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US 6,661,445 B2Granted
Exposure apparatus with an array of light emitting devices
AssigneeCanon Kabushiki Kaisha
InventorsSeiji Mashimo, Noboru Koumura, Yukio Nagase, Yuichi Hashimoto, Akihiro Senoo, Kazunori Ueno
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Abstract
An exposure apparatus performs exposure of a photosensitive body by an array of light emitting devices to form an image as a latent image thereon. The array of light emitting devices incorporate micro-optical cavities. The micro-optical cavities limit wavelengths of light emitted from the array of light emitting devices, so that the wavelength at a peak of emitted light is in a half width region of sensitivity versus wavelength of the photosensitive body.
Claims3
An exposure apparatus for exposing a photosensitive body comprising:
- a substrate,
- a convex lens disposed on said substrate,
- a semitransparent reflection layer disposed on said convex lens, and
- a pair of electrodes, and a light-emitting layer between said pair of electrodes, disposed on said semitransparent reflection layer,
- wherein said semitransparent reflection layer and said pair of electrodes and said light-emitting layer each has a curved shape corresponding to a curved shape of said convex lens, and a luminescent point of light is provided between said electrodes only inside a curved portion of said lens, and wherein one of said electrodes is a cathode and the portion of said apparatus between said cathode and said semitransparent layer constitutes a micro-resonator which limits wavelengths of light emitted from said light emitting layer so that a peak wavelength of the emitted light is disposed within a half-value width region of sensitivity of the photosensitive body.
2 more elements
Dependencies are inferred from the claim text.