JPH01107908U

JPH01107908U -

Info

Publication number: JPH01107908U
Application number: JP211088U
Authority: JP
Priority date: 1988-01-12
Filing date: 1988-01-12
Publication date: 1989-07-20

Description

[Brief explanation of the drawing]

第１図は本考案の概念図、第２図ａ，ｂ、第３
図ａ，ｂは色測定手段の実施態様の説明図、第４
図は色情報一網点面積率変換テーブルの説明図で
ある。１…色見本、２１…光源、２２…光電交換素子
（フオトダイオード）、２２Ｒ…Ｒフイルタ付フ
オトダイオード、２２Ｇ…Ｇフイルタ付フオトダ
イオード、２２Ｂ…Ｂフイルタ付フオトダイオー
ド。 Figure 1 is a conceptual diagram of the present invention, Figures 2 a, b, and 3.
Figures a and b are explanatory diagrams of embodiments of the color measuring means;
The figure is an explanatory diagram of a color information-dot area ratio conversion table. 1...Color sample, 21...Light source, 22...Photoelectric exchange element (photodiode), 22R...Photodiode with R filter, 22G...Photodiode with G filter, 22B...Photodiode with B filter.

Claims

[Scope of claims for utility model registration] (1) Obtaining color information by optically measuring a color sample, and obtaining this color information and color information created and stored in advance.
A device for determining the halftone dot area ratio of each color separation plate capable of reproducing colors specified in a color sample by printing based on a halftone dot area ratio conversion table, which emits white light and A halftone dot area characterized in that a light source for illuminating the white illumination light is provided, and a photoelectric conversion element that separately receives red, green, and blue light is provided at a position where it can receive the reflected light of the white illumination light from the color sample. Rate determining device. (2) The dot area according to claim 1, in which the photoelectric conversion element comprises a photodiode with a red filter attached, a photodiode with a green filter attached, and a photodiode with a blue filter attached. Rate determining device.