MR. WILLIAM CLARK, ATC
Athletic Trainer at Silverbrook Rd, Lorton, VA

License number
Virginia 020202230
Category
Restorative Service Providers
Type
Athletic Trainer
Address
Address
8501 Silverbrook Rd, Lorton, VA 22079
Phone
(703) 446-1563

Professional information

William Clark Photo 1

Broadband Passive Optical Limiter Using A Photorefractive Crystal, Cylindrical Lens And Filter To Protect Against Substantially All Pulsewidths And Continuous Wave Lasers

US Patent:
5449904, Sep 12, 1995
Filed:
Nov 30, 1994
Appl. No.:
8/351202
Inventors:
Mary J. Miller - Springfield VA
Gregory J. Salamo - Fayetteville AR
William W. Clark - Lorton VA
Gary L. Wood - Centerville VA
Edward J. Sharp - Fredericksburg VA
Brian D. Monson - Tulsa OK
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
H01J 314, H01J 516, H01J 4014
US Classification:
250216
Abstract:
A passive broadband sensor protection and enhancement system and technique. ncident light is focused with a cylindrical lens on the optical axis into an intense light strip onto the input face of a photorefractive crystal on the optical axis. The crystal includes optional anti-reflection coatings proximate to the input and output face. A broadband high reflection coating is proximate to the input face for reflection of all radiation from approximately 0. 68 to at least out to 1. 5 micrometers wavelength. Light exiting from the output face of the crystal results from a photorefractive process that includes a transmitted beam and beam fan. The beam fan is fanned out of the optical path in a direction determined by the c-axis, dominant electro-optic coefficient, and charge carriers participating in the photorefractive process. The transmitted beam contains only incoherent radiation as input to a sensitive detector resulting in broadband multiline protection from the visible spectrum for substantially all pulsewidths and cw lasers, with enhanced time response and interaction length.


William Clark Photo 2

Mutually Pumped Phase Conjugator For Remote Identification

US Patent:
5317442, May 31, 1994
Filed:
Jul 29, 1993
Appl. No.:
8/098999
Inventors:
Edward J. Sharp - Fredericksburg VA
Gary L. Wood - Centreville VA
William W. Clark - Lorton VA
Gregory J. Salamo - Fayetteville AR
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
H04B 1000
US Classification:
359170
Abstract:
A universal IFF technique and system utilizes a real-time communication l established between both parties allowing the approximate immediate transferral of digital information with positive direction and identification of both parties achieved. A pump laser emits a first signal at a first position and a remote laser beacon emits a second signal at a second position, both signals at nominally the same wavelength. A MPPCM receives the first signal which establishes a beam fan. The MPPCM and first signal scans about a region of interest to intercept the second signal. The second signal provides a second input signal into the MPPCM so that a two-way phase conjugation signal builds up and lock-on is established.


William Clark Photo 3

Broadband Protector For Photodetectors

US Patent:
5739950, Apr 14, 1998
Filed:
Sep 1, 1989
Appl. No.:
7/411157
Inventors:
Gary L. Wood - Fairfax VA
William W. Clark - Lorton VA
Byong H. Ahn - Springfield VA
Edward J. Sharp - Fredericksburg VA
International Classification:
G02B 520
US Classification:
359359
Abstract:
A trilaminar semiconductor device is placed at an intermediate focus is an optical instrument having a sensitive photodetector. The layers of the device are successively in the form of a two-photon absorber, a sacrificial layer, and a multiple quantum well. The composition of the semiconductor is varied in the layers to achieve the desired bandgap and function.