Image exposing apparatus using optical sensor to detect start sy

Details Image exposing apparatus using optical sensor to detect start sy Image exposing apparatus using optical sensor to detect start sy

1993-01-22

1998-05-19

Fuller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347235, 347243, B41J 2435, B41J 247, G01D 1514, H01J 2970

Patent

active

057542147

ABSTRACT:
In the improved image exposing apparatus, light beams of different wavelengths in narrow bands that issue from a plurality of light sources are admitted into a light deflector at different angles and substantially the same main scanning line defined on a light-sensitive material is scanned sequentially at predetermined time intervals by the reflected and deflected light beams. The apparatus is so designed that only one light beam will be admitted into a start synchronizing sensor when start synchronization is to be effected. Thus, even if the beam intensity of any one of the rasters produced in a multi-beam varied angle incidence optical system is not significantly higher than the sensitivity of the start synchronizing sensor which is to perform line synchronization for individual rasters, the intended line start synchronization can positively be effected when a write (exposure) mode is performed on a color light-sensitive material by each raster, whereby the light-sensitive material can be effectively exposed to produce a satisfactory image without defects such as color mismatch.

REFERENCES:
patent: 4404571 (1983-09-01), Kitamura
patent: 4962312 (1990-10-01), Matuura et al.
patent: 4978976 (1990-12-01), Okino
patent: 5091971 (1992-02-01), Ward et al.

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