VCSEL-Based Variable Image Optical Line Generator

摘要

A single-pass imaging system utilizes a two-dimensional (2D) light field generator (e.g., one or more VCSEL devices) to generate a modulated two-dimensional modulated light field in accordance with image data for a single row of pixels, and an anamorphic optical system that concentrates the two-dimensional modulated light field in a process direction such that a one-dimensional scan line image extending in a cross-process direction is generated on an imaging surface. The VCSEL array is configured using a scan line image data group made up of pixel image data portions, with associated groups of light emitting elements aligned in the process direction being configured by each pixel image data portion. Gray scaling is achieved either by turning on some of the light emitting elements of the associated group, or by turning the light emitting elements of the associated group partially on, e.g. using a common drive current.

主权项

1. A single-pass imaging system comprising:
a two-dimensional light field generator including:
a plurality of light emitting elements disposed in a two-dimensional array, each light emitting element being adjustable between two or more modulated states such that, when said each light emitting element is in a first modulated state said each light emitting element transmits an associated modulated light portion having a first intensity, and when said each light emitting element is in a second modulated state said each light emitting element transmits said associated light portion having a second intensity, said second intensity being lower than said first intensity, and wherein each light emitting element is arranged to direct said associated light portion in a corresponding predetermined direction, whereby said plurality of light emitting elements generate a modulated two-dimensional light field, anda controller configured to control the plurality of light emitting elements in accordance with received image data; and an anamorphic optical system positioned to receive said modulated two-dimensional light field from said two-dimensional light field generator, and arranged to concentrate said associated light portions transmitted from said each light emitting element such that the concentrated modulated light portions produce an elongated scan line image, wherein the plurality of light emitting elements are arranged in a plurality of rows and a plurality of columns, wherein all of said light emitting elements in each said column forms an associated pixel group, and wherein the anamorphic optical system is arranged to concentrate modulated light portions received from each associated pixel group of said plurality of light emitting elements onto an associated said scan line portion of said elongated scan line image.