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:
Jun. 02, 2009
Filed:
Apr. 15, 2005
Hiroaki Misawa, Tokushima, JP;
Saulius Juodkazis, Tokushima, JP;
Shigeki Matsuo, Tokushima, JP;
Toshiaki Kondo, Tokushima, JP;
Hiroaki Misawa, Tokushima, JP;
Saulius Juodkazis, Tokushima, JP;
Shigeki Matsuo, Tokushima, JP;
Toshiaki Kondo, Tokushima, JP;
Japan Science and Technology Agency, Saitama, JP;
Abstract
A method of 3D holographic recording by using a very simple optical system includes dividing a femto-second laser pulse into a plurality of light beams by a diffraction beam splitter, focusing four light beams selected from the divided plurality of light beams, controlling each optical phase of the selected four light beams by a phase retarder, and further focusing these four light beams into a sample comprised of a photosensitive material capable of multi-photon exposure so that the photosensitive material is exposed to the interference among the four light beams and multi-photon absorption in the sample is induced, thus recording a 3D phase hologram on the irradiated portion of the sample.