Back to results
US 7,466,498 B2Granted
Exposure device
AssigneeFUJIFILM Corporation
InventorsKenichi Saito, Toshiro Hayakawa, Kenji Matsumoto, Yoshinori Morimoto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFUJIFILM Corporation
InventorsKenichi Saito, Toshiro Hayakawa, Kenji Matsumoto, Yoshinori Morimoto
Estimating the term…
In an exposure device, a beam emitted from a light emitting point of a laser diode (LD) is limited by a slit. The slit limits a light beam in a direction orthogonal to an active layer of the LD. The exposure device has a moving mechanism which moves a plate in which the slit is provided, in a direction orthogonal to the plate. Object points are different at a beam and at flare light. Therefore, the plate is provided in a vicinity of the light emitting point in order to limit the light beam in the vicinity of the light emitting point, i.e., at a place near a point where a beam spot is smallest, and to be able to effectively block only the flare light.
An exposure device using a GaN blue semiconductor laser as a light source, comprising:
An exposure device using a GaN blue semiconductor laser as a light source, wherein, given that a numerical aperture of a coupling lens nearest to a light emitting surface of an active layer of the blue semiconductor laser is NA and a spread angle of a beam from the light emitting surface is α, the exposure device is structured so as to satisfy:
An exposure device which uses a GaN blue semiconductor laser as a light source, and which forms an image by irradiated light irradiated from the GaN blue semiconductor laser onto a photosensitive material using a silver halide, and which carries out gradation expression of the image by controlling a driving current of the GaN blue semiconductor laser and modulating an emission intensity of the irradiated light, wherein
An exposure device which uses a GaN blue semiconductor laser as a light source, and which forms an image by irradiated light irradiated from the GaN blue semiconductor laser onto a photosensitive material using a silver halide, and which carries out gradation expression of the image by controlling a driving current of the GaN blue semiconductor laser and modulating an emission intensity of the irradiated light, wherein
Dependencies are inferred from the claim text.