Component mounter, nozzle imaging method

A component mounter, comprising:

• a first imaging system including a first illuminator configured to irradiate light of a first wavelength toward a first imaging position, a first filter configured to limit the transmission of light of a second wavelength different from the first wavelength while allowing the transmission of the light of the first wavelength, and a first imaging unit which faces the first imaging position is configured to receive light incident thereon from the first imaging position by a first imaging device;
• a second imaging system including a second illuminator configured to irradiate light of the second wavelength toward a second imaging position different from the first imaging position, a second filter configured to limit the transmission of the light of the first wavelength while allowing the transmission of the light of the second wavelength, and a second imaging unit which faces second imaging position is configured to receive light incident thereon from the second imaging position by a second imaging device;
• a mounting head configured to hold a component by a nozzle of a plurality of nozzles, position the nozzle at the first imaging position and position the nozzle at the second imaging position;
• two nozzle facing parts arranged to sandwich two of the nozzles;
• a light diffusing member;
• a control unit configured to control the first imaging system and the second imaging system, wherein
• the first imaging unit is arranged at one side of the mounting head and faces the first imaging position provided with respect to a side surface of the mounting head on the one side;
• the second imaging unit is arranged at other side of the mounting head opposite to the one side and faces the second imaging position provided with respect to a surface of the mounting head on the other side;
• the first illuminator irradiates the light toward the first imaging position from the other side of the mounting head and the second illuminator irradiates the light toward the second imaging position from the one side of the mounting head;
• the first imaging system images the nozzle located at the first imaging position in a horizontal direction by receiving the light transmitted through the first filter after being irradiated to the first imaging position from the first illuminator by the first imaging device of the first imaging unit;
• the second imaging system images the nozzle located at the second imaging position in a horizontal direction by receiving the light transmitted through the second filter after being irradiated to the second imaging position from the second illuminator by the second imaging device of the second imaging unit;
• two of the nozzles are so arranged in the mounting head as to satisfy an arrangement relationship that an other of the nozzles is located at the second imaging position at the same time as one of the nozzles is located at the first imaging position;
• the light diffusing member is arranged between the one of the nozzles located at the first imaging position and the other of the nozzles located at the second imaging position;
• the light emitted from the first illuminator is irradiated to the first imaging position after being diffused by the light diffusing member;
• the light emitted from the second illuminator is irradiated to the second imaging position after being diffused by the light diffusing member;
• among the two nozzle facing parts, a first window facing to the first imaging position is provided in the nozzle facing part on the one side and a second window facing to the second imaging position is provided in the nozzle facing part on the other side;
• the first imaging unit receives light incident thereon from the first imaging position to the first window by the first imaging device;
• the second imaging unit receives light incident thereon from the second imaging position to the second window by the second imaging device;
• among the two nozzle facing parts, the second illuminator is arranged at the nozzle facing part on the one side and the first illuminator is arranged at the nozzle facing part on the other side;
• and
• the control unit simultaneously performs the imaging of the one of the nozzles located at the first imaging position by the first imaging system and the imaging of the other of the nozzles located at the second imaging position by the second imaging system.