Artifact-free resizing using an optical method

John W. Bowron; George Tsintzouras

doi:10.1117/12.383382

25 April 2000 Artifact-free resizing using an optical method

John W. Bowron, George Tsintzouras

Proceedings Volume 3954, Projection Displays 2000: Sixth in a Series; (2000) https://doi.org/10.1117/12.383382
Event: Electronic Imaging, 2000, San Jose, CA, United States

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.

Citation Download Citation

John W. Bowron and George Tsintzouras "Artifact-free resizing using an optical method", Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); https://doi.org/10.1117/12.383382

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