General Electric Assigned Two Patents

Processing
information from optical disk layers

General Electric, Niskayuna, NY, has been assigned a patent (8,520,483) developed
by five co-inventors for a "method
and system for processing information from optical disk layers."
 
The co-inventors are Xiaohong Li, Clifton Park, NY, Xuefeng Wang, Niskayuna,
NY, Zhiyuan Ren, Malta, NY, John Erik Hershey, Ballston Lake, NY, and John
Anderson Fergus Ross, Niskayuna, NY.

The abstract of the patent published by the U.S. Patent and Trademark Office
states: "A method for processing
information is provided. The method includes directing a laser beam to a first
track of a first layer of a holographic storage medium. The method also
includes recording a base voltage based on a look-up table. The method includes
directing the laser beam to a target track in the first layer, based on
position information in tracks. Further, the method includes recording an
offset voltage for the target track into the look-up table. Still further, the
method includes directing the laser beam to a target layer based on position
information in vertical wobbles. The method also includes recording an offset
voltage for the target layer into the look-up table. Finally, the method
includes determining a final voltage based on the look-up table and applying
the final voltage to an actuator for moving the laser beam to a final target
position in the holographic storage medium for recording and retrieval of
information."

The patent application was filed on July 29, 2010 (12/846,085).

Recording data in an optical storage medium
and an optical storage medium
General Electric, Niskayuna, NY, has been assigned a patent (8,475,975) developed
by ten co-inventors for a "method of
recording data in an optical storage medium and an optical storage medium."

The co-inventors are Arunkumar Natarajan, Niskayuna, NY, Eugene Pauling Boden,
Scotia, NY, Dmitry Vladimirovich Dylov, Schenectady, NY, James Edward Pickett,
Schenectady, NY, Evgenia Mikhailovna Kim, Ballston Lake, NY, Patrick Joseph
McCloskey, Watervliet, NY, Kwok Pong Chan, Troy, NY, Victor Petrovich
Ostroverkhov, Ballston Lake, NY, Matthew Jeremiah Misner, Delanson, NY, and
Vijay Krishna Paruchuru, Edison, NJ.

The abstract of the patent published by the U.S. Patent and Trademark Office
states: "In accordance with one
aspect of the present invention, a method for recording holographic data in an
optical storage medium is provided. The method includes (i) providing an
optical storage medium including: (a) a thermoplastic polymer matrix, (b) a
latent acid generator, (c) a non-linear sensitizer, and (d) a reactant
including a latent chromophore. The method further includes (ii) irradiating a
volume element of the optical storage medium with an interference pattern, said
interference pattern including an incident radiation having a wavelength and an
intensity sufficient to cause upper triplet energy transfer from the non-linear
sensitizer to the latent acid generator, thereby generating an acid, wherein
the latent acid generator is substantially non-responsive to said incident
radiation. The method furthermore includes (iii) reacting at least one
protected chromophore with the acid generated to form at least one chromophore,
thereby causing a refractive index change within the volume element; and (iv)
producing within the irradiated volume element refractive index variations
corresponding to the interference pattern, thereby producing an optically
readable datum. An optical storage medium is also provided."

The patent application was filed on June 21, 2011 (13/164,996).