The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 1979
Filed:
Apr. 11, 1977
Bradford Howland, Cambridge, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A process for making a new type of diffuser is described wherein an electric field is applied to a liquid containing a suspension of transparent platelets having a refractive index higher than that of the fluid and a different dielectric constant. The field causes the planes of the platelets to be aligned substantially parallel to that of the field but to have random angular orientation with respect to the direction of the field. While the platelets are thus aligned, the liquid is hardened to permanently retain the platelets in the aligned position even in the absence of the electric field. The resulting structure produces good diffusion of light with a high ratio of transmitted to reflected light.