CN102252269A - Method for configuring light source and reflecting surface of lighting system and use thereof - Google Patents

Abstract

A method for configuring light source and reflecting surface of lighting system features that the lighting system has multiple elliptical reflecting surfaces with common focus, and a light source is arranged at another focus of each elliptical reflecting surface to make each light source emit light toward its correspondent elliptical reflecting surface. The light beams of different light sources are converged at the common focus point by utilizing the plurality of elliptical reflecting surfaces of the common focus point, so that the light beams can be concentrated, the illumination brightness is increased, and the light beams enter the common focus point from different angles, so that the object to be illuminated near the common focus point can obtain illumination light of various angles, and when the light beam of a certain angle is shielded, the light beams of other angles can provide the illumination light of the object to be illuminated.

Description

Configuration method and use of light source and reflective surface of lighting system

technical field

The invention relates to a configuration method of a light source and a reflective surface of an illumination system and its use, in particular to an illumination system with multiple elliptical reflective surfaces having a common focus and its use.

Background technique

In many fields, it is necessary to use an illumination system to illuminate a specific object or a specific area so as to observe the surface morphology of the specific object or specific area. For example, in an automatic optical inspection system, it is necessary to use an illumination system to illuminate the object under test (such as a circuit board), so that the image capture device can capture an image of the surface of the object under test. Another example is during surgical operations, it is necessary to strengthen the illumination of the patient's surgical site so that the doctor can clearly see the body tissue of the surgical site and make a correct medical judgment. In addition, when ordinary people read, they usually also use desk lamps to assist in enhancing the lighting of the reading area.

However, in the existing lighting systems, the angle of light irradiation is usually limited to a small angle range, and because the light is traveling in a straight line, if the surface of a specific object or a specific area to be illuminated has unevenness, its concave may be blocked. The protruding part is blocked and cannot be illuminated, and the concave part is shadowed and cannot be observed. Or, for example, during a doctor's operation, the light may be blocked by the doctor's hands or surgical tools, causing partial shadows on the patient's surgical site. Similarly, the general desk lamp must be adjusted to the specific position of the user to avoid being blocked by the body, but due to space constraints, the desk lamp cannot be placed in the best position at any time, so it is often impossible to avoid the light being blocked Condition.

Contents of the invention

An object of the present invention is to provide a configuration method for a light source and a reflective surface of an illumination system capable of providing illumination from multiple angles for an object to be illuminated.

Another object of the present invention is to provide an illumination system for automatic optical inspection equipment using the aforementioned configuration method.

Another object of the present invention is to provide an illuminating device using the aforementioned configuration method.

According to a preferred embodiment of the present invention, the configuration method of the light source and reflective surface of the lighting system of the present invention makes the lighting system have a plurality of elliptical reflective surfaces with confocal points, and a light source is arranged at the other focal point of each elliptical reflective surface , so that each light source emits light toward each corresponding elliptical reflective surface, and the light rays converge at the common focus after being reflected.

According to a specific example of the present invention, the present invention is used in an illumination system of automatic optical inspection equipment. The inspection equipment includes an image capture device and a detection area, and the image capture device captures an image of an object under test located in the detection area; The lighting system includes: two reflectors and two light sources. The two reflectors are respectively located on both sides of the line connecting the image capture device to the detection area. Each reflector has an elliptical reflective surface, and the two elliptical reflective surfaces are confocal, and the confocal point is located in the detection area. The two light sources are respectively located at the other focal point corresponding to each elliptical reflective surface, and the light emitted by each light source is reflected by each corresponding elliptical reflective surface to irradiate the detection area.

According to another specific example of the present invention, the lighting device of the present invention includes: a cover body and a plurality of light sources. The cover body has a plurality of elliptical reflective surfaces with confocal points. The light sources are arranged respectively corresponding to the elliptical reflective surfaces and located at the other focus thereof, and the light emitted by each light source is reflected by the corresponding elliptical reflective surfaces and converges at the common focal point.

The beneficial effect of the present invention is that: the rays of different light sources are converged at the common focus by using a plurality of elliptical reflective surfaces of the common focus, which not only can concentrate the light and increase the illumination brightness, but also the light is incident at the common focus from different angles, making it possible to The object to be illuminated near the confocal point can be illuminated from a variety of angles, so that when the light from a certain angle is blocked, there are still lights from other angles that can provide illumination to the object to be illuminated.

Description of drawings

Fig. 1 is a schematic diagram of a preferred embodiment of the configuration method of the light source and the reflecting surface of the lighting system of the present invention;

Fig. 2 is a schematic side view illustrating the first specific example of the configuration method of the light source and reflective surface of the lighting system, which is used in the lighting system of automatic optical inspection equipment;

FIG. 3 is a schematic cross-sectional view illustrating a second specific example of the arrangement method of the light source and the reflective surface of the lighting system, which is used in a lighting device.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, a preferred embodiment of the configuration method of the light source and the reflecting surface of the lighting system of the present invention makes the lighting system 1 have a plurality of elliptical reflecting surfaces 11 with a confocal point 10, and at another focal point of each elliptical reflecting surface 11 (that is, where the light source 12 is installed, not otherwise labeled) is provided with a light source 12, so that each light source 12 emits light toward each corresponding elliptical reflective surface 11, and the light converges at the confocal point 10 after reflection. In this preferred embodiment, among the four elliptical reflective surfaces 11 shown in FIG. The eccentricities can also be the same or all different, and are not limited to this preferred embodiment. That is to say, the eccentricities of the elliptical reflective surfaces 11 may be the same or not all (that is, some of them may be the same, some of them may be different, or all of them may be different). Converging the light at the confocal point 10 through a plurality of elliptical reflective surfaces 11, the light can be directed to the confocal point 10 from different directions, so objects located near the confocal point 10 can be irradiated by light from different angles to avoid a single The disadvantage of being blocked by angle light, that is, not being able to illuminate effectively. The number of elliptical reflective surfaces 11 can be set according to usage requirements, so as to achieve multi-angle lighting effects.

Preferably, light-emitting diodes can be used as the light-emitting components of each light source 12, and each light source 12 can have at least one light-emitting diode, for example, a light bar can be composed of a plurality of light-emitting diodes, and the number of light-emitting diodes that each light source 12 has can be determined according to its corresponding The size of the elliptical reflective surface 11 depends. The use of light-emitting diodes has the advantages of energy saving and environmental protection, and the elliptical reflective surface 11 has the characteristics of reflecting the light emitted at one focal point to another focal point. Through multiple elliptical reflective surfaces 11 at the same focal point, the light can be collected and energy can be obtained. Increase light utilization and lighting brightness.

It is worth noting that, for the sake of convenience of description, Fig. 1 only illustrates the relative relationship between the elliptical reflective surface 11 and the light source 12 in a plane schematic diagram. In three-dimensional space, the elliptical reflective surface 11 can be a part of an elliptical cylinder or a part of an elliptical sphere .

Referring to FIG. 2 , the first specific example of the configuration method of the light source and reflective surface using the aforementioned lighting system in the present invention is the lighting system 2 for automatic optical inspection equipment. The inspection equipment (not labeled in the figure) includes an image capture device 31 and a detection area 32 , and the image capture device 31 captures an image of a test object 33 located in the detection area 32 . The lighting system 2 includes: two reflectors 21 and two light sources 22 . The two reflectors 21 are respectively located on both sides of the line I connecting the image capture device 31 to the detection area 32. Each reflector 21 has an elliptical reflective surface 211, and the two elliptical reflective surfaces 211 are confocal, and the confocal point is located in the detection area. 32. The two light sources 22 are respectively located at the other focal point corresponding to each elliptical reflective surface 211. In this specific example, each light source 22 and its corresponding elliptical reflective surface 211 are respectively located at the line I connecting the image capture device 31 to the detection area 32. On both sides, the light emitted by each light source 22 is reflected by each corresponding elliptical reflective surface 211 , and then irradiates the detection area 32 (ie, the common focal point of the two elliptical reflective surfaces 211 ). The object 33 to be tested can be irradiated by light from different directions (that is, different angles) when it is located in the detection area 32, so that the concave and convex parts of the surface contour of the object 33 to be tested can be irradiated with light from different angles, so as to avoid blind spots in the detection caused by the shading of the recesses . In this first specific example, the eccentricities of the two elliptical reflective surfaces 211 are the same, each light source 22 has a plurality of light emitting diodes (not shown in the figure), and the light emitting diodes are arranged to form light bars facing the opposite elliptical reflective surface 211 Setting, Fig. 2 is a schematic side view, the elliptical reflective surface 211 and the light emitting diode light bar extend along the direction perpendicular to the drawing surface, and can form a straight strip-shaped illumination range on the detection area 32, which is suitable for detecting the circuit of the printed circuit board.

Referring to FIG. 3 , the second specific example of the arrangement method of the light source and reflective surface using the aforementioned lighting system of the present invention is a lighting device 4 , which includes: a cover 41 and a plurality of light sources 42 . The cover body 41 has a plurality of elliptical reflective surfaces 411 having the same focal point 40 . Each light source 42 is arranged corresponding to each elliptical reflective surface 411 and is located at its other focal point (that is, the light source 42, not labeled separately). 40 confocal points. In this second specific example, the eccentricities of the elliptical reflective surfaces 411 are all different, and each light source 42 has a plurality of light emitting diodes (not shown in the figure), and the light emitting diodes are arranged to form light bars and are arranged towards the opposite elliptical reflective surface 411 , the type and light emitting direction of the light source 42 can be adjusted according to requirements. The lighting device 4 can be used as a general desk lamp, a surgical desk lamp and other lighting appliances that require concentrated lighting. It can gather the light of multiple light sources 42 in a specific area to provide better lighting brightness and has multi-angle lighting. It can avoid the situation that the light at a single angle is blocked, that is, the light cannot be illuminated.

To sum up, the configuration method of the light source and the reflective surface of the lighting system of the present invention can concentrate the light to improve the lighting brightness, and can provide more angles of lighting, which can avoid the situation that the light from a single angle is blocked, that is, the light cannot be illuminated. Can reach the purpose of the present invention.

Claims (9)

1. A configuration method for a light source and a reflective surface of an illumination system, characterized in that: the illumination system has a plurality of elliptical reflective surfaces with confocal points, and a light source is arranged at another focal point of each of the elliptical reflective surfaces, so that Each of the light sources emits light toward each of the corresponding elliptical reflective surfaces, and the light rays converge at the common focal point after being reflected. 2. The arrangement method of the light source and the reflecting surface of the lighting system according to claim 1, characterized in that: the eccentricities of the elliptical reflecting surfaces are the same. 3. The arrangement method of the light source and the reflective surface of the lighting system according to claim 1, wherein the eccentricities of the elliptical reflective surfaces are not all the same. 4. The configuration method of the light source and the reflective surface of the lighting system according to any one of claims 1 to 3, characterized in that each light source has at least one light emitting diode. 5. An illumination system for automatic optical inspection equipment, the inspection equipment includes an image capture device and a detection area, and the image capture device captures an image of an object under test located in the detection area; it is characterized in that : The lighting system includes: Two reflectors, respectively located on both sides of the line connecting the image capture device to the detection area, each of the reflectors has an elliptical reflective surface, and the two elliptical reflective surfaces are confocal, and the confocal point is located in the detection area; Two light sources are respectively located at the other focal point corresponding to each of the elliptical reflective surfaces, and the light emitted by each of the light sources is reflected by each of the corresponding elliptical reflective surfaces to irradiate the detection area. 6 . The lighting system according to claim 5 , wherein each light source and its corresponding elliptical reflective surface are respectively located on two sides of a line connecting the image capture device to the detection area. 7 . 7. A lighting device; it is characterized in that: the lighting device comprises: A cover body having a plurality of elliptical reflective surfaces with confocal points; A plurality of light sources are arranged corresponding to each of the elliptical reflective surfaces and located at the other focal point thereof, and the light emitted by each of the light sources is reflected by the corresponding elliptical reflective surfaces and converges at the common focal point. 8. The lighting device according to claim 7, wherein the eccentricities of the elliptical reflecting surfaces are not all the same. 9. The lighting device according to claim 7, wherein each of the light sources has at least one light emitting diode.

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