Back to results
US 5,471,348 AGranted
Directed reflection optical device
AssigneeMinnesota Mining and Manufacturing Company
InventorsRichard A. Miller, Kenneth A. Aho, John F. Dreyer, Jr.
Life of this patent
Estimating the term…
Abstract
An optical device having a transparent body and including two prism surfaces formed thereon. The composite structure exhibits two axis stability in that the angular relationship between the input beam and the output beam remains fixed for slight movement of the device about two orthogonal axes.
Claims12
A reflective article comprising first and second structured surfaces, wherein:
- said first structured surface includes a first array of prisms aligned in a first orientation;
- said second structured surface includes a second array of prisms aligned in a second orientation, wherein the second orientation is different from said first orientation;
- such that a light ray incident on said first structured surface at an entrance angle is reflected at said second structured surface and exits from said first structured surface at an exit angle, the exit angle measured relative to said entrance angle.
Dependencies are inferred from the claim text.