is unstable, the workpiece needs to be placed at a specific position in the illumination areas, the defects on the workpiece and the light sources are positioned at the specific positions, the defects can be slightly presented, but on an automatic detection assembly line, a dynamic detection process cannot ensure that the requirements of the specific positions between the defects on the workpiece and the light sources are met, and the detection rate of the surface defects of the workpiece is low.

Therefore, there is a need for a precise light emitting device and a measuring instrument for detecting a slight defect such as a gentle slope on a surface, a tool mark, a shear mark, and the like, which have good uniformity of illumination effect and low cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides a detection of good and low cost of illuminating effect uniformity is with accurate light-emitting device and measuring apparatu.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

according to the utility model discloses an aspect provides a detect and use accurate light-emitting device, detect and use accurate light-emitting device including light emitting area and convex lens, luminous towards convex lens emission, the light emitting area includes the light zone of more than one, it possesses the boundary, at least one to send out the light zone the boundary is relative convex lens's the asymmetric setting of optical axis.

According to an embodiment of the present invention, the light emitting area is a monochromatic light emitting area. The monochromatic light emitting area can emit white light, a single color of light.

According to the utility model discloses an embodiment, monochromatic light zone is more than two, all with the look monochromatic light zone constitutes the same-colour light-emitting zone group, and is a set of at least the same-colour light-emitting zone group is relative convex lens's the asymmetric setting of optical axis. The same-color light-emitting region group may include one light-emitting region, two light-emitting regions, and three or more light-emitting regions, as long as each light-emitting region emits only light of the same color.

According to an embodiment of the present invention, the light-emitting units of the same color are two or more.

According to an embodiment of the present invention, the light emitting surface includes a light emitting area, the light emitting area emits monochromatic light or color light to the convex lens, and the boundary shape of the light emitting area is any one of a semicircle, a rectangle, a quarter circle, a sector, a triangle, and a polygon.

According to the utility model discloses an embodiment, the light emitting area includes three to four monochromatic light emitting area and each monochromatic light emitting area colour is all inequality, any monochromatic light emitting area the border homogeneous phase is relative convex lens's the asymmetric setting of optical axis.

According to an embodiment of the present invention, the boundary of the monochromatic light emitting area is fan-shaped or rectangular.

According to the utility model discloses an embodiment, it includes luminous LED particle array and diffuser plate to detect with accurate light-emitting device, luminous LED particle array to cast light on the diffuser plate, the light emergent face of diffuser plate forms the light emitting area.

According to the utility model discloses an embodiment, it still includes the diaphragm to detect with accurate light-emitting device, luminous LED granule array with the diaphragm is located respectively the both sides of diffuser plate, the diaphragm is close to the luminous hole face that the one side of convex lens was defined does the light emitting area.

According to an embodiment of the utility model, the diaphragm hole size is adjustable.

According to an embodiment of the present invention, the diffusion plate is attached with a brightness enhancement film or a prism film.

According to the utility model discloses an embodiment, it still includes the spectroscope to detect with accurate light-emitting device, the spectroscope set up in keeping away from of convex lens one side of light emitting area, the spectroscope will light that the light emitting area transmission comes carries out the partial reflection to project and receive light object surface, the reverberation transmission on light object surface the spectroscope.

According to an embodiment of the present invention, the convex lens is a fresnel lens.

According to the utility model discloses an embodiment, it is used for throwing light on to the metal surface of work piece to detect with accurate light-emitting device.

According to the utility model discloses an embodiment, convex lens's focus is A, the light emitting area is located convex lens's focal plane or be located with between the parallel X plane of focal plane and the Y plane, the X plane with the Y plane is located respectively the focal plane both sides, and all with distance less than or equal to A/5 between the focal plane.

According to an embodiment of the present invention, the X plane and the Y plane are respectively located on both sides of the focal plane, and all with a distance less than or equal to a/10 between the focal planes.

According to an embodiment of the present invention, the X plane and the Y plane are respectively located on both sides of the focal plane, and all with a distance between the focal planes is less than or equal to a/20.

According to an embodiment of the present invention, the X plane and the Y plane are respectively located on both sides of the focal plane, and all with a distance between the focal planes is less than or equal to a/100.

According to an embodiment of the present invention, the boundary aperture of the convex lens is D, T ═ a/D, and T is between 0.25 and 1.5.

According to an embodiment of the present invention, D is between 30 and 120 mm.

According to an embodiment of the present invention,

the distance between the X plane and the focal plane and the distance between the Y plane and the focal plane are both less than or equal to 5 millimeters;

the boundary aperture of the convex lens is D, T is A/D and T is between 0.25 and 1.5;

and, said D is between 20 and 200 mm.

According to the utility model discloses an in another aspect, still provide a measuring apparatu, include as above arbitrary the detection with accurate light-emitting device, the detection is used for projecting light to the article that awaits measuring with accurate light-emitting device, the measuring apparatu still includes:

the carrying device is used for carrying the object to be tested;

and the camera device is configured to shoot the image of the object to be detected.

According to the above technical scheme, the utility model discloses a detect with accurate light-emitting device's advantage lies in with positive effect:

the utility model discloses in, one or more of light emitting area send out the light zone, through the asymmetric setting of relative convex lens optical axis on its border shape or colour overall arrangement, and then to convex lens emission light, especially the illuminating effect of asymmetric defect (for example gentle slope class defect, mar tool mark defect) is good to small defect, the effect stability that the optional position of work piece in the illumination zone presented is high, applicable in most work surface, can realize work surface defect's high stability, high contrast is examined out, the defect detectable rate improves, detect the cost reduction, do benefit to the improvement of product quality, have very high economic nature, very be fit for using widely in the industry.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an internal schematic view of an embodiment of the present invention, which illustrates an accurate light-emitting device for detection.

Fig. 2 is an overall structure diagram of the accurate light emitting device for detection according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of one form of a diaphragm of the precise light-emitting device for detection according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of another form of a diaphragm of an accurate light-emitting device for detection according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a form of a light emitting surface of an accurate light emitting device for detection according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of another form of a light emitting surface of an accurate light emitting device for detection according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a position of the light emitting surface of the accurate light emitting device for detection according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an arrangement form of the accurate light emitting device for detection with respect to the spectroscope according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of another arrangement form of the accurate light-emitting device for detection with respect to the spectroscope according to an embodiment of the present invention.

Fig. 10 is a schematic view of a light-emitting surface of the first embodiment of the precise light-emitting device for detection according to an embodiment of the present invention.

Fig. 11 is a schematic view of a light-emitting surface of an embodiment of the accurate light-emitting device for detection according to the present invention.

Fig. 12 is a schematic view of a light-emitting surface structure of a form of a third embodiment of an accurate light-emitting device for detection according to an embodiment of the present invention.

Fig. 13 is a schematic view of another light-emitting surface structure of a third embodiment of the precise light-emitting device for detection according to an embodiment of the present invention.

Fig. 14 is a schematic view of a light-emitting surface structure of a third embodiment of an accurate light-emitting device for detection according to an embodiment of the present invention in another form.

Fig. 15 is a schematic structural view of a shallow tool mark, which is one of the slight defects illuminated by the precise light-emitting device according to an embodiment of the present invention.

α in the figure indicates the parallel half angle.

Wherein the reference numerals are as follows:

1. a convex lens; 11. an optical axis; 2. an array of light emitting LED particles; 21. a heat sink; 3. a diffusion plate; 31. a brightness enhancement film; 4. a diaphragm; 41. an inner bore; 5. a light emitting face; 51. a light emitting region; 6. a beam splitter; 7. a workpiece; 71. shallow tool marks.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

In the following description of various examples of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "top," "bottom," "front," "back," "side," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., as to the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

As shown in fig. 1 and fig. 2, the accurate light emitting device for detection in this embodiment includes a light emitting surface 5 and a convex lens 1, where the light emitting surface 5 emits light to the convex lens 1, the light emitting surface 5 includes more than one light emitting regions 51, each light emitting region 51 is not communicated with another light emitting region 51, and each light emitting region 51 emits monochromatic light (red light, green light, white light, etc.) or colored light, and when one light emitting region 51 is provided, the boundary shape of one light emitting region 51 is asymmetric with respect to the optical axis 11 of the convex lens 1; the light emitting areas 51 are more than two and all the light emitting areas 51 emit the same color light, all the light emitting areas 51 are arranged asymmetrically with respect to the optical axis 11 of the convex lens 1; the light emitting areas 51 are more than two and all the light emitting areas 51 emit light of more than two colors, and all the light emitting areas 51 of at least one group of light emitting area groups of the same color are asymmetrically arranged relative to the optical axis 11 of the convex lens 1. The utility model discloses an accurate light-emitting device is used in detection can be applicable to most work pieces, is particularly useful for illuminating the metal surface of work piece, especially the work piece of surface zinc-plating or nickel plating.

In this embodiment, the convex lens 1 of the accurate light emitting device for detection may be only one convex lens, or may be formed by connecting a plurality of convex lens combinations in series, the focal length of the convex lens 1 is a, and the focal length a of the plurality of convex lens combinations in series is the equivalent focal length of the plurality of convex lens combinations; the convex lens 1 can adopt a traditional convex lens and also can adopt a Fresnel lens, the Fresnel lens is preferentially selected in the embodiment, the Fresnel lens is also called a screw lens and is formed by injecting and pressing polyolefin materials, the glass is also arranged, one surface of the lens surface of the Fresnel lens is a smooth surface, and the other surface of the lens surface of the Fresnel lens is a concentric circle from small to large.

In this embodiment, the boundary aperture of the convex lens 1 is D, wherein when the light emitted from the light emitting surface 5 to the convex lens 1 can illuminate the whole convex lens 1, the boundary aperture D depends on the actual size of the convex lens 1, that is, if the convex lens 1 is a circular convex lens 1, the boundary aperture D is the diameter of the circle, if the convex lens 1 is a square convex lens 1, the boundary aperture D is the diameter of the inscribed circle of the square, and if the convex lens 1 is an irregular-shaped convex lens 1, the boundary aperture D is the inscribed circle diameter of the circumscribed rectangle of the irregular shape; when the light emitted from the light emitting surface 5 to the convex lens 1 illuminates only a part of the area of the convex lens 1, the boundary caliber D depends on the illuminated part of the area, and similarly, the illuminated part of the area can be circular, square or irregular, and the corresponding boundary calibers D are respectively the diameter of a circle, the diameter of a square inscribed circle and the diameter of an inscribed circle of an irregular circumscribed rectangle; let T be a/D, the constraint relationship between the focal length a of the convex lens 1 and the boundary aperture D of the convex lens 1 is that T is between 0.25 and 1.5, and D is between 30 mm and 120 mm.

In this embodiment, the distance between the X plane and the focal plane and the distance between the Y plane and the focal plane are each 5mm or less, and the boundary aperture of the convex lens is D, T is a/D and T is between 0.25 and 1.5, and D is between 20 and 200 mm.

In this embodiment, the accurate light emitting device for detection includes a light emitting LED particle array 2 and a diffusion plate 3, the light emitting LED particle array 2 is disposed on one side of a convex lens 1 (in this embodiment, a fresnel lens) corresponding to the convex lens 1, and is configured to project light onto the diffusion plate 3, the light emitting LED particle array 2 may include a plurality of light emitting LEDs, the light emitting LED particle array 2 may be a circular array, an annular array, a square array, or an array with other suitable shapes, and the specific number of the light emitting LEDs and the specific shape of the light emitting LED particle array 2 may be determined according to requirements; the radiator 21 is arranged corresponding to the light-emitting LED particle array 2, and the radiator 21 is used for radiating the light-emitting LED particle array 2 so as to ensure that the light-emitting LED particle array 2 works stably; the diffusion plate 3 is arranged between the convex lens 1 and the light-emitting LED particle array 2 corresponding to the convex lens 1 and is used for diffusing light projected by the light-emitting LED particle array 2 to form diffused light, so that the light angle is richer, the diffusion plate 3 can have different light transmittance according to different materials, and different diffusion effects can be formed according to different frosting degrees of the surface of the diffusion plate; the diffusion plate 3 can be provided with a brightness enhancement film 31 or a prism film in an attached manner, the brightness enhancement film 31 or the prism film is attached to one surface, close to the convex lens 1, of the diffusion plate 3 and used for improving the light ray emergence efficiency of the diffusion plate 3, so that emergent light rays are relatively concentrated, more light rays are transmitted to the lens, the overall brightness is further improved, and the brightness enhancement film 31 or the prism film can be selected from products of American 3M company.

In this embodiment, it is provided with diaphragm 4 selectively to detect with accurate light-emitting device, the diaphragm possesses shading portion and printing opacity part, the light part that realizes directive diaphragm passes partial shading, diaphragm 4 corresponds convex lens 1 and sets up between convex lens 1 and diffuser plate 3, luminous LED granule array 2 and diaphragm 4 are located the both sides of diffuser plate 3 respectively, as shown in fig. 3, diaphragm 4 can have and shelter from blade and hole 41, it can set up a plurality ofly to shelter from the blade, a plurality of blades that shelter from form hole 41 jointly, it is used for sheltering from some light rays to shelter from the blade, another part light can pass through hole 41, diaphragm 4 hole 41 size is adjustable, thereby control light emitting area, light emitting area boundary size or \ and shape, and then adjust the light-emitting effect in order to be suitable for the work piece on different surfaces or the defect of different characteristics. The adjusting mode of the inner hole 41 of the diaphragm 4 can be continuously adjustable as shown in fig. 3 or adjustable as shown in fig. 4, the specific adjusting mode can be set according to actual requirements, the inner hole 41 for light transmission is formed in the insert, a plurality of inserts can be arranged, the sizes of the inner holes 41 of the inserts are different from each other, and the insert adjustment can be realized by replacing inserts with different sizes of the inner holes 41; the diaphragm 4 may be a standard diaphragm or a non-standard diaphragm, or may be other suitable light-shielding member with a light-transmitting hole, and the light-transmitting area of the diaphragm is not limited to a circle or a quasi-circle, and may be a rectangle, a triangle, a sector, an arbitrary polygon, or the like. Meanwhile, the boundary shape and position of the light emitting region may be configured by configuring the shape of the light transmission hole of the diaphragm.

In this embodiment, the light emitting surface 5 of the accurate light emitting device for detection has the following two configurations: firstly, as shown in fig. 5, when the precise light emitting device for detection does not include a diaphragm 4, the light emitting LED particle array 2 projects light onto the diffusion plate 3, the light is brightened by the brightness enhancement film 31 or the prism film attached to the diffusion plate 3 and then is projected onto the convex lens 1, and at this time, the light emitting surface of the diffusion plate 3, that is, the surface where the brightness enhancement film 31 or the prism film is located is the light emitting surface 5; secondly, as shown in fig. 6, when the precise light emitting device for detection includes a diaphragm 4, the light emitting LED particle array 2 projects light onto the diffusion plate 3, the light is brightened by the brightness enhancement film 31 or the prism film attached to the diffusion plate 3 and then emitted, and then a part of the light passes through the inner hole 41 of the diaphragm 4 and then is projected to the convex lens 1, and at this time, the light emitting hole surface defined by the surface of the inner hole 41 of the diaphragm 4 close to the convex lens 1 is a light emitting surface 5. When the diaphragm 4 is a multi-blade adjustable diaphragm, the central plane of the visual blade body in the thickness direction is the position of the luminous surface because the blade is very thin (within 1mm or even 0.5 mm).

In this embodiment, the light-emitting surface 5 may coincide with the focal plane Z of the convex lens 1 (allowing a slight deviation, such as a deviation of ± 2mm or even ± 5mm), as shown in fig. 7, the focal plane Z is a plane passing through the focal point f of the convex lens 1 and perpendicular to the optical axis 11 of the convex lens 1, or the light-emitting surface 5 may be located between an X plane and a Y plane parallel to the focal plane Z, wherein the X plane and the Y plane are respectively located on both sides of the focal plane Z, and the distance E between the X plane and the Y plane and the focal plane Z is less than or equal to a/5, or less than or equal to a/10, or less than or equal to a/20, or less than or equal to a/100, and the distance E between the X plane and the Y plane and the focal plane Z can be set according to actual.

As shown in fig. 8 and fig. 9, in this embodiment, the precise light emitting device for detection is further optionally provided with a spectroscope 6, the spectroscope 6 is disposed on one side of the convex lens 1 away from the light emitting surface 5 and located between the light receiving object and the convex lens 1, the light receiving object may be an illuminated workpiece 7, and the spectroscope 6 may be a flat-plate type transflective lens or a prism type transflective lens, so as to realize that light is reflected when entering from one direction of the spectroscope 6 and is transmitted when entering from another direction; the included angle between the spectroscope 6 and the optical axis 11 of the convex lens 1 can be about 45 degrees, is not strictly limited, and allows the tolerance of plus and minus two degrees, the spectroscope 6 partially reflects the light emitted by the light-emitting surface 5 and penetrating through the convex lens 1 to project on the surface of the light-receiving object, the light is reflected by the surface of the light-receiving object, and the reflected light on the surface of the light-receiving object is transmitted through the spectroscope 6; the accurate light emitting device for detection can have the following two setting forms about the spectroscope 6: one with beam splitter 6 as shown in fig. 8, and two without beam splitter 6 as shown in fig. 9.

In this embodiment, two arbitrary combinations of the two types of arrangement of the light-emitting surface 5 and the two types of arrangement of the spectroscope 6 can be performed, for example, the light-emitting surface 5 is the light-emitting surface 5 when the diaphragm 4 is not included, and the spectroscope 6 is provided; or the luminous surface 5 is the luminous surface 5 when the diaphragm 4 is included and the spectroscope 6 is not arranged; or the luminous surface 5 is the luminous surface 5 without the diaphragm 4 and the spectroscope 6 is not arranged; or the luminous surface 5 is the luminous surface 5 when the diaphragm 4 is included and is provided with the spectroscope 6; the specific setting combination can be determined according to actual requirements.

In this embodiment, the light emitting surface 5 includes more than one light emitting regions 51, the number of the light emitting regions 51 is determined by the number of the light emitting LED particle arrays 2 (for example, may be one array, two arrays or more arrays) or the number of the inner holes 41 of the diaphragm 4, and each light emitting region 51 emits light of a single color, and may also be color light, composite light, or the like. The color of the light in the light emitting region 51 can be determined by the color setting of the light emitting LED particle array 2, or can be determined by the color of the light emitting LED particle array 2 and the filter setting of a specific color (for example, the light emitting color of the light emitting LED particle array 2 is set to white, a red filter is disposed in front of the light emitting LED particle array 2, and the light emitting color of the light emitting region 51 is set to red), the boundary shape of the light emitting region 51 can be selected from various settings, the boundary shape of the light emitting region 51 can be determined by the shape of the light emitting LED particle array 2 or the shape of the hole 41 in the diaphragm 4, or can be determined by the boundary shape of a filter of a specific color (for example, the light emitting color of the light emitting LED particle array 2 is set to white, a fan-shaped red filter is disposed in front, the specific form of the light emitting region 51 arranged asymmetrically with respect to the optical axis 11 of the convex lens 1 is also variously selected; the number, color, boundary shape, and specific form of the light emitting regions 51 disposed asymmetrically with respect to the optical axis 11 of the convex lens 1 will be specifically described by the following three embodiments.

First embodiment

As shown in fig. 10, in this embodiment, the light emitting surface 5 includes only one light emitting region 51, the light emitting region 51 emits monochromatic light to the convex lens 1, the color of the light may be any one of white, red, green and blue, and the specific color of the monochromatic light of the light emitting region 51 includes, but is not limited to, the above examples; the boundary shape of the light emitting region 51 may be any one of a quarter circle, a half circle, a sector, a polygon, and an irregular shape, the sector may include a quarter circle, a half circle, or a sector with other angles, the polygon may include a triangle, a rectangle, or a polygon with other numbers of sides, and the boundary shape of the light emitting region 51 includes, but is not limited to, the above examples, and a quarter circle or a half circle is preferred in this embodiment; the boundary shape of the light emitting region 51 is asymmetrically arranged with respect to the optical axis 11 of the convex lens 1, i.e. the optical axis 11 of the convex lens 1 is not larger than the geometric center of the boundary shape of the light emitting region 51, for example, when the boundary shape of the light emitting region 51 is a quarter circle, the quarter circle may be arranged to deviate from the optical axis 11 of the convex lens 1, or arranged in such a manner that the optical axis 11 of the convex lens 1 passes through the quarter circle, for example, when the boundary shape of the light emitting region 51 is a rectangle, the rectangle may be arranged to deviate from the optical axis 11 of the convex lens 1, or arranged in such a manner that the optical axis 11 of the convex lens 1 passes through a position of the rectangle.

Second embodiment

As shown in fig. 11, in this embodiment, the light emitting surface 5 includes more than two light emitting regions 51, for example, two, three or more light emitting regions 51 may be included, and all light emitting regions 51 of more than two emit light of the same color, which form a group of light emitting regions of the same color, for example, all light emitting regions 51 of more than two emit red light, all light emitting regions 51 of more than two emit green light, or all light emitting regions 51 of more than two emit white light, and the specific colors of all light emitting regions 51 of more than two emit light of the same color include, but are not limited to, the above examples; the boundary shape of any one of the more than two light emitting areas 51 may be any one of a quarter circle, a half circle, a sector, a polygon and an irregular shape, the sector may include a quarter circle, a half circle or a sector with other angles, the polygon may include a triangle, a rectangle or a polygon with other numbers of sides, the boundary shape of any one light emitting area 51 includes but is not limited to the above examples, and the boundary shapes of the light emitting areas 51 in the more than two light emitting areas 51 may be the same or different from each other, for example, the boundary shapes may be the same as a rectangle, or one of the light emitting areas may be a circle and the other is a quarter circle, fig. 11 shows several forms thereof; the group of light-emitting areas of the same color formed by all the light-emitting areas 51 of the two or more light-emitting areas is arranged asymmetrically with respect to the optical axis 11 of the convex lens 1, i.e., if there is central symmetry between all the light emitting regions 51, the optical axis 11 of the convex lens 1 is not beyond the point of symmetry h, for example when more than two light emitting areas 51 are embodied as one circular light emitting area 51 and one quarter circle light emitting area 51, is provided in a form that the optical axis 11 of the convex lens 1 passes through the circular light emitting region 51 as shown in (a) of fig. 11, or in the form of the optical axis 11 of the convex lens 1 passing through the quarter-circle light emitting zone 51, for example when more than two light emitting zones 51 are embodied as two quarter-circle light emitting zones 51 of the same size, and the two quarter-circle light emitting regions 51 are arranged in a form in which the optical axis 11 of the convex lens 1 passes through a position other than the point of symmetry as shown in fig. 11 (g) with central symmetry.

Third embodiment

The different colors are indicated in the figure by different hatching.

In this embodiment, the light emitting surface 5 includes two or more light emitting regions 51, for example, may include two, three or more light emitting regions 51, all of the two or more light emitting regions 51 emit light of two or more colors, any one of the two or more colors may be red, green or blue, and any one of the two or more colors includes, but is not limited to, the above examples; the boundary shape of any one of the two or more light emitting regions 51 may be any one of a quarter circle, a half circle, a sector, a polygon, and an irregular shape, the sector may include a quarter circle, a half circle, or a sector with other angles, the polygon may include a triangle, a rectangle, or a polygon with other numbers of sides, the boundary shape of any one light emitting region 51 includes but is not limited to the above examples, and the boundary shapes of the light emitting regions 51 in the two or more light emitting regions 51 may be the same or different from each other, for example, two light emitting regions 51 may be provided, one of the light emitting regions 51 is a circular light emitting region 51 emitting red light, the other light emitting region 51 is a quarter circle light emitting region 51 emitting green light, and the other light emitting regions 51 may be provided as three rectangular light emitting regions 51 with the same size, but one rectangular light emitting region 51.

At least one group of all the light emitting areas 51 emitting the same color light in the more than two all light emitting areas 51 are asymmetrically arranged relative to the optical axis 11 of the convex lens 1, that is, at least one group of the light emitting areas of the same color is asymmetrically arranged relative to the optical axis of the convex lens. For example, the light emitting surface 5 may include nine light emitting regions 51 as shown in fig. 12, the nine light emitting regions 51 are nine square light emitting regions 51 with the same size, the nine square light emitting regions 51 are arranged in a nine-grid pattern to form a new square, the nine light emitting regions 51 are divided into three groups, the three light emitting regions 51 in each column are in one group, the three light emitting regions 51 in each column are in one rectangle, the three light emitting regions 51 in the first group are arranged to emit red light, the three light emitting regions 51 in the second group are arranged to emit green light, the three light emitting regions 51 in the third group are arranged to emit blue light, the three light emitting regions 51 in the second group are located between the three light emitting regions 51 in the first group and the three light emitting regions 51 in the third group, the optical axis 11 of the convex lens 1 passes through the geometric center of the rectangle formed by the three light emitting regions 51 in the second group, although the three light, the three light emitting regions 51 of the first group emitting red light and the three light emitting regions 51 of the third group emitting blue light are asymmetrically arranged with respect to the optical axis 11 of the convex lens 1.

Alternatively, all the light emitting regions 51 emitting the same color light in each of the two or more light emitting regions 51 are asymmetrically arranged with respect to the optical axis 11 of the convex lens 1, that is, any one group of the light emitting regions emitting the same color is asymmetrically arranged with respect to the optical axis of the convex lens. For example, the light emitting surface 5 includes three light emitting regions 51 as shown in fig. 13, the color of the monochromatic light of each of the three light emitting regions 51 is different, the color of the monochromatic light of a first light emitting region 51 of the three light emitting regions 51 may be red, the color of the monochromatic light of a second light emitting region 51 may be green, the color of the monochromatic light of a third light emitting region 51 may be blue, the three light emitting regions 51 may be three fan-shaped light emitting regions 51 having the same size, the central angles of the three fan-shaped light emitting regions 51 coincide with each other, the three fan-shaped light emitting regions 51 are arranged at equal intervals along the circumference, the central angles of the three fan-shaped light emitting regions 51 may be 120 degrees as shown in (a) of fig. 13 or less than 120 degrees as shown in (b) of fig. 13, the optical axis 11 of the convex lens 1 passes through the coincident central angles of the three fan-shaped light emitting regions, each light emitting region 51 in this arrangement is a group, and each of the three. It is to be noted that the arrangement of the light color of the light emitting regions 51 and the shape of the light emitting regions 51 is not limited to the above example.

For another example, the light emitting surface 5 includes four light emitting regions 51 as shown in fig. 14, each of the four light emitting regions 51 has a different color of monochromatic light, a first light emitting region 51 of the four light emitting regions 51 may have a red color, a second light emitting region 51 may have a green color, a third light emitting region 51 may have a blue color, a fourth light emitting region 51 may have an orange color, the four light emitting regions 51 may have four rectangular light emitting regions 51 with the same size, the four rectangular light emitting regions 51 are arranged in a grid-like manner to form a new rectangle with a larger size, the optical axis 11 of the convex lens 1 passes through the geometric center of the large-size rectangle formed by the four light emitting regions 51, in this arrangement, each light emitting region 51 is a group, and each of the four light emitting regions 51 with different light emitting colors is arranged asymmetrically with respect to the optical axis 11 of the convex lens 1. It is to be noted that the arrangement of the light colors of the four light emitting regions 51 and the shapes of the light emitting regions 51 is not limited to the above example.

During the manufacturing process, the surface of the workpiece 7 often has some slight defects such as scratches or shallow tool marks 71, as shown in fig. 15, the inclination angle of the shallow tool marks 71 is very small relative to the normal surface of the workpiece 7, for example, only 1 to 2 degrees, which is difficult to be revealed under the illumination of the ordinary light source of the asymmetric single-side defect, and the light receiving effect on the surface of the workpiece 7 is significantly improved by the scheme of the present invention including, but not limited to, the asymmetric arrangement of the plurality of light emitting areas 51 of the above embodiment.

The utility model also provides a measuring apparatu, this measuring apparatu include as above arbitrary detection with accurate light-emitting device, detect with accurate light-emitting device be used for to the article projection light that awaits measuring, the measuring apparatu still includes: the carrying device is used for carrying an article to be detected and comprises a bearing table which can be set to be in a dynamic process of conveying the article to be detected; the camera device is configured to take an image of the object to be detected, and the camera device can comprise an industrial detection camera.

The utility model discloses in, detect one or more of light-emitting zone 51 with light emitting area 5 of accurate light-emitting device, through on its border shape or the asymmetric setting of relative convex lens 1 optical axis 11 on the colour overall arrangement, and then to convex lens 1 emission, the illumination zone illumination uniformity of formation is high, the effect stability that work piece 7 optional position in the illumination zone presented is high, applicable in most work piece 7 surface, the illuminating effect to small defect is good, can realize work piece 7 surface defect's high stability, high contrast is examined out, the rate of defect detection improves, detect cost reduction, do benefit to product quality's improvement, has very high economic nature, and is very suitable for using widely in the industry.

It is to be understood by one of ordinary skill in the art that the specific structures and processes shown in the detailed description are exemplary only and not limiting. Moreover, a person skilled in the art can combine the various technical features described above in various possible ways to form new technical solutions, or make other modifications, all of which fall within the scope of the present invention.

Claims

1. The utility model provides a detect with accurate light-emitting device, its characterized in that, detect with accurate light-emitting device includes light emitting area and convex lens, luminous towards convex lens emission light, the light emitting area includes the light emitting area more than one, light emitting area possesses the boundary, at least one light emitting area the boundary is relative convex lens's optical axis asymmetric setting.

2. The apparatus according to claim 1, wherein the light-emitting region is a monochromatic light-emitting region.

3. The light extraction device for detecting precision as claimed in claim 2, wherein the number of the single color light emitting areas is two or more, all the single color light emitting areas of the same color form a group of light emitting areas of the same color, and at least one group of the group of light emitting areas of the same color is arranged asymmetrically with respect to the optical axis of the convex lens.

4. The light extraction device for detecting precision as claimed in claim 3, wherein the number of the light emitting blocks of the same color is two or more.

5. The light emitting device of claim 1, wherein the light emitting surface comprises a light emitting area, the light emitting area emits monochromatic light or colored light to the convex lens, and the boundary of the light emitting area is in the shape of any one of a semicircle, a rectangle, a quarter circle, a sector, a triangle, and a polygon.

6. The apparatus according to claim 2, wherein the light-emitting surface includes three to four monochromatic light-emitting areas, the color of each of the monochromatic light-emitting areas is different, and the boundary of any one of the monochromatic light-emitting areas is disposed asymmetrically with respect to the optical axis of the convex lens.

7. The apparatus according to claim 6, wherein the boundaries of the monochromatic light emitting areas are all fan-shaped or all rectangular.

8. The device of any one of claims 1 to 7, wherein the device comprises an array of light emitting LED particles and a diffuser plate, the array of light emitting LED particles projects light onto the diffuser plate, and a light exit surface of the diffuser plate forms the light emitting surface.

9. The apparatus of claim 8, further comprising a light-emitting surface, wherein the light-emitting LED particle array and the light-emitting surface are respectively disposed on two sides of the diffusion plate, and a light-emitting hole defined by a surface of the light-emitting surface close to the convex lens is the light-emitting surface.

10. The apparatus of claim 9, wherein the aperture has an adjustable inner aperture.

11. The apparatus according to claim 10, wherein a brightness enhancement film or a prism film is attached on the diffuser.

12. The apparatus according to any of claims 1-7, further comprising a beam splitter, wherein the beam splitter is disposed on a side of the convex lens away from the light emitting surface, the beam splitter partially reflects the light emitted from the light emitting surface to project onto a surface of an object to be illuminated, and the reflected light from the surface of the object to be illuminated is transmitted through the beam splitter.

13. The apparatus according to any of claims 1 to 7, wherein the convex lens is a Fresnel lens.

14. The apparatus according to any of claims 1 to 7, wherein the apparatus is used for illuminating a metal surface of a workpiece.

15. The apparatus according to any one of claims 1 to 7, wherein the focal length of the convex lens is A, the light emitting surface is located on the focal plane of the convex lens or between the X-plane and the Y-plane parallel to the focal plane, the X-plane and the Y-plane are respectively located on both sides of the focal plane, and the distance between the X-plane and the Y-plane is less than or equal to A/5.

16. The apparatus according to claim 15, wherein the X-plane and the Y-plane are located on two sides of the focal plane respectively, and the distance between the X-plane and the focal plane is less than or equal to a/10.

17. The apparatus according to claim 16, wherein the X-plane and the Y-plane are located on two sides of the focal plane respectively, and the distance between the X-plane and the focal plane is less than or equal to a/20.

18. The apparatus according to claim 17, wherein the X-plane and the Y-plane are located on two sides of the focal plane respectively, and the distance between the X-plane and the focal plane is less than or equal to a/100.

19. The light extracting device for detecting precision as claimed in claim 15, wherein the aperture of the boundary of the convex lens is D, T ═ a/D, and T is between 0.25 and 1.5.

20. The apparatus of claim 19, wherein D is between 30 and 120 mm.

21. The light-emitting device for detecting with precision according to claim 15,

and, said D is between 20 and 200 mm.

22. A measuring instrument, comprising the accurate light-emitting device for detection as set forth in any one of claims 1 to 21, wherein the accurate light-emitting device for detection is configured to project light to an object to be measured, and the measuring instrument further comprises:

the carrying device is used for carrying the object to be tested;