KR101657521B1 - Apparatus for lighting - Google Patents

Abstract

The present invention relates to an illumination device capable of improving a recognition performance of an object by a vision system by improving a lens that changes light output from a light source, and a vision system having the illumination device. The present invention relates to a light source that outputs light; A lens that receives light output from the light source and outputs light of a line beam; And a support frame supporting the light source and the lens and aligning a direction of the light source and the lens so that the light of the line beam is output in a predetermined direction.

Description

[0001] Apparatus for lighting [0002]

The present invention relates to a lighting apparatus and a vision system including the same. More particularly, the present invention relates to an apparatus for recognizing a target object using a vision system such as an electronic component mounting apparatus, And a vision system including the illumination device.

The vision system can be used to accurately recognize a part to be recognized by a component mounting apparatus or the like. The vision system can illuminate a target object, input an image input from the target object, and recognize or check the target object.

To this end, the vision system may include a light source for emitting light and a camera for receiving an image from the object. At this time, the camera is sensitive to light, so that it may be affected by the illumination of the object. In this case, it may be different depending on the illumination that the camera recognizes the object.

Accordingly, the ability of the camera to recognize the object may be greatly affected by the wavelength, illumination, and brightness of the illumination of the illumination device illuminated by the object.

An object of the present invention is to provide an illumination device capable of improving a recognition performance of an object by a vision system by improving a lens that changes light output from a light source, and a vision system having the illumination device.

The present invention relates to a light source that outputs light; A lens that receives light output from the light source and outputs light of a line beam; And a support frame supporting the light source and the lens and aligning a direction of the light source and the lens so that the light of the line beam is output in a predetermined direction.

The lens may include an incidence side edge facing the light source, and a refraction part including a slope side from the incidence side edge to refract light.

The refracting portion may include a slope from the incident side edge to form a prism.

The lens may further include an extension portion extending from a direction opposite to the incidence side edge of the refraction portion and aligning a direction in which the lens is supported by the support frame.

And the extending portion may be formed by extending a rectangular cross-sectional shape from the refracting portion.

The incidence side edge may be disposed substantially perpendicular to the plane formed by the line beam.

The radius of curvature of the incidence side edge may have any value within a range of 0.1 mm to 0.4 mm.

The refractive index of the lens may be any value within the range of 1.3 to 1.8.

The lens may be formed of at least one material selected from the group consisting of glass, plastic, resin, silicon, and liquid.

The light source may include a laser light source or an LED light source or a halogen light source.

And at least one support bolt inserted from the outside of the support frame and contacting the lens to support the lens to the support frame.

Each of the support bolts may contact each of the upper surface, the lower surface, the left surface, and the right surface of the lens so that the lens is supported on the support frame.

According to another aspect of the present invention, there is provided an illumination device comprising: the illumination device; And a camera for receiving an image formed by the object by the light emitted from the illumination device.

The camera may further include a main body having a rectangular shape on which the camera is housed and on which the image is input.

The illuminating device may be disposed at an edge portion of a surface to which the image of the main body is input.

According to the illumination device and the vision system having the illumination device according to the present invention, it is possible to improve the recognition performance of the object by the vision system by improving the lens that changes the light output from the light source.

FIG. 1 is a perspective view schematically showing an outline of a lighting apparatus according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view showing the respective components of the illumination device of Fig. 1 separated; Fig.
3 is a cross-sectional view schematically showing a section viewed from the cross section III-III in the illumination apparatus of FIG.
Fig. 4 is a diagram showing an outline of a lens having a rectangular prism shape in the illumination apparatus of Fig. 1;
FIG. 5 is a view schematically showing an embodiment of an object to be recognized by the illumination device of FIG. 1. FIG.
FIG. 6 is a view schematically showing an image recognized by two-dimensional illumination irradiated to the object of FIG. 5 by the illumination device of FIG. 1;
FIG. 7 is a perspective view showing the outline of a vision system according to a preferred embodiment of the present invention.
FIG. 8 is a cross-sectional view schematically showing a view from section VIII-VIII in the vision system of FIG. 7; FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a schematic outline of a lighting apparatus 100 according to an embodiment of the present invention. In Fig. 2, the respective components of the illumination device 100 of Fig. 1 are shown separately. Fig. 3 is a sectional view taken along the line III-III in the illumination device 100 of Fig. FIG. 4 shows the outline of a lens 120 having a rectangular prism shape in the illumination device 100 of FIG.

Referring to the drawings, a lighting apparatus 100 according to an embodiment of the present invention includes a light source 110; A lens 120; And a support frame 130.

The light source 110 outputs light. The lens 120 receives light output from the light source and outputs light of a line beam. The support frame 130 supports the light source 110 and the lens 120 and aligns the direction of the light source 110 and the lens 120 so that the light of the line beam is output in a predetermined direction.

According to the present invention, since the light of the line beam is outputted from the lens 120 which changes the light output from the light source 110, the vision system (the light source 110) in which the illumination device 100 according to the embodiment of the present invention is used 7, 10) can improve the recognition performance of the object.

The support frame 130 aligns the direction in which the light source 110 and the lens 120 are oriented so that the light of the line beam can be output in a predetermined direction so that the assembly and alignment of the lens 120 can be facilitated can do.

At this time, the lens 120 may have an incident side edge 121, a refraction portion 122, and an extension portion 123 as shown in Fig.

Here, the incident side edge 121 faces the light source 110, and the opposite end of the refraction portion 122 of the extending portion 123 faces the object to be recognized. In this case, the opposite end surface of the refracting portion 122 of the extending portion 123 may be an exit surface 124 for outputting light in the form of a line beam.

The refraction portion 122 includes an inclined surface from the incident side edge to refract light. At this time, the refracting portion 122 may form a prism including an inclined surface from the incidence side edge.

The extension portion 123 may be formed to extend from the direction opposite to the incidence side edge 121 of the refraction portion 122. At this time, the extended portion 123 has a shape that allows the supporting frame 130 to align the direction in which the lens 120 is supported. In this case, the extension portion 123 may have any shape other than a circular cross-sectional shape.

That is, the extended portion 123 may be supported at a specific position of the support frame 130 in a predetermined direction so that the direction in which the lens 120 is supported is aligned. To this end, an inner square portion may be formed in the housing portion of the lens 120 provided in the support frame 130. At this time, the extension part 123 may be formed to include an outer angular part that is matched with an inner angular part provided in the support frame 130.

In one embodiment, the extended portion 123 may be formed by extending a rectangular cross-sectional shape from the refracting portion 122. In this case, the lens 120 may be formed in a rectangular prism type as shown in FIG. In this case, as shown in FIG. 3, a prismatic support surface on which the prismatic surface of the lens 120 is supported may be formed on the inner surface of the support frame 130.

However, the shape of the extension part 123 of the present invention is not limited thereto, and any shape can be used as long as the light passing through the refraction part 122 extends and is easily supported and aligned in the support frame 130 .

However, when the extended portion 123 has a rectangular cross-sectional shape, it is easy to process, the manufacturing cost is low, and the alignment of the mounting position and direction of the lens 120 is facilitated.

That is, the lens 120 transforms the light output from the light source 110 into a line beam so that the illumination device 100 can output two-dimensional light. For this purpose, the lens 120 may be arranged to be substantially perpendicular to the plane formed by the line beam from which the incident side edge 121 is output.

To this end, the lens 120 may be disposed so that the incident side edge 121 is parallel to the light output surface of the light source 110 and perpendicular to the two-dimensional surface on which the line beam is to be formed. In this case, the accommodating portion for accommodating the lens 120 on the inner surface of the support frame 130 may be provided in such a shape that the incidence side edge 121 can be arranged as described above.

At this time, the position and size of the line beam output from the illumination device 100 can be easily adjusted by the relative position between the light source 110 and the lens 120, the shape and / or size of the lens 120, and the like .

The illumination device 100 includes at least one light source 100 which is inserted from the outside of the support frame 130 and contacts the lens 120 installed inside the support frame 130 to support the lens 120 on the support frame 130. [ The support bolt 140 may be formed of a metal. Therefore, it is possible to easily and firmly support the lens 120 on the support frame 130.

For this purpose, a through hole 140a may be formed in a portion of the support frame 130 where the lens 120 is installed, from the outside to the inside. The support bolt 140 may be inserted through the through hole 140a so that the end of the support bolt 140 contacts the lens 120 to support the lens 120 on the support frame 130. [

At this time, threads may be formed that are mated with each other on the outer circumferential surface of the support bolt 140 and the inner circumferential surface of the through hole 140a. Accordingly, the support bolt 140 can be easily and firmly fastened to the support frame 130. The through hole 140a may be provided at a position where the extension portion 123 of the lens 120 is disposed.

Here, a plurality of support bolts 140 may be provided. In this case, each of the support bolts 140 is contacted with the upper surface, the lower surface, the left surface, and the right surface of the lens 120, respectively, so that the lens 120 can be supported on the support frame 130. At this time, the extended portion 123 is formed to extend in a rectangular cross-sectional shape, and the support bolt 140 may be supported by being in contact with each of the side surfaces excluding the refracting portion 122 side and the emergence surface 124.

In addition, as shown in FIG. 3, a stepped portion having a size smaller than that of the portion where the lens 120 is disposed may be formed at the exit end of the light of the support frame 130. In this case, the lens 120 and the light source 110 may be sequentially inserted from the side where the light source is disposed in the support frame 130. In this case, the lens 120 can be supported by the step portion without being exposed to the emission side.

On the other hand, the lens 120 may be formed such that the radius of curvature of the incident side edge 121 has a value within a range of 0.1 mm to 0.4 mm. Thus, it becomes possible to generate a line beam having a thickness necessary for recognizing the object.

In addition, the lens 120 may be formed such that the refractive index of the lens 120 has a value within a range of 1.3 to 1.8. Thus, it becomes possible to generate a line beam having a thickness necessary for recognizing the object.

The lens 120 may be formed of at least one material selected from the group consisting of glass, plastic, resin, silicon, and liquid. At this time, the plastic material can be a polymer compound that can be molded by applying heat and pressure. That is, the plastic material is made of polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polyamide (PA, nylon) polyester, PES), polyvinyl chloride (PVC), polyurethane (PU), polycarbonate (PC), and polyvinylidene chloride (PVDC) can do.

As the light source 110, a laser light source may be used. In this case, by using the laser light source, it is possible to obtain a line beam of a thin thickness by utilizing the straightness and the convergence of the light.

On the other hand, a normal LED light source is difficult to induce straightness of light. It is also difficult to induce centralization of light. However, in the case of using a laser, it is possible to acquire the irradiation light amount of sharp illumination while reducing the cost, rather than using other optical parts to control the divergence angle of the LED illumination.

In the illumination device 100 according to the embodiment of the present invention, a prism and a cylinder type lens are combined and used without using a normal cylinder type lens as the lens 120, Can be obtained. At this time, the light beam that is aligned and output from the laser of the light source 110 is spread by the cylinder lens, and the width of the beam can be adjusted through the prism. At this time, the width and length of the line beam output from the lens 120 through the prism can be determined.

Such a line beam can produce lighting that can be used for recognition of pins such as connectors, which are difficult to recognize in electronic component mounting equipment. However, the present invention is not limited to this. By using a prism lens according to the present invention as well as a laser light source as the light source 110, even when various light sources such as a normal LED light source or a halogen light source are used, It can produce lighting. In addition, the light source 110 can be used for recognizing various electronic components by using a laser light and a common stage light in combination.

The illumination device 100 according to an embodiment of the present invention can be used to generate two-dimensional illumination in a vision system that recognizes an electronic component in an electronic component mounting apparatus or the like that mounts an electronic component.

In a vision system for recognizing electronic components, a light emitting diode (LED) light source is used or a halogen (HALOGEN) light source is used to irradiate light to an electronic component corresponding to a target object, Parts can be recognized.

In this case, it is possible to mount the recognized electronic component on the electronic circuit board using the recognized electronic component and the arithmetic information of the electronic circuit board. In such an electronic component mounting apparatus, a vision system for recognizing a target object is not necessarily limited to an electronic component mounting apparatus, and can be widely used in an inspection apparatus, an automation apparatus, or various other apparatuses.

The vision system obtains stable electronic part recognition information by using the monochromatic property which is a unique characteristic of the LED light source or by using the operation time for a long time and by using the obtained information, And can be mounted and rotated.

 Conventional mounting equipment, however, mounts electrical and electronic components such as standardized resistors, coils, capacitors, transistors, and electronic chips, or components such as connectors, It mainly uses the light using the LED light source. The LED illumination may be used to correspond to the monochromatic or color of the imaging device depending on the monochromatic characteristic.

Meanwhile, the illumination device 100 according to an embodiment of the present invention may have various channels. The lighting apparatus 100 can be used by constructing a side light, an outward light, a coaxial light, and the like. The illuminating device 100 is a method of illuminating an electronic component to be directly recognized and recognizing the light characteristics reflected from the electronic component. However, the present invention is not limited to this, and may be configured as a back light illumination device for illuminating the back surface of an electronic component to be recognized and digitizing an electronic component to be recognized as a shadow.

Illuminations using an ordinary LED light source and a halogen light source are illuminated in a parabolic cone shape in which the characteristic of the illumination is a predetermined angle with respect to two planar axial directions.

In general, a surface light source such as an LED light source or a halogen light source is irradiated with light up to an unnecessary portion other than the recognition area by the illumination method of the Lux concept, and light noise such as reflected light may be generated have. Therefore, illumination using a normal surface light source makes it difficult to select and recognize a recognition point of a specific portion to be recognized.

However, it is possible to easily generate a line light of a desired thickness by the illumination device 100, so that a two-dimensional line beam is produced not only by laser illumination but also by ordinary LED illumination or halogen illumination, it is possible to easily recognize a specific part such as a pin.

In addition, such light noise may be unnecessary information for information judgment by recognition of electronic parts, and disturbance may occur in the main information to be recognized, which may cause mounting error of mounting equipment. In this case, in order to remove such light noise, a plate material serving as a guide using the reflection property or absorbing property of the optical property using a metal material or a resinous material may be additionally mounted, or a special lens may be used Light can be induced to a specific part.

However, in this case, the installation space due to the additional installed parts can be increased, and the resulting cost can be increased. In addition, when a special lens is used to eliminate the above problem, it is difficult to reduce the size of the single lens, and it is difficult to perfectly adjust the optical path changing and refraction characteristics using the lens.

Further, in the case of using a normal surface light source, it may be difficult to recognize the projected pin information of a specific electronic part. Such PIN information can be a very important factor for inducing high quality of mounting degree of an electronic component to be mounted. However, it is difficult to accurately identify the pin bending information even if the pin information of a connector or the like of an electronic component recognized as an illumination using a normal surface light source is recognized.

However, according to the lighting apparatus 100 according to the embodiment of the present invention, the optical path and the refraction characteristic of the output light can be easily adjusted without a problem such as a space problem and / or a cost problem, Minute information such as information can be easily obtained.

Fig. 5 shows the shape of the audio jack 50, which is an embodiment of the object recognized by the illumination device 100. Fig. Fig. 6 shows an image recognized by two-dimensional illumination irradiated to the audio jack 50 of Fig. 5 by the illumination device 100. Fig.

Referring to the drawings, in the image shown in Fig. 5, the image of the audio jack 50 has other complicated shapes and pin information 51 mixed therein. Therefore, there may be a problem that it is difficult to extract only the pin information 51 from the image shown in Fig. However, as shown in Fig. 6, the image recognized by the illumination device 100 includes the pin information 51a recognized by the two-dimensional illumination in a state that is easily distinguishable.

Therefore, according to the illumination apparatus 100 according to the embodiment of the present invention, the pin position can be more accurately detected by the pin information 51a by the two-dimensional line beam illumination. Therefore, when the electronic component is mounted on the printed circuit board, accuracy can be improved and the component mounting work performance can be improved.

FIG. 7 shows the outline of a vision system 10 according to a preferred embodiment of the present invention. FIG. 8 shows the vision system 10 as viewed in section VIII-VIII.

Referring to the drawings, vision system 10 includes a lighting device 100; And a camera 220. At this time, the illumination device 100 and the camera 220 may be mounted on the main body 200 of the vision system 10.

The illumination apparatus 100 may be the illumination apparatus shown in Figs. 1 to 6. Fig. The camera 220 can receive an image formed by the object by the light emitted from the illumination device 100. [

The main body 200 houses the camera 220 therein, and the surface on which the image is input may have a rectangular shape. In this case, the illumination device 100 may be mounted on a corner portion of a surface to which an image having a rectangular shape of the main body 200 is input.

At this time, the illumination device 100 is mounted on the upper surface of the main body 200, and can irradiate the target object with two-dimensional light in the form of a line beam. In this case, by attaching to the rectangular corner portion of the illumination device 100, the size of the recognized component can be enlarged.

In addition, more accurate pin information can be obtained by irradiating light at the corner portion of the upper surface of the main body 200 to prevent the fins included in the object from being covered with each other.

In this case, the light of the line beam is outputted from the lens 120 that changes the light output from the light source 110 of the illumination device 100, so that the illumination device 100 according to the embodiment of the present invention is used. The recognition performance of the object by the system 10 can be improved.

The support frame 130 aligns the direction in which the light source 110 and the lens 120 are oriented so that the light of the line beam can be output in a predetermined direction so that the assembly and alignment of the lens 120 can be facilitated can do.

According to the present invention, by improving the lens that changes the light output from the light source, the recognition performance of the object by the vision system can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: vision system, 100: lighting device,
110: light source, 120: lens,
130: support frame, 140: support bolt,
200: main body, 210: LED lighting,
220: Camera.

Claims (15)

A light source for outputting light;
A lens that receives light output from the light source and outputs light of a line beam;
A support frame supporting the light source and the lens and aligning a direction of the light source and the lens so that the light of the line beam is output in a predetermined direction; And
And at least one support bolt inserted from the outside of the support frame and contacting the lens to support the lens to the support frame,
The lens,
An incident side edge facing the light source;
A refracting portion including an inclined surface from the incident side edge to refract light; And
And an extension portion extending from a direction opposite to the incidence side edge of the refraction portion and allowing the supporting frame to align the direction in which the lens is supported,
Wherein the supporting portion is formed with a rectangular cross-sectional shape extending from the refracting portion, an inner surface of the supporting frame is formed with an angular support surface for supporting the extending portion, and the supporting bolt is provided in contact with the surface of the extending portion. . delete The method according to claim 1,
Wherein the refracting portion includes a slope from the incident side edge to form a prism. delete delete delete delete delete delete delete delete delete delete delete delete

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