Retroreflective prism structure with windows formed thereon

Details Retroreflective prism structure with windows formed thereon Retroreflective prism structure with windows formed thereon

1994-09-28

1996-10-15

Loney, Donald

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

264 22, 264 25, 264166, 264167, 264219, 264284, B29D 1100, B28B 1118

Patent

active

055651518

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: 3873184 (1975-03-01), Heenan
patent: 4576850 (1986-03-01), Martens
patent: 4588258 (1986-05-01), Hoopman
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).

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