1
Mark E McDonald: High throughput contrast enhancement for polarized displays. Hughes Aircraft Company, Leonard A Alkov, Wanda K Denson Low, November 19, 1991: US05066108 (131 worldwide citation)

A display having a linearly polarized image source, a quarter-wave retarder for transforming the linearly polarized illumination to circularly polarized illumination, imaging elements responsive to the circularly polarized illumination for producing viewable circularly polarized imaging illumination ...


2
Mark E McDonald, Andrew Daiber, William B Chapman, Nadim Maluf: Tunable external cavity laser. Intel Corporation, Blakely Sokoloff Taylor & Zafman, February 8, 2005: US06853654 (49 worldwide citation)

Apparatus and methods that utilize tunable elements to provide for selective wavelength tuning of a light beam. The apparatus comprises a first tunable wavelength selection element having a first adjustable free spectral range, a second tunable wavelength selection element having a second adjustable ...


3
James R Amble, Lambrerrtus Hesselink, Tokyuki Honda, Mark E McDonald, Michael V Morelli, Andrew J Daiber, Herman A Ferrier, Sanjoy Ghose, Thomas A Kridl, Matthew Lipson, Shunichi Nishimura, Sergei Sochava, LeRoy A Volz: Optical data storage system with multiple layer media. Siros Technologies, Sierra Patent Group, June 3, 2003: US06574174 (44 worldwide citation)

An optical information storage system using optical storage media including multiple data layers or stacks wherein each of the multiple data stacks has a storage density comparable to a conventional single layer optical disk. The optical data storage system comprises an optical medium having a singl ...


4
Robert R McLeod, Sergei L Sochava, Andrew J Daiber, Mark E McDonald, Lambertus Hesselink, Ingolf Sander, Timothy M Slagle: Multilayer reflection microhologram storage in tape media. Siros Technologies, Lumen Intellectual Property Services, February 1, 2000: US06020985 (27 worldwide citation)

Digital data bits are stored as discrete-level reflection microholograms in a multi-depth digital optical data storage system. Reference and signal beams are incident in a counterpropagating geometry on opposite faces of a tape. The reflection microholograms are stored at the coinciding focus of the ...


5
Mark E McDonald, Ronald T Smith: Polarized holographic heads up display. Hughes Aircraft Company, Leonard A Alkov, Wanda K Denson Low, November 27, 1990: US04973132 (27 worldwide citation)

A head-up vehicle instrument display system that includes an imaging illumination source located in a recess in the vehicle dashboard or on the dashboard, and a combiner/retarder element embedded in a vehicle windshield. The combiner/retarder element includes a reflection hologram and one or more ha ...


6
Mark E McDonald, Robert R McLeod, Andrew J Daiber: Tracking error signal generation using confocally filtered detection. Siros Technologies, Sierra Patent Group, May 13, 2003: US06563779 (24 worldwide citation)

A tracking error signal generation apparatus and method which utilizes confocal detection with a split detector and a differencing circuit for generation of tracking error signals. A first lens is positioned in the path of a light beam returning from an optical medium. A pinhole is positioned in the ...


7
Mark E McDonald: Polarized heads up display. Hughes Aircraft Company, L A Alkov, W K Denson Low, May 18, 1993: US05212471 (21 worldwide citation)

A head-up display for vehicle including a windshield having first and second opposing air interfaces for partially reflecting imaging illumination at a predetermined air interface to produce a primary virtual image viewable by the operator of the vehicle, and a half-wave retarder interposed between ...


8
Mark E McDonald: Anti-reflective (AR) coating for high index gain media. Intel Corporation, Kevin A Reif, January 30, 2007: US07170915 (21 worldwide citation)

Anti-reflective coatings may be used on laser high index gain media to mitigate reflection. An absentee layer may be used to compliment the antireflective coating to improve its antireflective performance over a broader range of wavelengths. The absentee layer comprises a material having a higher in ...


9
Robert R McLeod, Mark E McDonald: Focus error signal generation using confocally filtered detection. Siros Technologies, Sierra Patent Group, August 29, 2000: US06111828 (16 worldwide citation)

A focus error signal generator device including first and second optical lenses disposed in the respective paths of first and second light beams derived from the return read beam wherein the first and second optical lens have corresponding points of focus, and first and second detectors disposed in ...


10
Andrew J Daiber, Mark E McDonald: Positive unit magnification reflective optics for holographic storage. Siros Technologies, Lumen Intellectual Property Services, November 14, 2000: US06147782 (16 worldwide citation)

A positive unit magnification reflective head is used to back-reflect a primary light beam, for storing reflection microholograms at the coincident foci of the primary and reflected beams. Imaging the primary beam focus onto itself at positive unit magnification allows increasing system tolerance to ...