JPH04225374A - Optical photographic system color laser printer - Google Patents

Abstract

PURPOSE:To realize a color printer which utilizes laser beams and ensures high resolution. CONSTITUTION:The printer is provided with laser light sources 1, 2 and 3 which emit laser beams in the three or more primary colors of different wavelengths, a color adding/mixing unit 7 which adds one laser beam to the other so that their colors are mixed and shutters 4, 5 and 6 which are opened/closed to select corresponding laser beams. A picture is formed on a color film by mixing the laser beams passing through the shutters 4, 5 and 6 with the color adding/mixing unit 7, so as to produce multicolor light, and scanning the multicolor light. Color printing can be attained by the laser printer, and printing which ensures quality higher than that by a conventionally known CRT color copying machine can be achieved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to printers, and more particularly to color laser printers that require color representation.

0002

2. Description of the Related Art Conventionally, printers using laser light sources have not had the technology to print in color. Therefore, since a CRT color hard copy device is an apparatus that can produce printing similar to that of the present invention, FIG. 2 shows the configuration of this copy apparatus. This copying device is a flat face monochrome CR
T13, a camera section consisting of an RGB color separation filter 14, a lens 16, a shutter 15, a color film 10;
It is composed of a GB interface 11, a signal processor 12, and a controller 17. The basic principle is monochrome CR
Color graphic display RG on T13
B-signal images are sequentially displayed as still images, passed through corresponding color separation filters, and subjected to multiple exposure on a color film.

0003

[Problems to be Solved by the Invention] In the case of existing CRT color copying devices, the resolution is not as good as that of the CRT, and since multiple exposure is performed for RGB individually, there is a limit to the overlay accuracy. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a laser printer capable of high-resolution, clear color printing in order to solve the above-mentioned problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object, an optical photographic color laser printer according to the present invention includes a plurality of laser light sources, a shutter, an additive color mixer, and a laser scanning unit. An optical photographic color laser printer having a plurality of laser light sources each outputting laser light of a different wavelength, and a shutter selectively opening and closing each laser light from the plurality of laser light sources. , the additive mixer creates polychromatic light by additively mixing the laser light that has passed through the shutter, and the laser scanning unit scans the polychromatic light,
It forms an image on color film.

Further, the laser light source is a laser light source having wavelengths of at least three primary colors of light: red, green, and blue.

Furthermore, when forming an image on a color film, horizontal scanning is performed by a laser scanning unit, and vertical scanning is performed by transporting the film.

[0008]

[Operation] Laser beams of three or more primary colors are mixed additively to create polychromatic light, and the polychromatic light is scanned to form an image on a photosensitive color film to perform color printing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the present invention. In the figure, the optical photographic color laser printer according to the present invention includes three laser light sources 1, 2, and 3 that output laser light having wavelengths of red, green, and blue, which are the three primary colors of light, and each laser light source. three shutters 4, 5, and 6 that control the output of laser beams from shutters 1, 2, and 3; an additive mixer 7 that additively mixes the laser beams that have passed through the shutters 4, 5, and 6; It has a laser scanning unit 8 that scans the polychromatic light produced by the mixer 7, and a controller 9 that drives and controls the shutters 4, 5, 6 and the laser scanning unit 8.

In the embodiment, the controller 9 controls the respective laser light sources 1 and 2 based on color information from the host device.
, 3 are driven. The laser beams that have passed through the shutter are mixed by an additive mixer 7 to produce polychromatic light. The polychromatic light produced by the additive mixer 7 is scanned by a laser scanning unit 8 to form an image on a color film 10. In the image forming method, horizontal scanning is performed by a laser scanning unit 8, and vertical scanning is realized by film feeding, similar to existing page printers. In the above explanation, the case of three primary color laser beams has been described as an example, so the color reproduction will be eight colors, but if you add laser beams with different wavelengths, it is possible to reproduce intermediate colors, In addition, by controlling the opening and closing time of the shutter,
Even by varying the amount of each laser beam, it is possible to express intermediate tones.

[0011]

[Effects of the Invention] As is clear from the above explanation, by using the optical system of the present invention, it is possible to print in color with a laser printer, and also to print with higher resolution and better quality than existing CRT color copying devices. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an existing CRT color copying device.

[Explanation of symbols]

1 Laser light source 2 Laser light source 3 Laser light source 4 Shutter 5 Shutter 6 Shutter 7　Additional color mixer 8 Laser scan unit 9 Controller 10 Color film

Claims (3)

[Claims] 1. An optical photographic color laser printer comprising a plurality of laser light sources, a shutter, an additive color mixer, and a laser scanning unit, the plurality of laser light sources each emitting laser light of a different wavelength. The shutter selectively opens and closes each laser beam from multiple laser light sources, and the additive mixer additively mixes the laser beams that have passed through the shutter to create polychromatic light. An optical photographic color laser printer, characterized in that the laser scanning unit scans polychromatic light and forms an image on a color film. 2. The optical photographic color method according to claim 1, wherein the laser light source is a laser light source having wavelengths of at least three primary colors of light, namely red, green, and blue.
laser printer. 3. When forming an image on a color film, horizontal scanning is performed by a laser scanning unit, and vertical scanning is performed by film feeding. Optical photographic color laser printer.