Patent ID: 7986602
Filing Date: 2011-07-26
Classification: G11B

Abstract:
1. A method to set a rotation rate for an optical holographic data storage medium comprising a center point, a holographic data storage layer, and an optical data storage layer, comprising the steps of: disposing said optical holographic data storage medium in an optical holographic data storage drive comprising a lasing device for emitting laser light comprising a wavelength, and an optical detector for detecting said laser light, wherein said laser light is not reflected by said holographic data storage layer; determining if said optical storage layer comprises an alternating series of lands and grooves; wherein if said optical storage layer comprises an alternating series of lands and grooves, determining if the distance between alternating grooves increases as a function of the distance from said center point; wherein if the distance between alternating grooves increases as a function of the distance from said center point, rotating said optical holographic data storage medium at a constant angular velocity.