TODD WILLARD ASHCRAFT
Pilots at Commonwealth Ave, Aurora, IL
License number
Illinois A2468705
Issued Date
Nov 2016
Expiration Date
Nov 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
229 S Commonwealth Ave, Aurora, IL 60506
Professional information
Common Lens Helmet Mounted Display
US Patent:
7375894, May 20, 2008
Filed:
Mar 7, 2006
Appl. No.:
11/370088
Inventors:
Todd Ashcraft - Aurora IL, US
Kenneth Scott Ellis - Tucson AZ, US
Richard Nicholas Pfisterer - Tucson AZ, US
Kenneth Scott Ellis - Tucson AZ, US
Richard Nicholas Pfisterer - Tucson AZ, US
Assignee:
Gentex Corporation - Carbondale PA
International Classification:
G02B 27/10, G09G 5/00, H04N 7/00
US Classification:
359627, 345 8, 348115
Abstract:
A common lens HMD is shown and described. The use of a common lens in a biocular or binocular helmet mounted display (HMD) system provides a means to manipulate light rays from an image(s) which are traveling from two or more separate upstream optics trains to the helmet visor and onward to each eye, with fields of view which overlap at the midpoint of the visor. The common lens changes the optical paths of each individual ray going to a single eye, and changes the corresponding ray traveling to the other eye in a mirrored fashion (i. e. with the opposite component in the Left/Right direction).
Apparatus And Method For Making And Assembling A Multi-Lens Optical Device
US Patent:
8284506, Oct 9, 2012
Filed:
Oct 21, 2008
Appl. No.:
12/255262
Inventors:
Todd W. Ashcraft - Aurora IL, US
Robert B. Atac - Batavia IL, US
James Risboskin - Jermyn PA, US
Timothy G. Allard - Dalton PA, US
Joseph J. Fontanella - Jessup PA, US
Mark J. Tremback - Mayfield PA, US
Robert B. Atac - Batavia IL, US
James Risboskin - Jermyn PA, US
Timothy G. Allard - Dalton PA, US
Joseph J. Fontanella - Jessup PA, US
Mark J. Tremback - Mayfield PA, US
Assignee:
Gentex Corporation - Carbondale PA
International Classification:
G02B 7/02
US Classification:
359819
Abstract:
A system for aligning a plurality of high-precision lenses in a lens train. Each of the lenses has at least two alignment tabs disposed around the perimeter of the lens. The lenses are aligned by placing the lenses in a jig having a plurality of high-precision alignment blocks. The lenses are attached to a lower-precision shroud, having slots that receive the alignment tabs. A gap-filling adhesive is used to provide a high-precision fit for the lenses in the shroud.
Fiber Optic Light Source For Display Devices
US Patent:
2004025, Dec 16, 2004
Filed:
Jun 16, 2003
Appl. No.:
10/462468
Inventors:
Robert Atac - Batavia IL, US
Todd Ashcraft - Aurora IL, US
Todd Ashcraft - Aurora IL, US
International Classification:
G02B006/26
US Classification:
385/031000
Abstract:
A light source includes at least one optical fiber having a length and first and second ends and at least one electromagnetic wave source disposed along at least a portion of the length of the fiber for transmitting electromagnetic waves through a side surface of the fiber. A reflective surface is disposed at the first end of the fiber for directing light generated within the fiber toward the second end. A heads-up display can make effective use of the light source.
Apparatus And Method For Making And Assembling A Multi-Lens Optical Device
US Patent:
2013000, Jan 3, 2013
Filed:
Sep 10, 2012
Appl. No.:
13/608757
Inventors:
Todd W. Ashcraft - Aurora IL, US
Robert B. Atac - Batavia IL, US
James Risboskin - Jermyn PA, US
Timothy G. Allard - Dalton PA, US
Joseph J. Fontanella - Jessup PA, US
Mark J. Tremback - Mayfield PA, US
Robert B. Atac - Batavia IL, US
James Risboskin - Jermyn PA, US
Timothy G. Allard - Dalton PA, US
Joseph J. Fontanella - Jessup PA, US
Mark J. Tremback - Mayfield PA, US
Assignee:
GENTEX CORPORATION - Simpson PA
International Classification:
G02B 7/02, B29D 11/00, C09J 5/00
US Classification:
359811, 156305, 264 27
Abstract:
A system for aligning a plurality of high-precision lenses in a lens train. Each of the lenses has at least two alignment tabs disposed around the perimeter of the lens. The lenses are aligned by placing the lenses in a jig having a plurality of high-precision alignment blocks. The lenses are attached to a lower-precision shroud, having slots that receive the alignment tabs. A gap-filling adhesive is used to provide a high-precision fit for the lenses in the shroud.