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:
May. 29, 1984
Filed:
Dec. 30, 1981
Peter Nicholson, Flushing, NY (US);
Kalina Nicholson, Flushing, NY (US);
Other;
Abstract
A method for recording and reconstructing a hologram recorded with two pulse laser beams having different wavelengths in order to increase the illuminance of the reconstructed image recorded in one of said channels is disclosed. The method comprises the steps of generating a first reconstruction beam at a wavelength shifted from the wavelength of the recording beam having the lesser illuminance if the two recording beams had equal irradiance toward a direction of the other recording beam. The wavelength of the second reconstruction beam has a value shifted from its associated recording beam by an amount equal the value that said first reconstruction beam is shifted from its associated recording beam. The resultant reconstructed images from the two reconstruction beams are generally equal in size and are in co-registration. The amount of shift is chosen so that the reconstruction wavelengths have substantially equal illuminance for an equal amount of irradiation. The product obtained by the recording method is also disclosed.