William J Cottrell

7006234, Feb 28, 2006

Jul 9, 2004

10/888465

William Jude Cottrell - Rochester NY, US
Thomas George Ference - Essex Junction VT, US

Interphase Technologies, Inc. - Essex Junction VT

G01B 9/02

356515, 356495, 356521

A common-path, point-diffraction, phase-shifting interferometer uses a half wave plate having a diffractive element, such as pin hole. A coherent, polarized light source simultaneously generates a reference beam from the diffractive element and an object beam from remaining portions of the light going through the half wave plate. The reference beam has a nearly spherical wavefront. Each of the two beams possesses a different polarization state. The object and reference beams are then independently phase modulated by a polarization sensitive phase modulator that shifts phase an amount depending on applied voltage and depending on polarization state of the incident light. A polarizer is then used to provide the object and reference beams in the same polarization state with equal intensities so they can interfere to create an interferogram with near unity contrast.

8515222, Aug 20, 2013

Dec 20, 2010

12/973152

William J. Cottrell - Somerville MA, US
Nathan G. Kennedy - North Andover MA, US

Raytheon Company - Waltham MA

G02B 6/26
G02B 6/42

385 31, 385 38

Methods and apparatus for a fiber optic display screen of adjustable size. In one embodiment, a screen comprises: a plurality of pixels formed by a terminal end of at least one optical fiber, wherein the pixels are substantially equidistant from each other along a first axis in a first screen size and in a second screen size that is larger than the first size.

8594475, Nov 26, 2013

Dec 20, 2010

12/973010

William J. Cottrell - Somerville MA, US
Nathan G. Kennedy - North Andover MA, US

Raytheon Company - Waltham MA

G02B 6/04
G02B 6/06

385115, 385116

Methods and apparatus for a fiber optic display system. In one embodiment, a fiber optic display screen comprises a laser source, relay optics to receive an output from the laser source, condenser optics coupled to the relay optics, a digital pixelator coupled to the condenser optics, a fiber optic transmission line coupled to the digital pixelator, and a fiber optic screen provided by terminal ends of fibers in the fiber optic transmission line.

8602606, Dec 10, 2013

Dec 20, 2010

12/973081

William J. Cottrell - Somerville MA, US
Nathan G. Kennedy - North Andover MA, US

Raytheon Company - Waltham MA

F21V 17/02

362322, 362317, 362319, 362341, 362346, 362553

Methods and apparatus for a free space coupler to receive light from a laser via air. In one embodiment, a system comprises a laser source, a mirror optically aligned to the laser source, a first mount to control a position of the mirror, a free-space coupler to receive light from the mirror, a beam splitter to receive light exiting the coupler, a first detector to receive light reflected from the beam splitter, a second mount coupled to the first detector and to the coupler to control a position of the coupler from information from the first detector, and a second detector to receive light reflected by the coupler and the mirror, wherein the second detector is coupled to the first mount for positioning the mirror with respect to the coupler.

20070282404, Dec 6, 2007

Apr 6, 2007

11/783199

William Cottrell - Pittsford NY, US
Thomas Foster - Rochester NY, US

University of Rochester - Rochester NY

A61B 1/06
A61N 5/06
A61N 5/067

607089000, 362572000, 607088000

An optical probe has multiple side-firing optical fibers which terminate in a linearly staggered fashion. A central fiber can be used as well. In diagnostic techniques, one fiber can be used as an emitter, while the others are used as receivers, or various fibers can be used as emitters and receivers at different times to form a map of the area. In therapeutic techniques, the treatment light can be emitted from the fibers in parallel or in sequence, and the fluence can be independently adjusted for each of the fibers. Therapy is readily combined with diagnosis and monitoring by directing the therapeutic light through the central fiber and using the side-firing fibers for reflectance and/or fluorescence spectroscopy before, during, and after therapy.

20090043296, Feb 12, 2009

Jun 30, 2005

11/631121

Thomas H. Foster - Rochester NY, US
William J. Cottrell - Dallas TX, US
Chad Bigelow - Somerville MA, US
Allan R. Oseroff - Buffalo NY, US

UNIVERSITY OF ROCHESTER - Rochester NY

A61B 18/18
A61B 6/00
G02B 6/26

606 11, 600476, 385 25, 385 45

An instrument for photodynamic therapy applies treatment light from a dye laser, white light, and ultraviolet fluorescence excitation light from an LED onto a lesion and surrounding areas in a time-multiplexed manner. The reflected white light is analyzed in a spectrometer to determine a correction for the dynamic optical spectral properties of the patient's tissue. Light emitted by fluorescence from the lesion and the surrounding areas is analyzed in another spectrometer, and the results are corrected in a computer, using the correction. An optical switch has been developed for the instrument, using a bistable solenoid and a sled.

20090221921, Sep 3, 2009

Apr 9, 2007

12/296886

William J. Cottrell - Somerville MA, US
Thomas Foster - Rochester NY, US

A61B 6/00
A61B 18/22
A61N 5/067

600478, 606 15

An optical probe has multiple side-firing optical fibers which terminate in a linearly staggered fashion. A central fiber can be used as well. In diagnostic techniques, one fiber can be used as an emitter, while the others are used as receivers, or various fibers can be used as emitters and receivers at different times to form a map of the area. In therapeutic techniques, the treatment light can be emitted from the fibers in parallel or in sequence, and the fluence can be independently adjusted for each of the fibers.

20100292762, Nov 18, 2010

Oct 20, 2008

12/738196

William J. Cottrell - Somerville MA, US
Thomas H. Foster - Rochester NY, US
Allan R. Oseroff - Buffalo NY, US
Stephanie H. Pincus - Buffalo NY, US
Tammy Lee - Rochester NY, US

A61N 5/06

607 88

In a first embodiment, there is no monitoring, and instead light is delivered according to a predetermined ‘recipe.’ In a second embodiment, the instrumentation provides a means for making the reflectance measurements during therapy without requiring the brief interruption. This device may therefore allow more accurate measurement of treatment-induced changes to the reflectance measurement. In a third embodiment, an adjustable aperture is used to constrict the area of a treatment beam.