Printing by active tiling

Details Printing by active tiling Printing by active tiling

2006-03-07

2006-03-07

Kim, Peter B. (Department: 2851)

Photocopying

Projection printing and copying cameras

Illumination systems or details

C355S065000

Reexamination Certificate

active

07009688

ABSTRACT:
A photosensitive area11, such as a photolithographic sheet, in an images plane is notionally subdivided in both dimensions to form contiguous (tiled) sub-areas. Variable illumination means1,4provides a selected pixellated light pattern, which is directed8, 9, 10to fill a selected one of the sub-areas so that pixels of said pattern are, at least 15 microns across at the sub-area, and control means are responsive to an input signal representative of an image conjointly to control the production and direction of the pixellated patterns so that an entire image is produced over all of the said sub-areas. As shown, the variable illumination means comprises a light source2with digital micro-mirror array deflector device4, and the sub-area is selected by lens array8with a shutter10and polariser array11. The latter may be replaced by a two-axis steering mirror and lens array. An analogue micro-mirror array, optionally with, a kaleidoscope, may be used in the illumination means, with (a) collimating optics and lens array; or (b) a focussing macro-lens, for sub-area selection.

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International Search Report for PCT/GB01/05438.

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