International Business Machines Corporation

Robert Keith Grygier

Hans J Coufal

Carl Michael Jefferson

Kenneth Francis Walsh

Maria-Pilar Bernal

Egbert Oesterschoze

Hans J&uuml;rgen Coufal

Optical information processor and storage of pixelated data pattern in a Fourier plane of a lens as achieved by a plurality of optical elements operating with a spatial light modulator. A laser light source illuminates a data pattern with a wavefront that is created by a phase mask to effect a phase shift. The optical information can be effecitvely processed or stored, for instance, in a holographic data storage system. The holographic data storage system for storing a data array contains illuminated and dark regions including a multi-fold phase shift mask. This affects a linear and non-random shift of an image. The image is stored on a holographic storage medium. There is a spatial light modulator between the input location for the optical data and the storage medium. The phase shift is effected in the Fourier plane.

Phase shifting element for optical information processing storing systems

A device for reading data from a multi-layered optical disk includes a short coherence-length light source, a beam splitter, an adjustable mirror and an optical detector. The beam splitter is used to form first and second light beams from the short coherence-length light beam. The first light beam is then directed to the optical disk and is reflected by a data mark stored on the optical disk. The second light beam is directed along a reference beam path. The mirror is disposed along the reference beam path and reflects the second light beam back to the beam splitter. The beam splitter recombines the reflected first light beam and the second light beam after the second light beam traverses the reference beam path. The optical detector detects the data mark by constructive interference of the combined reflected first light beam and the second light beam. The position of the mirror is adjustable so that the optical path length of the reference beam path is made equal to the optical path length of the first light beam to each layer of the multi-layered optical disk. A device for recording data onto a multi-layered optical disk uses similar components and techniques for recording data.

Short coherent-length optical tomograph for high density volume optical

The invention relates to a reflective phase-shifting lithographic mask having a reflective surface comprising a plurality of areas having different refractive indices.

Reflective lithographic mask

A lithographic system for patterned exposure of radiation-sensitive resist comprises a radiation source, a mask, a converging optical element having a focal plane, and a phase-shifting optical element disposed at the focal plane of the converging optical element. The lithographic system produces enhanced images.

Focal plane phase-shifting lithography

A lithographic system for patterned exposure of radiation-sensitive resist. The system comprises a radiation source, a mask, a converging optical element having a focal plane, and a phase-shifting optical element disposed at the focal plane of the converging optical element. The lithographic system produces enhanced images.

The present invention relates to an improved high speed rotary bone cutter comprising a drive shaft and a cutting head. The drive shaft has an elongated housing rotably mounted on the shaft. The housing has an enclosed fluid passageway around the shaft for the flow of cutting fluid. The passageway insulates the flowing fluid from the high rotational speed of the drive shaft.

Surgical cutting instrument

A process for depositing electrical charges on a dielectric surface by means of a high velocity jet of fluid which strikes the surface, flows over it and triboelectrically charges it, and then separates from the surface.

Growing community of inventors

San Jose, CA, United States of America

Robert Keith Grygier