Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1996-08-28
1998-11-24
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428141, 428167, 428212, 359529, 359530, 425542, 425588, 264167, B32B 300, G02B 5122
Patent
active
058404066
ABSTRACT:
Retroreflective prisms are formed with windows thereon by removing a portion of the prism mold on one prism pair leaving the apex of the prism intact. In this manner smaller prisms are formed adjacent larger prisms. Optionally, the optical axis of the prisms may be tilted with respect to one another, preferably in a negative direction. The smaller prisms with windows provide increased brightness and optimize the retroreflection light.
REFERENCES:
patent: 2380447 (1945-07-01), Jungersen
patent: 3689346 (1972-09-01), Rowland
patent: 3712706 (1973-01-01), Stamm
patent: 3873184 (1975-03-01), Heenan
patent: 4244683 (1981-01-01), Rowland
patent: 4588258 (1986-05-01), Hoopman
patent: 5122902 (1992-06-01), Benson
patent: 5171624 (1992-12-01), Walter
Rityn, N.E., "Optics of Corner Cube Reflectors", Sov. J. Opt. Tech., 34:198-201 (1967).
Eckhardt, H.D., "Simple Model of Corner Reflector Phenomena", Applied Optics, 10(7):1559-1566 (1971).
Loney Donald
Reflexite Corporation
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