JOHN M GUERRA
Engineering in West Concord, MA

6665245, Dec 16, 2003

Dec 22, 2000

09/746748

John M. Guerra - Concord MA
Dmitri Vezenov - Natick MA

Calimetrics - Alameda CA

G11B 700

369 4755, 369 5337

A method and apparatus for initializing an optical recording medium comprising a phase change material using a series of flashes of light. A series of low-power, high duty cycle flashes of light are produced to initialize the media to a crystalline form, onto which data may be recorded. In accordance with another aspect of this invention, a spiral flash bulb with centrally located connectors comprises the flash illumination source for initializing the optical recording media.

5442443, Aug 15, 1995

Apr 8, 1993

8/044396

John M. Guerra - Concord MA

Polaroid Corporation - Cambridge MA

G01N 2117

356376

A system operative with photon tunneling microscopy presents an image on a two-dimensional display which is perceived as a three-dimensional presentation by a person viewing the display. An optical image of the subject produced by the microscope is scanned by means of a television vidicon which converts the optical signal to an electric signal representing depth of a surface feature. The electric signal is outputted to the display wherein the image is presented as a set of line scans parallel to the horizontal axis of the display, and wherein the magnitude of the electric signal is plotted on the vertical axis of the display. A variable delay is introduced to be either increased or decreased stepwise between successive ones of the line scans. This results in a tilting of the presentation to the right or the left. Two tilted views are presented simultaneously, one to one eye and one to the other eye of an observer, to give a perception of a three-dimensional view.

5349443, Sep 20, 1994

Nov 25, 1992

7/981270

John M. Guerra - Concord MA

Polaroid Corporation - Cambridge MA

G01N 2117

356376

A flexible transducer for use in a photon tunneling microscope apparatus, the transducer comprising an optically transmissive body having a totally internally reflecting (TIR) surface therein and a second surface plano-parallel to the TIR surface when the TIR surface and the second surface are in an unstressed state, the second surface comprising a combination light energy entrance surface and light energy exit surface, the TIR surface being oriented such that light energy introduced at the second surface within the critical angle normally is reflected totally from the interior of the TIR surface to the second surface. A light pattern of variable intensity emerges from the second surface as a result of frustration of total internal reflection at the TIR surface occuring as the TIR surface is brought sufficiently proximate a sample surface. The flexible transducer and the TIR surface thereof are arranged and adapted to be brought into optical contact with, and to conform to, varied macrophotography configurations of the sample surface. The disclosure further relates to methods for making and using the flexible transducer.

2008028, Nov 20, 2008

Jun 10, 2008

12/136736

John M. Guerra - Concord MA, US

NANOPTEK CORPORATION - Maynard MA

B01J 19/08, H01L 31/0232, H01L 31/04

136259, 204660

Apparatus for generating electricity and for carrying out photo-induced reactions comprises: a primary reflector () or other optic which concentrates radiation to a primary focus; a secondary reflector at the primary focus to direct radiation to a secondary focus; a photovoltaic device () to convert radiation to electricity; and a photo-reactor () having a photoactive electrode, one of the photovoltaic device () and the photoactive electrode () lies at the primary focus, and the other at the secondary focus. Electric potential generated by the photovoltaic device () may be used to provide a bias or over-voltage between the photoactive electrode and a counter electrode. The apparatus may be used to photolyze water or to carry out other photochemical reactions.

6014166, Jan 11, 2000

Feb 27, 1995

8/395094

John M. Guerra - Concord MA

Polaroid Corporation - Cambridge MA

H04N 1300, H04N 718

348 79

A system operative with photon tunneling microscopy presents an image on a two-dimensional display which is perceived as a three-dimensional presentation by a person viewing the display. An optical image of the subject produced by the microscope is scanned by means of a television vidicon which converts the optical signal to an electric signal representing depth of a surface feature. The electric signal is outputted to the display wherein the image is presented as a set of line scans parallel to the horizontal axis of the display, and wherein the magnitude of the electric signal is plotted on the vertical axis of the display. A variable delay is introduced to be either increased or decreased stepwise between successive ones of the line scans. This results in a tilting of the presentation to the right or the left. Two tilted views are presented simultaneously, one to one eye and one to the other eye of an observer, to give a perception of a three-dimensional view.

5910940, Jun 8, 1999

Nov 18, 1997

8/972778

John M. Guerra - Concord MA

Polaroid Corporation - Cambridge MA

G11B 900

3692751

A medium suitable for the optical storage and retrieval of information comprising a substrate, an active layer for retention of the data, and an overlying optical layer, or layers for double-sided. The optical layer serves to produce an evanescent field in or adjacent to the active layer in response to an incident beam of radiation. The evanescent field is frustrated or attenuated by the data in the active layer and produces a signal.

2002015, Oct 24, 2002

Apr 25, 2001

09/842098

Dmitri Vezenov - Natick MA, US
John Guerra - Concord MA, US
Leonard Wan - Chestnut Hill MA, US
Paul Sullivan - Westwood MA, US
Kenric Nelson - Montclair NJ, US

G11B007/135

369/112260

An optical data storage medium includes a superstructure of micro-lenses defining first and second repeating periods. One of the periods is longer than the other, and the presence of the longer repeating period allows the medium to be used in an optical drive that is configured to use light diffracted by the longer period for tracking purposes. The micro-lenses may be configured such that adjacent lenses have different heights, widths, or shapes. In some embodiments, the spacing between adjacent data tracks is varied to provide the first and second repeating periods.

6115348, Sep 5, 2000

Dec 24, 1997

8/997906

John M. Guerra - Concord MA

Calimetrics, Inc. - Alameda CA

G11B 700

369112

Storage density in an optical data storage media and system is increased many times the resolution limit by fully utilizing the much smaller detection limit by differentiating and isolating the active data sites in the media optically. The tracks are preordained and predisposed to a specific optical property and value that is different from that of its "n" nearest neighbors but is identical to its nth neighbor and to the optical properties of the reading and writing optical system.

6885618, Apr 26, 2005

Dec 16, 2003

10/737604

John M. Guerra - Concord MA, US
Dmitri Vezenov - Natick MA, US

LSI Logic Corporation - Milpitas CA

G11B007/00

369 4755, 369 5337

A method and apparatus for initializing an optical recording medium comprising a phase change material using a series of flashes of light. A series of low-power, high duty cycle flashes of light are produced to initialize the media to a crystalline form, onto which data may be recorded. In accordance with another aspect of this invention, a spiral flash bulb with centrally located connectors comprises the flash illumination source for initializing the optical recording media.

5774221, Jun 30, 1998

Aug 21, 1996

8/700810

John M. Guerra - Concord MA

Polaroid Corporation - Cambridge MA

G01B 1124

356376

Apparatus and methods for providing phase controlled evanescent illumination. The phase controlled evanescent illumination is useful for Imaging, metrology, and energy delivery. The light waves comprising the evanescent electromagnetic field are inhomogeneous in that their planes of equal phase are substantially perpendicular to the direction of propagation and to their planes of constant amplitude. The planes of equal phase are therefore normal to the surface to which the evanescent field is adjacent and to a sample surface illuminated by this field as well. Methods and means for dynamic or static phase shifting of inhomogeneous waves comprising the evanescent field are disclosed.