Ricoh Company, Ltd.

Hiroshi Andoh

Shigeru Morinaga

Genichiro Kawamichi

Takeo Shirato

Hideharu Miki

Kohji Tokuyama

Toshihide Inaba

Mitsuyuki Karasawa

A device for detecting a state of a liquid droplet discharged from each of nozzles placed in one or more rows, includes a light emitting element to emit a light beam to the liquid droplet from a nozzle in question, and a pair of light receiving elements disposed on both sides of a beam diameter of the light beam via an optical axis to receive scattered light occurring from the liquid droplet for detecting a state of the discharged liquid droplet on the basis of the scattered light. Either of the pair of the light receiving elements is selected for receiving the scattered light from the liquid droplet discharged from the nozzle according to a positional relation between the nozzle and the pair of light receiving elements.

Device and method for detecting state of discharged liquid droplet and image forming device incorporating such device

A liquid discharge state detection device includes a light emitting element that emits a light beam; and a light receiving element that is placed at a position shifted from a beam diameter of the light beam. The light receiving element receives scattered light generated when the light beam collides with a liquid droplet. A discharge state of the liquid droplet is detected based on a received light amount of the received scattered light. The liquid discharge state detection device further includes an analyzer in the forward direction from the light receiving element. The analyzer detects the scattered light having a polarization direction the same as a polarization direction of the light beam emitted by the light emitting element. The light receiving element receives the scattered light that has passed through the analyzer.

Liquid discharge state detection device and image forming apparatus

Growing community of inventors

Ibaraki, Japan

Hiroshi Andoh