Component mounting apparatus and method for photographing component

1. A component mounting apparatus, comprising:

a nozzle which sucks a component;

a nozzle supporting member, on which the nozzle is installed, which moves in a vertical direction with respect to an upper surface of a substrate on which the component sucked at the nozzle is mounted;

an optical system which captures an image of a leading edge portion of the nozzle where the component is sucked in a component mounting operation, from a side direction, such that an optical axis of the optical system is inclined at a predetermined angle with respect to a sucking surface of the nozzle;

an analyzer which analyzes the image of the leading edge portion to determine whether a sucking state of the component sucked by the nozzle is normal or abnormal;

a pixel rate storage which stores pixel rate data which is obtained by capturing an image of the component when the component is normally sucked prior to the component mounting operation, by the nozzle by using the optical system; and

an image corrector which corrects image data of the component in the image of the leading edge portion captured in the component mounting operation, by using the pixel rate data stored in the pixel rate data storage.

2. The apparatus of claim 1 , wherein the optical axis of the optical system is inclined at an angle predetermined between 4° and 40° upward with respect to the sucking surface of the nozzle, which is a horizontal surface.

3. The apparatus of claim 1 , wherein the analyzer determines whether the sucking state is normal or abnormal by analyzing a height of the component determined from the image of the leading edge portion.

4. The apparatus of claim 3 , wherein the optical axis of the optical system is inclined at a predetermined angle θ, and

wherein the analyzer determines that the sucking state is normal if a vertical length of the component in the image of the leading edge portion is substantially equal to T(sin θ+cos θ), where T is a thickness of the component.

5. The apparatus of claim 1 , wherein the optical system illuminates light into the leading edge portion of the nozzle along the optical axis, and obtains the image of the leading edge portion by reflection of the light at the leading edge portion.

6. A component mounting apparatus comprising:

a nozzle supporting member on which a nozzle for sucking a component is installed;

an optical system which is fixed on the nozzle supporting member for capturing simultaneously an image of an upper surface and a side surface of the component in a component mounting operation;

an analyzer which analyzes the image to determine whether a sucking state of the component sucked by the nozzle is normal or abnormal;

a pixel rate storage which stores pixel rate data which is obtained by capturing an image of the component when the component is normally sucked prior to the component mounting operation, by the nozzle by using the optical system; and

an image corrector which corrects image data of the component in the image of the leading edge portion captured in the component mounting operation, by using the pixel rate data stored in the pixel rate data storage.

7. The apparatus of claim 6 , wherein the upper surface of the component is a sucking surface of the nozzle.

8. The apparatus of claim 6 , wherein the analyzer determines whether the sucking state is normal or abnormal by analyzing a height of the component from the image of the upper surface and the side surface of the component.

9. The apparatus of claim 8 , wherein the optical axis of the optical system is inclined at a predetermined angle θ, and

wherein the analyzer determines that the sucking state is normal if a vertical length of the component in the image of the leading edge portion is substantially equal to T(sin θ+cos θ), where T is a thickness of the component.