Cube-corner retroreflective articles having tailored divergence

Details Cube-corner retroreflective articles having tailored divergence Cube-corner retroreflective articles having tailored divergence

1986-11-21

1988-10-04

Corbin, John K.

350102, 350109, G02B 5124, G02B 5122, G02B 5136

Patent

active

047752190

ABSTRACT:
Cube-corner retroreflective article having improved divergence profiles. The three lateral reflecting faces of the cube-corner retroreflective elements are formed by three intersecting sets of parallel V-shaped grooves, and at least one of the sets includes, in a repeating pattern, at least two groove side angles that differ from one another. Thereby the array of cube-corner retroreflective elements is divided into repeating sub-arrays that each comprise a plurality of cube-corner retroreflective elements in a plurality of distinctive shapes that retroreflect incident light in distinctively shaped light patterns.

REFERENCES:
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patent: 3833285 (1974-09-01), Heenan
patent: 4206969 (1980-06-01), Cobb
patent: 4243618 (1981-06-01), Van Arnan
patent: 4576850 (1986-03-01), Martens
patent: 4582885 (1986-04-01), Barber
patent: 4588258 (1986-05-01), Hoopman
"Study of Light Deviation Errors in Triple Mirrors and Tetrahedral Prisms," P. R. Yoder, Journal of the Optical Society of America, vol. 48, No. 7, Jul., 1958.
"Optics of Corner Cube Reflectors," N. E. Rityn, Theory and Experiment, Page 198 et seq., (UDC 538.318:531.719.24).
"Simple Model of Corner Reflector Phenomena", H. D. Eckhardt, Applied Optics, vol. 10, No. 7, Jul., 1971.
CSC/TM-77/6054, Description of the Cube Corner Retroreflector Modeling Programs (Solid and Hollow) for Calculating Far-Field Diffraction Patterns, J. G. Kirk, Feb. 1977, prepared for National Aeronautics and Space Administration, Goddard Space Flight Center, Contract NAS 5-11999, Task Assignment 842.

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