Title:
【発明の名称】印刷機の版面上の水膜検出器
Document Type and Number:
Japanese Patent JP2691056
Kind Code:
B2
Abstract:
An on-plate water film sensor for printing machines, comprising a narrow-band light source (1), a photo modulator (2) for chopping a light beam therefrom into a p- and an s-polarized beams, a collimator (3) for making parallel the rays of said collimated beams with a given cross-sectional area for measurement, a wavelength plate (4) for adjusting the wavefront of the parallel rays, a means (7, 8) for receiving the light specularly reflected from a plate (6), and an arithmetic unit (9) to figure out the thickness of a water film formed on the plate based on the intensities of the received beams. Water lining which usually has patterns of narrow width can be detected, and the measurement of a water film thickness can be done with higher speed.
Inventors:
Makoto Shimoyama
Ikuo Ozaki
Ikuo Ozaki
Application Number:
JP18721490A
Publication Date:
December 17, 1997
Filing Date:
July 17, 1990
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
B41F33/10; B41F7/24; G01B11/06; (IPC1-7): G01B11/06; B41F7/24; B41F33/10
Domestic Patent References:
| JP60249007A | ||||
| JP60242308A | ||||
| JP1270603A | ||||
| JP2140604A | ||||
| JP62293104A |
Attorney, Agent or Firm:
Shigefumi Okamoto (1 person outside)