Double-resolution optical system for electrophotographic printer

Details Double-resolution optical system for electrophotographic printer Double-resolution optical system for electrophotographic printer

1995-10-12

1998-11-10

Yockey, David F.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347238, 347239, 347134, B41J 247, B41J 245

Patent

active

058351205

ABSTRACT:
Light emitted from an array of light-emitting elements in an electrophotographic printer is transmitted through a birefringent plate that deflects light polarized in a first plane but does not deflect light polarized in a second plane perpendicular to the first plane, and through a polarization switching device that is controlled by an electrical signal so as to selectably transmit light polarized in either the first plane or the second plane. The transmitted light illuminates a photosensitive medium. Each light-emitting element can illuminate two dots on the photosensitive medium, depending on the state of the polarization switching device, thereby doubling the dot resolution.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4614954 (1986-09-01), Ohta et al.
patent: 4634226 (1987-01-01), Isogai et al.
patent: 4721977 (1988-01-01), Fukae
patent: 4743800 (1988-05-01), Mimura et al.
patent: 5251057 (1993-10-01), Guerin et al.
patent: 5515097 (1996-05-01), Munechika et al.
"LED Array Development and Printer Development" Torikeppusu WS 6 (Oct. 1985), pp. 114-140.

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