I-Fu Shih
Raytheon
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Publication
Featured researches published by I-Fu Shih.
Applied Optics | 1991
I-Fu Shih; David B. Chang
Hughes Aircraft Company has developed a miniature forward-looking infrared test target that uses differential emissivity to simulate differential temperature. This paper provides a theoretical analysis for the emissivity target. The analysis leads to a semiempirical formula that gives a reasonably good prediction of apparent temperature differences. The formula is useful for designing future emissivity targets.
1985 International Lens Design Conference | 1986
I-Fu Shih; Lee Mickelson; David B. Chang
Design, fabrication, and test results are discussed for a compact two-mirror collimator that was diamond turned from a single piece of material.
Applied Optics | 1985
I-Fu Shih; David B. Chang; Peter L. Garrett; Norton L. Moise
An analysis is made of the degree to which a simple contorted mirror can reduce distortion in a projected image. Although it is impossible in general to remove the distortion completely by this means, significant reduction may be achieved. Equations are derived for the shape of a mirror which will give the maximum reduction possible. Equations are also developed for how to stress a planar mirror to create the desired optimal shape. Image blurring is estimated. An example is presented in which this technique is used to reduce the distortion which results when a projection lens appropriate for projection onto a flat screen is used instead to project onto a spherical surface from an oblique angle.
Archive | 1992
Victor Vali; David B. Chang; I-Fu Shih
Archive | 1990
David B. Chang; Norton L. Moise; I-Fu Shih
Archive | 1992
Victor Vali; David B. Chang; I-Fu Shih; Bruce Youmans
Archive | 1991
David B. Chang; Slava A. Pollack; I-Fu Shih; Albert J. Jicha
Archive | 1990
David B. Chang; Norton L. Moise; I-Fu Shih
Archive | 1990
David B. Chang; I-Fu Shih; Michael E. Stickney
Archive | 1989
I-Fu Shih; David B. Chang; James A. Arns; Gaylord E. Moss; Ronald T. Smith