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:
Jun. 10, 1986
Filed:
Oct. 11, 1984
Sanjiv Arora, Sunnyvale, CA (US);
Ricoh Company, Ltd., Tokyo, JP;
Ricoh Systems, Inc., San Jose, CA (US);
Abstract
Laser scan/electrophotographic non-impact printer is disclosed which comprises one or more laser diodes mounted on a rotating turntable, the angular scan of the laser diode being generated by rotation of the turntable. An optical system is provided for each beam emitted from the laser diode to shape and direct the beam toward the photosensitive surface. The information is carried on the beam by modulating the beam with the information output of the computer at the source of the beam. To increase the efficiency of the output of the device, the front and rear surfaces of the laser diodes may both be used. To overcome the difficulty of providing the necessary power to drive the laser diodes to the rotating turntable, a power source comprising a solar cell array illuminated by a lamp is provided. Preferably, this solar cell array is mounted on a surface above the surface of the laser diodes, so that it is easily carried by the rotating turntable. A rotating battery or power generator could also be used. To provide the information modulation to the laser diode outputs, preferably a photodiode or similar light sensitive device is mounted above the rotating turntable, with the control signal being provided by an LED through a fiber optic element or the like. Thus, the photo detector can be mounted to rotate with the laser diodes, while the LED or other source of light control signals is stationary relative to the rotating turntable.