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:
Jan. 04, 1994
Filed:
Jan. 30, 1992
Gajendra D Savant, Torrance, CA (US);
Christopher C Rich, San Pedro, CA (US);
David G Pelka, Los Angeles, CA (US);
Physical Optics Corporation, Torrance, CA (US);
Abstract
A diamondlike carbon thin film protected hologram comprises an organic film deposited on a substrate and recorded to form a hologram, and a diamondlike carbon thin film deposited on the hologram, or first and second substrates having a diamondlike carbon thin film deposited thereon and an organic film having a holographic pattern recorded therein and sandwiched between the diamondlike carbon thin films of the first and second substrates. A method of fabricating a diamondlike carbon thin film protected hologram comprises forming a layer of dichromated gelatin on a substrate, recording the dichromated gelatin to form a hologram, and depositing on the hologram a diamondlike carbon thin film at room temperature, or depositing a diamondlike carbon thin film on first and second substrates, forming a layer of dichromated gelatin on the thin film of one of the substrates, recording the layer to form a hologram, and adhering the thin film of the second substrate to the hologram. The diamondlike carbon thin film protected hologram of the present invention is impervious to moisture and humidity and other environmental conditions which would otherwise negatively affect the performance of the hologram.