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http://dx.doi.org/10.3807/KJOP.2005.16.1.056

Backward Testing Method of MTF measurement for optical engine of CRT of rear projection HDTV  

Song, Jong-Sup (Optical Module R&D Group, Optics Division, Samsung Electro-mechanics Co. Ltd.)
Jo, Jae-Heung (Dept. of Physics, Hannam University)
Hong, Sung-Mok (Dept. of Physics, Hannam University)
Lee, Yun-Woo (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science)
Song, Jae-Bong (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science)
Lee, Hoe-Yun (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science)
Lee, In-Won (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.1, 2005 , pp. 56-62 More about this Journal
Abstract
Because of the wide plane and the curved field of CRT rear projection high definition television, its MTF(modulation transfer function) can't be easily measured by the usual forward testing method. Then we propose a backward testing method for the MTF so that the object plane and the image analyzer of forward testing are located at positions opposite each other. We prefer to use the backward testing method because the forward testing method has poor accuracy caused by very small numerical aperture, low spatial resolutions, and long depth of focus. We found that the backward testing method was very easy to align and had high repeatability. We confirmed the confidence of results obtained by the backward testing method in comparison with designed results.
Keywords
MTF measurement; HDTV; optical engine;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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