The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 1980
Filed:
Jul. 06, 1978
Koichi Masegi, Yokohama, JP;
Takashi Kitamura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This specification discloses a recording apparatus which is capable of representing half-tones of an image. The apparatus is provided with a device for varying the spot size of a recording beam on a recording medium in accordance with the density information of the image to be recorded in order that the half-tones of the image may be represented by the use of a screen dot system. This device causes aberration to the optical system used therein, to thereby vary the size of the beam spot impinging on the recording medium and if required adjust the quantity of light of the beam to create spots of different diameters. Thus, without relatively increasing the power of the beam, it is possible to provide beam spots of various diameters to thereby enable representation of a half-toned image.