| 摘要 |
An exposure apparatus having a transparent base member opposed to a photosensitive drum and forming part of a vacuum chamber, an electrode formed in the vacuum chamber for discharging thermoelectrons, a fluorescent member formed on the base member for emitting light when receiving the thermoelectrons, an anode for supplying the fluorescent member with a potential for colliding the thermoelectrons against the fluorescent member, the anode shaping the configuration of light emitted from the fluorescent member, and a microlens formed in the base member in contact with the fluorescent member, for converging onto the photosensitive drum the light emitted from the fluorescent member. When thermoelectrons are discharged from the electrode, the fluorescent member emits light, which has a configuration limited by the anode and is efficiently converged onto the photosensitive drum through the microlens formed in the base member in contact with the fluorescent member, to perform exposure.
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