Color image exposure apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorTakaaki Terashita
Life of this patent
Estimating the term…
Abstract
A color image exposure apparatus with improved color reproducibility is disclosed. The improved color reproducibility has been achieved by using for exposure only those rays having a substantially uniform angle distribution relative to an optical axis. In order to perform exposure by the above rays, rays substantially parallel to the optical axis are caused to enter a filter coated with a dielectric multilayer film or, as an alternative, rays substantially parallel to the optical axis only are chosen from rays emitted through the filter. Since rays near an enlarging master lens are substantially parallel to the optical axis, an optical member coated with a dielectric multilayer film may be arranged in the vicinity of the master lens.
Claims18
A color image exposure apparatus for obtaining a color picture from a color original, comprising:
- a color-light limiting means arranged in an optical path of light emitted from a light source and provided with a dielectric multilayer film for limiting color light around at least a wavelength band in which a blue light wavelength range and a green light wavelength range overlap;
- an exposure control means having yellow, magenta and cyan color-light control filters for color light which has transmitted through or has been reflected by the color-light limiting means and has transmitted through or has been reflected by the color original, said filters being inserted in the optical path to control the exposure of each of three primary-color-sensitive layers in a copying color-sensitive material;
- and
- a guide means for irradiating, as copying light, only those rays having an angle in a predetermined range relative to an optical axis of the light source out of rays transmitted through or reflected by the color-light limiting means provided with the dielectric multilayer film.
A color image exposure apparatus for obtaining a color picture from a color original, comprising:
- a color-light limiting means arranged in an optical path of light emitted from a light source;
- an exposure control means for inserting color-light control filters into the optical path in accordance with measurement data of color light which has been transmitted through or has been reflected by the color-light limiting means and has been transmitted through or has been reflected by the color original, whereby the light is irradiated through a lens onto a copying color-sensitive material to control the exposure of each of three primary-color-sensitive layers in the copying color sensitive material;
- and
- an optical member coated with a dielectric multilayer film for cutting off rays in a particular wavelength band of a visible range and arranged in the vicinity of the lens.
Dependencies are inferred from the claim text.