Exposure head and image forming apparatus using the same

Details Exposure head and image forming apparatus using the same Exposure head and image forming apparatus using the same

2006-01-24

2006-01-24

Yan, Ren (Department: 2854)

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

C347S236000

Reexamination Certificate

active

06989849

ABSTRACT:
An exposure head is provided in which light beams from light emitting parts63pass through a transparent substrate62and are projected on an image carrier. The transparent substrate62has plain faces substantially parallel to each other, one of the faces being a face on which the light emitting parts63are formed and the other being a face from which light beams are projected. The transparent substrate62is provided, at position(s) other than the face on which the light emitting parts63are formed and than the face from which light beams are projected, with light quantity detecting means100for detecting the quantity of light emitted from said light emitting parts63. In the exposure head in which the light emitting parts of organic EL light emitting elements are aligned into array configuration on the transparent substrate, the light quantity detecting means is disposed on an end face of the transparent substrate and light beams totally reflected at the projection-side face of the transparent substrate are introduced to the light quantity detecting means, thereby effectively detecting the quantity of light of the light emitting elements and thus providing improved accuracy of detecting the quantity of light.

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