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Proceedings Paper

Artifact-free resizing using an optical method
Author(s): John W. Bowron; George Tsintzouras
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Paper Abstract

Pixelated spatial light modulators (SLMs) are commonly used in projection displays. The total number of columns and rows in the device define its `native' resolution. This native resolution may not match the resolution of the signal that is to be displayed. It is common to use electronic methods to re-scale the signal to match the resolution of the panel. This resizing introduces artifacts that may be unacceptable in some applications. A new technique is described using optical methods to obtain an artifact free representation of the signal. This method works particularly well with high- resolution 1.8' diagonal devices where the signals to be displayed have equal or lesser resolution than the SLM. The system requires a zoom illumination system and a zoom projection lens. Information is sent to a sub-area of the panel that matches the native resolution of the signal. The zoom illumination system concentrates the total light flux onto this sub-area. A zoom projection lens adjusts the size of the final image to be constant.

Paper Details

Date Published: 25 April 2000
PDF: 7 pages
Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); doi: 10.1117/12.383382
Show Author Affiliations
John W. Bowron, Christie Digital Systems Inc. (Canada)
George Tsintzouras, Christie Digital Systems Inc. (Canada)

Published in SPIE Proceedings Vol. 3954:
Projection Displays 2000: Sixth in a Series
Ming Hsien Wu, Editor(s)

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