JP2002296198A - Illuminating device in curved surface property inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device in a curved surface property inspection apparatus that can secure a lower illuminating angle necessary for improvement of inspection accuracy even if an illuminating device is made small-sized. SOLUTION: The inspection apparatus 10 includes a main illuminating part 11 arranged over the surface of an assembled board 110 carried in with a predetermined clearance H for illuminating the surface of the board 110 by a plurality of color lights, each light having a different illuminating angle from each other, a color camera 12 for separately imaging each color light reflected off the surface of the board 110 which the color lights illuminate, and a compensatory illuminating part 13 for illuminating the surface of the board 110 by one of the color lights from a side direction of the board 110 at a lower illuminating angle than that of the main illuminating part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a curved surface property inspection apparatus such as a mounting board inspection apparatus for inspecting a tilt angle of solder.

[0002]

2. Description of the Related Art Conventionally, as a mounting board inspection apparatus for inspecting a tilt angle of a solder, one disclosed in Japanese Patent Publication No. 6-1173 is known.
As shown in FIG. 9, is a solder tester of the color highlight system, which is arranged with a predetermined clearance H on the surface of the mounting substrate 110 which is the object to be inspected, and A three-color illumination unit 120 that irradiates three hue lights so that the hue light irradiation angles are different.
Then, the color camera 130 that captures the reflected light of each hue light irradiated on the surface of the mounting substrate 110 for each hue light and the hue light irradiated by the three-color illumination unit 120 are combined to be white light. A light amount adjustment unit 140 that adjusts the amount of each hue light emitted by the three-color illumination unit 120;
And an image processing unit 150 that detects the inclination angle of the solder on the surface of the mounting substrate 110 from the imaging pattern obtained in step S0.

The three-color illuminating unit 120 is composed of three ring-shaped fluorescent lamps, and is provided below the red fluorescent lamp 121 with a 20 W red (R) fluorescent lamp 121 for emitting red phase light. And a 30 W green (G) fluorescent lamp 122 for emitting green phase light, and a 30 W blue (B) fluorescent lamp 12 provided below the green fluorescent lamp 122 and emitting blue phase light
And 3.

In such a mounting board inspection apparatus 100,
Since the mounting substrate 110 to be inspected is sequentially transported, it is necessary to secure a clearance H of at least 20 mm between the three-color illumination unit 120 and the mounting substrate 110.

Further, in order to improve the inspection accuracy of the solder state on the surface of the mounting board 110, it is necessary to lower the irradiation angle. As a method for lowering the irradiation angle, as shown in FIG. A method of increasing the outer dimensions of the blue fluorescent lamp 123 is adopted.

The external dimensions of the 30 W blue fluorescent lamp 123 are φ
By increasing it to 220 mm, the clearance H becomes 20
mm, the lowermost blue fluorescent lamp 12
The irradiation angle range of No. 3 is 15 degrees.

As described above, by setting the irradiation angle range of the lowermost blue fluorescent lamp 123 to 15 degrees, the solder state on the surface of the mounting substrate 110 can be inspected with high accuracy.

Here, the relationship between the irradiation angle and the irradiation area in a general mounting board inspection apparatus will be described. Figure 1
2 (1) and (2) are explanatory diagrams showing the relationship between the irradiation angle and the irradiation area in a general mounting board inspection apparatus.

In (1) and (2) of FIG. 12, the mounting component 111 is mounted on the mounting substrate 110 by soldering, and the mounting substrate inspection apparatus irradiates the surface of the mounting substrate 110 with hue light. When the solder inspection is performed in accordance with the reflected light, the irradiation area of the solder 112 on the mounting board 110 from the area A to the area E differs depending on the irradiation angle of the hue light.

For example, if the irradiation angle is 60 degrees, A
When only the region is irradiated, when the irradiation angle is 45 degrees, the region A to the region B is irradiated. When the irradiation angle is 30 degrees, the region A to the region C is irradiated, and the irradiation angle is 15 degrees. In this case, irradiation can be performed from the region A to the region D, and when the irradiation angle is set to 0 degree, irradiation can be performed from the region A to the region E. In other words, it can be seen that the lower the irradiation angle is, the larger the area to be irradiated with the hue light is, and therefore the inspection accuracy of the solder is significantly increased.

However, recently, the mounting board inspection apparatus 1
As the size of the illumination device used in the mounting board inspection apparatus 100 has been reduced, the size of the illumination device has also been reduced. FIG. 10 is an explanatory diagram showing a schematic configuration of a conventional mounting board inspection device using such a downsized lighting device. Note that the same components as those of the mounting board inspection apparatus shown in FIG. 9 are denoted by the same reference numerals, and description of the configurations and operations is omitted.

A mounting board inspection apparatus 100A shown in FIG.
In addition to the light amount adjustment unit 140 and the image processing unit 150, the X-Y
It has a three-color illumination unit 120A and a color camera 130A that move in the axial direction.

The three-color illumination unit 120A has a ring-shaped
A 9 W red fluorescent lamp 121A configured to emit red phase light, and a 9 W green fluorescent lamp 1 provided below the red fluorescent lamp 121A and configured to emit green phase light.
22A and a 9-W blue fluorescent lamp 123A that is provided below the green fluorescent lamp 122A and emits blue phase light.

Similarly, in such a mounting board inspection apparatus 100A, the mounting board 1 to be inspected is mounted.
10 are sequentially conveyed, it is necessary to secure a clearance H of at least 20 mm between the three-color illumination unit 120A and the mounting board 110.

Assuming that the outer diameter φ of the 9W blue fluorescent lamp 123A is 120 mm and the clearance is 20 mm, the irradiation angle of the lowermost blue fluorescent lamp 123A is 26 degrees.

The surface of the mounting board 110 is
The three-color illumination unit 120A and the color camera 130 in the Y-axis direction
By making A movable, the state of solder on the surface of the mounting board 100 can be inspected.

Further, since the three-color illumination unit 120A used in the conventional mounting board inspection apparatus 100A is formed of a ring-shaped fluorescent lamp, it is difficult to further reduce the size of the three-color illumination unit 120A.

Therefore, the mounting board inspection apparatus 1 shown in FIG.
00B is a red LED 121B, a green LED 122B, and a blue LED instead of a three-color illuminating unit that is a ring-shaped fluorescent lamp.
The size of the lighting device is reduced by using a three-color LED lighting unit 120B composed of 123B. In this case, the case outer diameter φ of the three-color LED lighting unit 120B is set to 100 m.
m, clearance H is 20 mm, blue LED1
The irradiation angle of 23A is 26 degrees.

[0019]

However, the above-described conventional mounting board inspection apparatus 100 (100A, 100A)
According to the lighting device used in B), for example, if the lighting device such as the three-color lighting unit 120A and the three-color LED unit 120B is downsized, the irradiation angle of the hue light cannot be reduced. Since the area becomes smaller, there is a problem that the inspection accuracy on the surface of the mounting substrate is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to secure a low irradiation angle necessary for improving the inspection accuracy even if the illumination device is downsized. It is an object of the present invention to provide an illuminating device for a curved surface property inspection device that can perform the above.

[0021]

In order to achieve the above object, an illumination device for a curved surface property inspection apparatus according to the present invention comprises a plurality of illumination devices provided on a surface of an inspection object with different irradiation angles to the surface. Illuminating means for irradiating the hue light, and imaging means for imaging the reflected light of each hue light illuminated on the surface of the inspection object for each hue light, and for each hue light obtained by the imaging means. An illumination device of a curved surface property inspection device for detecting an inclination angle of a curved surface of an object to be inspected from an imaging pattern of the object, wherein the illumination means emits one hue light among a plurality of hue lights to be irradiated by the illumination means. It has a compensation illumination means for irradiating the surface of the inspection object from the side surface direction of the inspection object at an irradiation angle lower than the illumination angle of the inspection object surface.

The inspection object corresponds to, for example, a mounting board in a mounting board inspection apparatus. The illuminating unit corresponds to, for example, a main illuminating unit that irradiates hue light to the mounting board. Further, the image pickup means corresponds to, for example, a color camera or a black and white camera.

[0023] The compensating illumination means may emit one hue light of the plurality of hue lights emitted by the illumination means at an irradiation angle lower than the irradiation angle of the illumination means on the surface of the inspection object. The illumination unit irradiates the surface of the inspection target object from the side surface direction of the inspection target object, for example, corresponds to a compensation illumination unit. The irradiation angle on the surface of the inspection object by the illumination unit is, for example, 26 degrees or more, and the irradiation angle on the surface of the inspection object by the compensation illumination unit is, for example, less than 26 degrees.

With this configuration, the compensation illuminating means emits one of the plurality of hue lights illuminated by the illuminating means at an irradiation angle lower than the illuminating angle of the illuminating means on the surface of the inspection object. It is possible to irradiate the surface of the object to be inspected from the side direction of the object to be inspected, and to obtain a low irradiation angle required for improving the inspection accuracy on the surface of the object to be inspected, even if the illumination means is downsized. be able to.

Further, the illumination device of the curved surface property inspection apparatus according to the present invention has a moving means for moving the compensating lighting means so as to be able to move up and down in the direction of irradiation of the hue light by the lighting means. When bringing in the inspection object, raise the compensation lighting means, and after bringing in the inspection object,
The compensation illumination means is lowered.

The moving means corresponds to, for example, a compensating elevating drive unit for moving the compensating lighting means so as to be able to move up and down.

With this configuration, when the inspection object is carried in, the compensation illumination means can be raised, and after the inspection object is carried in, the compensation illumination means can be lowered. The inspection object can be carried in smoothly.

Further, the illumination device of the curved surface property inspection apparatus according to the present invention adjusts the amount of each hue light irradiated by the illumination means so as to become white light by synthesizing each hue light irradiated by the illumination means. Light amount adjusting means, and the light amount adjusting means adjusts the light amount of the hue light irradiated by the compensation illuminating means so that the hue light illuminated by the compensating illuminating means becomes white light by combining the respective hue lights illuminated by the illuminating means and the compensating illuminating means A compensation light amount adjusting means for adjusting is provided.

The light amount adjusting means is a main illumination light amount for adjusting the light amount of each hue light irradiated by the illuminating means so that white light is obtained by synthesizing the respective hue lights illuminated by the illuminating means so as to obtain a white balance. It corresponds to a control unit.
The compensation light amount adjusting means adjusts the light amount of the hue light irradiated by the compensation lighting means, and corresponds to, for example, a compensation illumination light amount control unit.

With this configuration, the amount of hue light emitted by the compensation lighting means can be adjusted so that the respective hue lights emitted by the lighting means and the compensation lighting means are combined into white light. In addition, the white balance can always be ensured.

Further, in the illumination device of the curved surface property inspection apparatus according to the present invention, the compensation light amount adjusting means divides the irradiation area of the illumination means into a plurality of areas, and irradiates each of these areas with the illumination means and the compensation illumination means. The amount of light irradiated by the compensation illumination means is adjusted so that white light is obtained by combining the respective hue lights.

The irradiation area corresponds to an inspection area in a mounting board when, for example, an illumination device is used in a mounting board inspection apparatus.

With this configuration, the irradiation area of the illumination means is divided into a plurality of areas, and for each of these areas, white light is obtained by combining respective hue lights irradiated by the illumination means and the compensation illumination means.
Since the amount of hue light irradiated by the compensation illumination means can be adjusted, white balance can be ensured for each of these areas.

In the illumination device of the curved surface property inspection apparatus according to the present invention, the compensation illumination means has an optical fiber, and the surface of the inspection object is irradiated with hue light through the optical fiber.

With this configuration, the irradiation angle can be flexibly changed.

In the illumination device of the curved surface property inspection apparatus according to the present invention, the illumination means may include a first illuminant for irradiating the first hue light, a second illuminant for irradiating the second hue light, and a third illuminant. A third illuminant for irradiating the hue light, and the compensating illumination means emits the same hue light as the third hue light emitted by the third illuminant to the third
There is a compensation illuminant that irradiates the surface of the inspection object with an irradiation angle lower than the irradiation angle of the illuminant on the surface of the inspection object.

The illuminating means includes a first luminous body for irradiating the first hue light, a second luminous body provided below the first luminous body and irradiating the second hue light, and a second luminous body. A third light-emitting body that is provided at the lower part of the body and emits the third hue light may be used.

The first luminous body corresponds to, for example, a red fluorescent lamp, the second luminous body corresponds to a green fluorescent lamp, the third luminous body corresponds to a blue fluorescent lamp, and the compensation luminous body corresponds to a blue LED or a blue fluorescent lamp. It is.

With this configuration, the illuminating means is reduced in size, and even in a place where the third illuminant can irradiate only at a high irradiation angle, the compensation illuminant can improve the inspection accuracy of the third hue light on the surface of the mounting board. Irradiation at a low irradiation angle required for

In the illumination device of the curved surface property inspection apparatus according to the present invention, the first hue light is red hue light, the second hue light is green hue light, and the third hue light is blue hue light.

With this configuration, it is possible to adopt a color highlight system.

Further, the illumination device of the curved surface property inspection apparatus according to the present invention comprises an illumination means for irradiating the surface of the object to be inspected with light at different irradiation angles to the surface, and a surface of the object to be inspected. An image pickup means for individually picking up reflected light of each light irradiated thereon, and an illumination of a curved surface property inspection apparatus for detecting an inclination angle of a curved surface of an object to be inspected from an image pickup pattern obtained by the image pickup means An imaging unit comprising a black-and-white camera, wherein the illuminating unit comprises a main illuminating unit composed of a plurality of same-color illuminants having different irradiation angles, and the main illuminating unit illuminating the surface of the inspection object. A compensation lighting unit that irradiates the surface of the object to be inspected from the side direction of the object to be inspected at an irradiation angle lower than the irradiation angle, and is composed of the same color light emitter and the same hue light emitter as the main illumination unit. Switching of the lighting device for each same color illuminant of the main lighting section Together are sequentially turned on by switching, upon irradiation of the low irradiation angle is the most the same color light emitter, in which so as to irradiate the light emitting body of the compensation lighting unit.

With this configuration, if a red light emitter (red LED or the like) is used as the light emitter of the same color, a black and white camera may be used as the image pickup means. It can be effective.

Further, in the illumination device of the curved surface property inspection apparatus according to the present invention, the object to be inspected is a mounting substrate, and the inclination angle of the curved surface of the object to be inspected is the soldering angle of the mounting component mounted on the mounting substrate. Is the inclination angle.

With this configuration, it is possible to provide an illumination device for a mounting board inspection device capable of securing a low irradiation angle required for improving inspection accuracy even if the illumination device is downsized.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lighting device of a mounting board inspection apparatus as a curved surface property inspection apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a mounting board inspection apparatus 10 as a curved surface property inspection apparatus according to the present invention is a mounting board inspection apparatus of a color highlight system, and is a mounted board 110 which is a loaded inspection object. The main illuminating unit 11, which is an illuminating unit that irradiates a plurality of hue lights so as to irradiate a plurality of hue lights onto the surface of the mounting board 110 at different angles, and A color camera 12 which is an imaging means for imaging the reflected light of each hue light illuminated on the surface for each hue light, and one hue light among a plurality of hue lights illuminated by the main illuminating unit 11; And a compensation illuminating unit 13 that illuminates the surface of the mounting substrate 110 from the side direction of the mounting substrate 110 at an irradiation angle lower than the irradiation angle of the surface of the mounting substrate 110 by There.

The main illuminator 11 is a first illuminator for irradiating red phase light.
A red fluorescent lamp 11A that is a red light emitter as a light emitter,
A green fluorescent lamp 11B which is provided below the red fluorescent lamp 11A and is a green luminous body as a second luminous body which radiates green phase light, and is provided below the green fluorescent lamp 11B and radiates blue phase light And a blue fluorescent lamp 11C, which is a blue light emitter as a third light emitter.

The compensating illumination unit 13 irradiates the surface of the mounting substrate 110 from the side of the mounting substrate 110 at an irradiation angle lower than the irradiation angle of the blue phase light from the blue fluorescent lamp 11C to the surface of the mounting substrate 110. LED 13A, which is a luminous body for use. The compensation LED 1
3A is constituted by a blue LED since the lowermost fluorescent lamp is a blue fluorescent lamp 11C in order to make it the same as the hue light emitted by the lowermost fluorescent lamp.

The mounting board inspection apparatus 10 has an inspection area 14 which is an irradiation area on which a mounting board 110 which is an object to be inspected carried in is placed.
4 is a central area 14A and a plurality of outer peripheral areas (divided areas) 1
4B, and a camera illumination unit 15 including the main illumination unit 11 and the color camera 12 within the inspection area 14.
Move in the X-Y axis direction of the inspection area 14.

Further, a predetermined clearance H between the mounting board 110 placed in the inspection area 14 and the main illuminating section 11 is set.
Is used to facilitate loading and unloading of the mounting substrate 110.
mm.

Further, the compensation illumination unit 13 includes an inspection area 14.
Are arranged so as to be able to move up and down in response to the driving of a compensating elevating drive unit, which is a moving means to be described later, and when ascending, the compensating illumination unit 11 is raised by 20 mm. In other words, when loading or unloading the mounting board 110 into or from the mounting board inspection apparatus 10, the compensation illumination unit 13 is raised, and after loading the mounting board 110 into the inspection area 14 of the mounting board inspection apparatus 10, compensation is performed. The lighting unit 13 is lowered.

FIG. 4 is a block diagram showing a schematic configuration inside the mounting board inspection apparatus 10. This mounting board inspection device 10
Is a camera illumination drive unit 16 that moves a camera illumination unit 15 composed of a color camera 12 and a main illumination unit 11 in the X-Y axis direction within the inspection area 14, and a camera illumination position that controls the position of the camera illumination unit 15. A control unit 17 and a camera illumination drive power supply unit 18 for supplying power to the camera illumination unit 15
A main illumination power supply 19 for supplying electric power to the main illumination unit 11 in the camera illumination unit 15; and a main illumination which is a light amount adjusting unit for controlling the main illumination power supply unit 19 to adjust the light intensity of the main illumination unit 11. A light amount control unit 20, a compensation elevation drive unit 21 which is a moving unit for elevating and lowering the compensation illumination unit 13, and a compensation elevation drive power supply unit 22 for supplying power to the compensation elevation unit 21
A compensating illumination power supply unit 23 for supplying power to the compensating illumination unit 13, and a compensating light amount adjusting unit for controlling the compensating illumination power supply unit 23 to adjust the light amount of the compensating illumination unit 13. An illumination light amount control unit 24, an image processing unit 25 including an image memory and performing various image processing on a color camera signal captured by the color camera 12, a memory unit 26 storing various information, and a mounting board inspection And a CPU 27 for controlling the entire apparatus 10.

The image processing unit 25 captures an image of a reference white reference plate by the color camera 12 of the camera illumination unit 15 and measures the white balance (RGB balance) of the white reference plate based on the color camera signal. The image processing unit 25 performs not only the measurement of white balance (RGB balance) but also various image processing.

The camera illumination position control unit 17 controls the inspection area 14
The central area 14A and the divided area 14B are stored as position data, and by setting the position data in the camera illumination drive section 16, the camera illumination section 11 can be accurately moved to each area.

The memory unit 26 includes a CPU 27, which will be described later.
, The position data of the divided area 14B and each divided area 1
The light amount of the compensation illumination unit 13 with the white balance at 4B is stored in association with each other.

Next, the operation of the mounting board inspection apparatus 10 according to the present embodiment will be described.

FIG. 3 is an explanatory diagram showing an operation state of the mounting board inspection apparatus 10 shown in this embodiment. In FIG. 3, the mounting board inspection apparatus 10 raises the compensation illumination unit 13 to a predetermined clearance H through the compensation elevation drive unit 21, and carries the mounting board 110 into the inspection area 14. Descend.

In the mounting board inspection apparatus 10, the camera illuminating unit 15 moves in the XY axis direction on the surface of the mounting board 110 carried into the inspection area 14, and the camera illuminating unit 1
5 illuminates the surface of the mounting substrate 110.

Further, the compensating illumination unit 13 includes the main illumination unit 1
The blue phase light emitted by the light emitting device 1 is emitted from the side surface of the mounting substrate 110 to the surface of the mounting substrate 110 at an irradiation angle lower than the irradiation angle of the main illumination unit 11 onto the surface of the mounting substrate 110.

In the compensation illumination section 13 shown in FIG.
The irradiation angle on one side is 15 degrees and the irradiation angle on the other side is 6 degrees, so that a low irradiation angle required for improving the inspection accuracy of the inclination angle of the solder 112 in the mounting component 111 on the surface of the mounting board 110 can be obtained. .

As described above, according to the present embodiment, the same blue-phase light as the blue-phase light emitted by blue fluorescent lamp 11C of main illuminator 11 is applied to the surface of mounting substrate 110 by main illuminator 11. Since the compensating illumination unit 13 that irradiates the surface of the mounting substrate 110 from the side surface direction of the mounting substrate 110 at an irradiation angle lower than the angle is provided, even if the main illumination unit 11 is downsized, the surface of the mounting substrate 110 can be reduced. Upper mounted component 11
1, a low irradiation angle required for improving the inspection accuracy of the inclination angle of the solder 112 can be obtained.

However, as shown in FIG. 2, the mounting board inspection apparatus 10 according to the present embodiment, in the central area 14A and the divided area 14B in the inspection area 14, The influence rate is different, and the divided area 14B is greatly affected by the hue light radiated by the compensation lighting unit 13. Therefore, the screen is strongly affected by the blue hue light radiated by the compensation lighting unit 13, so that the screen becomes dark. It turns blue.

Therefore, in the mounting board inspection apparatus 10 according to the present embodiment, the divided area 14B in the inspection area 14
The white balance adjustment processing as shown in FIG. 5 is performed so that the white balance can be obtained.

FIG. 5 shows a CP relating to the white balance adjustment processing in the mounting board inspection apparatus 10 according to the present embodiment.
It is a flowchart which shows the processing operation of U27.

The white balance adjustment processing shown in FIG.
Before the mounting board inspection is performed, the light amount of the compensation illuminating unit 13 in which the white balance is obtained in each divided area 14B, which is performed via the PU 27, is associated with the position data of the divided area 14B in the memory unit. 26 is also performed.

In FIG. 5, the CPU 27 raises the compensation illumination unit 13 to a predetermined clearance H through the compensation elevation drive unit 21 (step S11). After the white reference plate is carried into the inspection area 14 in the mounting board inspection apparatus 10 from the predetermined clearance H (Step S12),
The compensating illumination unit 13 is lowered through the compensating elevating drive unit 21 (step S13).

Next, the CPU 27 controls the main illumination light amount control unit 2.
The standard lighting of the main lighting unit 11 is performed through the main power supply unit 0 (step S14). Note that the standard lighting of the main lighting unit 11 is a standard amount of light and a red phase light of the red fluorescent lamp 11A,
The green phase light of the green fluorescent lamp 11B and the blue phase light of the blue fluorescent lamp 11C are respectively radiated.

Further, the CPU 27 turns on the compensation illuminating section 13 as standard through the compensation light quantity control section 24 and the compensation illuminating power supply section 23 (step S15). The standard lighting of the compensation illumination unit 13 means that the compensation LED 1 has a standard light amount.
3A is irradiated with blue phase light.

Next, the CPU 27 searches the camera illumination position control section 17 for position data corresponding to the central area 14A of the inspection area 14, and stores this position data in the camera illumination drive section 1.
6, the camera illumination unit 15 is moved to the central area 14.
A is moved to A (step S16).

The CPU 27 captures an image of the white reference plate in the central area 14A through the color camera 12 of the camera illuminating section 15 and performs image processing on the color camera signal to measure the white balance in the central area 14A. (Step S17).

Further, the CPU 27 adjusts the light quantity of the main lighting section 11 through the main lighting light quantity control section 20 and the main lighting power supply section 19 to obtain a white balance in the central area 14A (step S18). The current light amount of the main illumination unit 11 in the area 14A is stored in the memory unit 26 in association with the position data of the central area 14A (step S19).

Next, the CPU 27 searches the position data of a certain divided area 14B through the camera illumination position control unit 17, sets this position data in the camera illumination drive unit 16, and sets the camera illumination unit 15 to the corresponding divided area 14B. (Step S20).

The CPU 27 captures an image of the white reference plate in the corresponding divided area 14B through the color camera 12 of the camera illumination unit 15 and performs image processing on the color camera signal to measure the white balance in the corresponding divided area 14B. (Step S21).

Further, the CPU 27 adjusts the light amount of the compensation illumination unit 13 through the compensation illumination light amount control unit 24 and the compensation illumination power supply unit 23, and obtains a white balance in the corresponding divided area 14B (step S22). Then, the current light amount of the compensation illumination unit 13 in the corresponding divided region 14B is stored in the memory unit 26 in association with the position data of the corresponding divided region 14B (step S23). It should be noted that the adjustment of the light quantity of the compensation lighting unit 13 is usually blue due to the influence of the compensation lighting unit 13, so that the white balance can be obtained by reducing the gain.

Further, the CPU 27 operates the compensation illumination unit 13.
It is determined whether or not there is a divided area 14B that does not store the light quantity (step S24). If there is no divided area 14B in which the light quantity is not stored, it is determined that the light quantity of the compensation illumination unit 13 in all the divided areas 14B in the inspection area 14A is stored in the memory unit 27, and this processing operation is ended. .

If the divided area 14B in which the light amount of the compensation illumination unit 13 is not stored still remains, the CPU 27 proceeds to step S20 to move the camera illumination unit 15 to the next divided area 14B. Transition.

As described above, according to the white balance adjustment processing shown in FIG. 5, the inspection area 14 is determined based on the white reference plate.
The light amount of the compensation illumination unit 13 with the white balance in each of the divided areas 14 </ b> B can be stored in the memory unit 26.

As described above, according to the present embodiment, the light quantity of the compensation illuminating unit 13 in which the white balance is obtained in each of the divided areas 14B in the inspection area 14 is determined with reference to the white reference plate. Since the data is stored in the memory unit 26 in association with the position data, when the camera illumination unit 15 moves to the divided area 14B during the execution of the mounting board inspection, the corresponding divided data stored in the memory unit 26 is stored. By adjusting the light amount of the compensation lighting unit 13 based on the light amount corresponding to the area 14B, it is possible to quickly perform the compensation operation while compensating for variations in white balance due to the provision of the compensation lighting unit 13. it can.

According to the present embodiment, the same blue-phase light as the blue-phase light emitted from main illuminating unit 11 is mounted at an irradiation angle lower than the irradiation angle of main illuminating unit 11 on the surface of mounting substrate 110. Since the compensation illumination unit 13 that irradiates the surface of the mounting substrate 110 from the side surface direction of the substrate 110 is provided, even if the main illumination unit 11 is downsized, the inclination angle of the solder 112 in the mounting component 11 on the surface of the mounting substrate 110 It is possible to obtain a low irradiation angle required for improving the inspection accuracy of the device.

In the above embodiment, the main lighting section 11 is constituted by the red fluorescent lamp 11A, the green fluorescent lamp 11B and the blue fluorescent lamp 11C, and the compensating lighting section 13 is constituted by the compensating blue LED 13A. However, as shown in FIG. 6, the main illuminating unit 11 is illuminated with a red LED 31A and a green LED 31B.
With the blue LED 31C, it is needless to say that the entire mounting board inspection apparatus 10 can be reduced in size, and the same effect as in the above embodiment can be obtained.

In the above-described embodiment, the main lighting section 11 is constituted by the red fluorescent lamp 11A, the green fluorescent lamp 11B and the blue fluorescent lamp 11C, and the compensating lighting section 13 is constituted by the compensating blue LED 13A. However, as shown in FIG.
B and a blue LED 31C, and the compensating illumination unit 13 is composed of an optical fiber 13B.
In this configuration, the entire mounting board inspection apparatus 10 can be downsized, and the optical fiber 13B
Is used, it is needless to say that the irradiation angle can be flexibly changed, and the same effect as in the above embodiment can be obtained.

In the above embodiment, the mounting board inspection apparatus 10 of the color highlight system has been described. However, instead of the color camera 12, a monochrome camera 12A as shown in FIG. In this case, the movable main illuminating unit 11 is provided with red LEDs 32A, 32 which are the same color illuminants (red illuminants) having three different irradiation angles.
B, 32C, the compensating illumination unit 13 is constituted by a red LED 13C, and for each type of red LED 32A, 32B, 32C of the main illumination unit 11, these red LEDs are
The switching unit 34 of the lighting device 33 for lighting the 32A (32B, 32C) is switched on and turned on, and when the red LED 32C having the lowest irradiation angle is irradiated, the red L of the compensation lighting unit 13 is turned on.
By irradiating the ED 13C, the same effect can be obtained even in the black and white method.

In the above-described embodiment, when loading or unloading the mounting board 110 into or from the mounting board inspection apparatus 10, the compensating illumination unit 13 can be moved up and down by the compensating elevating drive unit 21. If it is ensured that the mounting substrate 110 is carried into the apparatus 14, not the entirety of the compensation lighting unit 13 but only a part thereof, for example, only the compensation lighting unit 13D shown in FIG. Is also good.

Further, in the above embodiment, the compensating illumination section 13 is constituted by the compensating LED 13A, but may be constituted by a straight tube fluorescent lamp.

In the above embodiment, the camera illuminator 15 can be moved in the XY axis direction of the inspection area 14. However, it goes without saying that the same effect can be obtained even in a fixed system.

[0087]

As described above, according to the illumination device of the curved surface property inspection apparatus according to the present invention, one hue light of a plurality of hue lights irradiated by the illumination means is compensated by the compensation illumination means. Even when the illumination unit can be illuminated from the side direction of the object to be inspected at a lower illumination angle than the illumination angle to the surface of the object to be inspected by the illumination unit, even if the illumination unit is downsized. In addition, a low irradiation angle required for improving the inspection accuracy on the surface of the inspection target can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic structural explanatory view of a mounting board inspection apparatus as an embodiment of a curved surface property inspection apparatus having an illumination device according to the present invention.

FIG. 2 is a plan view showing a schematic configuration of the mounting board inspection apparatus.

FIG. 3 is an explanatory diagram showing an operation state of the mounting board inspection apparatus.

FIG. 4 is a block diagram showing a schematic configuration inside the mounting board inspection apparatus.

FIG. 5 is a flowchart showing a processing operation of a CPU relating to white balance adjustment processing of the mounting board inspection apparatus.

FIG. 6 is a schematic structural explanatory view of a mounting board inspection apparatus as another embodiment of the curved surface property inspection apparatus having the illumination device according to the present invention.

FIG. 7 is a schematic structural explanatory view of a mounting board inspection apparatus as another embodiment of the curved surface property inspection apparatus having the illumination device according to the present invention.

FIG. 8 is a schematic structural explanatory view of a mounting board inspection apparatus as another embodiment of the curved surface property inspection apparatus having the illumination device according to the present invention.

FIG. 9 is a schematic structural explanatory view of a mounting board inspection device using a conventional lighting device.

FIG. 10 is a schematic diagram illustrating the configuration of a mounting board inspection apparatus using a conventional illumination device (small three-color illumination unit).

FIG. 11 is a schematic configuration explanatory view of a mounting board inspection device using a conventional lighting device (LED three-color lighting unit).

FIG. 12 shows a relationship between an irradiation angle and an irradiation area of hue light in a general mounting board inspection apparatus, (1) is a plan view,
(2) is a side view.

[Explanation of symbols]

Reference Signs List 10 mounting board inspection device (curved surface property inspection device) 11 main illumination unit (illumination unit) 11A red fluorescent lamp (first illuminant) 11B green fluorescent lamp (second illuminant) 11C blue fluorescent lamp (third illuminant) 12 Color camera (imaging means) 13 Compensation lighting section (compensation lighting means) 13A Compensation LED (compensation light emitter) 13B Optical fiber 14 Inspection area (irradiation area) 14A Central area 14B Outer circumference area (divided area) 15 Camera illumination Unit 17 Camera illumination position control unit 18 Camera illumination drive power supply unit 19 Main illumination power supply unit 20 Main illumination light amount control unit (light amount adjustment unit) 21 Compensation elevation drive unit (moving unit) 24 Compensation illumination light amount control unit (compensation light amount) Adjustment means) 25 image processing unit 26 memory unit 27 CPU 110 mounting board (inspection target) 111 mounting component 112 solder

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Claims (10)

[Claims] An illumination unit configured to irradiate a plurality of hue lights onto the surface of the inspection object at different irradiation angles to the surface; An image pickup unit for picking up reflected light for each hue light, and an illuminating device of a curved surface property inspection device for detecting an inclination angle of a curved surface of the inspection object from an image pickup pattern for each hue light obtained by the image pickup unit The illumination unit emits one hue light among a plurality of hue lights to be illuminated at an irradiation angle lower than an illumination angle of the illumination unit on a surface of the inspection object, and An illumination device for a curved surface property inspection device, comprising: a compensation illumination means for irradiating a surface of the inspection target object from a side surface direction of the object. 2. A moving means for moving the compensation illuminating means so as to be able to move up and down in an irradiation direction of hue light by the illuminating means, wherein the moving means, when loading the inspection object,
2. The illumination device of the curved surface property inspection device according to claim 1, wherein the compensation illumination unit is raised, and after the inspection object is carried in, the compensation illumination unit is lowered. 3. 3. A light quantity adjusting means for adjusting the light quantity of each hue light illuminated by the lighting means so as to be white light by synthesizing each hue light illuminated by the lighting means, However, a compensating light amount adjusting means for adjusting the light amount of the hue light irradiated by the compensating lighting means so that white light is obtained by combining the respective hue lights irradiated by the lighting means and the compensating lighting means. Claim 1 or Claim 2
The lighting device of the curved surface property inspection device according to 1. 4. The compensating light quantity adjusting means divides an irradiation area of the lighting means into a plurality of areas, and for each of these areas, combines the respective hue lights irradiated by the lighting means and the compensating lighting means to produce white light. The illumination device of the curved surface property inspection device according to claim 3, wherein the light amount of the hue light irradiated by the compensation illumination means is adjusted so that 5. The curved surface property inspection according to claim 1, wherein the compensation illumination means has an optical fiber, and irradiates the surface of the inspection object with hue light through the optical fiber. The lighting device of the device. 6. The illuminating means has a first illuminant for irradiating a first hue light, a second illuminant for irradiating a second hue light, and a third illuminant for irradiating a third hue light. And wherein the compensation illuminating means is configured to irradiate the third illuminant with a third illuminant.
The same hue light as the hue light, at an irradiation angle lower than the irradiation angle of the third light emitter on the surface of the inspection object,
The illumination device for a curved surface property inspection device according to any one of claims 1 to 5, further comprising a compensation light emitter that irradiates a surface of the inspection object. 7. The illuminating means includes: the first illuminant for irradiating the first hue light; and the second illuminant provided below the first illuminant and irradiating the second hue light. The lighting device of the curved surface property inspection device according to claim 6, further comprising: a third light emitter provided below the second light emitter and irradiating the third hue light. 8. The curved surface inspection apparatus according to claim 6, wherein the first hue light is red hue light, the second hue light is green hue light, and the third hue light is blue hue light. Lighting equipment. 9. An illuminating means for irradiating the surface of the object to be inspected with light at different irradiation angles to the surface, and reflecting the reflected light of each light illuminated on the surface of the object to be inspected separately. A lighting device for a curved surface property inspection device for detecting an inclination angle of a curved surface of the inspection object from an imaging pattern obtained by the imaging device. A main illuminator configured by a camera, wherein the illuminating unit is configured by a plurality of same-color illuminants having different illuminating angles, and an illuminating angle lower than an illuminating angle of the main illuminating unit on the surface of the inspection object. A compensating illumination unit configured to irradiate the surface of the inspection target object from a side surface direction of the inspection target object and to include the same color light emitter of the main illumination unit and a light emitter of the same hue light. And switching the same color illuminant of the main illumination unit to a switching unit of a lighting device. Together sequentially turned by the switching, upon irradiation of the low irradiation angle is the most the same color light emitter, the illumination device of the curved surface property inspection apparatus is characterized in that so as to irradiate the light emitter of the compensating lighting unit. 10. The object to be inspected is a mounting board, and the angle of inclination of a curved surface of the object to be inspected is an angle of inclination of a solder in a mounted component mounted on the mounting board. Item 10. An illumination device for a curved surface property inspection device according to any one of Items 9.