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:
Nov. 16, 2010
Filed:
Nov. 29, 2007
Masaaki Hara, Tokyo, JP;
Mikio Sugiki, Kanagawa, JP;
Kazutatsu Tokuyama, Tokyo, JP;
Mitsuru Toishi, Kanagawa, JP;
Kenji Tanaka, Tokyo, JP;
Kazuyuki Hirooka, Gunma, JP;
Masaaki Hara, Tokyo, JP;
Mikio Sugiki, Kanagawa, JP;
Kazutatsu Tokuyama, Tokyo, JP;
Mitsuru Toishi, Kanagawa, JP;
Kenji Tanaka, Tokyo, JP;
Kazuyuki Hirooka, Gunma, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a reproducing apparatus adapted to reproduce data recorded on a holographic recording medium, a reference light generator generates reference light for illuminating the holographic recording medium, and a coherent light generator generates coherent light having an intensity greater than the absolute value of a minimum amplitude of a reproduced image and having a phase equal to the phase of the reproduced image. An image signal acquisition unit senses the reproduced image produced by illuminating the holographic recording medium with the reference light and the coherent light, and acquires an image signal based on the reproduced image. A square root calculation unit calculates the square root of each of values constituting the image signal. A removal unit removes the component of the coherent light from the calculated square root, whereby the data recorded on the holographic recording medium is correctly reproduced.