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. 03, 1998
Filed:
Jun. 29, 1994
Mool C Gupta, Webster, NY (US);
Alan C Nutt, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A ferroelectric light frequency doubler device has a surface coating on one surface of an initially uniformly poled ferroelectric crystal, the surface coating on the one surface being exposed to a scanning electron beam so as to form a spatially periodically alternating polarity domain structure in the crystal. The surface coating can be of an inorganic material or it can be of a polymeric organic material. The surface coating can be adapted to be patterned to form an optical grating in registrative alignment with the spatially periodically alternating polarity domain structure when such optical grating is desired. Alternatively, the surface coating may remain on the device as a protective coating, or it may be removed upon formation of the alternating polarity domain structure in the crystal. When the surface coating is adapted to be responsive to the scanning electron beam, the spatially periodically alternating domains in the ferroelectric crystal and a latent optical grating pattern in the surface coating are established at the same time by the electron beam. The latent optical grating pattern can be formed into an optical grating during a subsequent pattern development step.