Mark R Durham

US Patent:

20180039041, Feb 8, 2018

Filed:

Oct 11, 2017

Appl. No.:

15/730627

Inventors:

- West Melbourne FL, US
Brian Pekarek - Fairview TX, US
Mark E. Durham - Palm Bay FL, US
Ken Pietrasik - Murphy TX, US

Assignee:

DRS Network & Imaging Systems, LLC - West Melbourne FL

International Classification:

G02B 7/02
G02B 27/00
G03B 11/04

Abstract:

A method of fabricating an optical housing includes forming a pattern comprising a predetermined surface feature on an interior surface of the optical housing. The predetermined surface feature is configured to control reflections of stray light along an optical path between an aperture at a proximal end of the optical housing and a detector at a distal end of the optical housing.

US Patent:

20160018619, Jan 21, 2016

Filed:

Sep 29, 2015

Appl. No.:

14/869754

Inventors:

- Melbourne FL, US
Jeff R. Emmett - Sachse TX, US
Rachel L. Cooper - Wylie TX, US
Samuel E. Ivey - Richardson TX, US
Rohan G. Rodney - Dallas TX, US
Brian R. Pekarek - Fairview TX, US
Patrick J. Cronkite - Palm Bay FL, US
Mark E. Durham - Palm Bay FL, US

International Classification:

G02B 7/00
G02B 7/02

Abstract:

Embodiments of the invention are directed to a springless athermal lens assembly. In one embodiment, a spacer of a springless athermal lens assembly may compensate for defocus of the camera system due to thermal expansion of the lens assembly through the coupling of a spacer to an inner barrel and an outer barrel. The inner barrel comprises a lens cell assembly and a body. The outer barrel comprises a body. The spacer comprises a body having an inner surface and an outer surface. The outer surface of the spacer body is configured to be physically coupled to outer barrel body and the inner surface of the spacer body is configured to be physically coupled to the inner barrel body. A retainer ring is configured to engage with the outer surface of the spacer body and provide a radial force against the outer surface of the spacer body to securably engage the inner surface of the spacer body with the inner barrel body.

US Patent:

20150277077, Oct 1, 2015

Filed:

Mar 12, 2014

Appl. No.:

14/206186

Inventors:

- Melbourne FL, US
Brian R. Pekarek - Fairview TX, US
Mark E. Durham - Palm Bay FL, US
Ken Pietrasik - Murphy TX, US

Assignee:

DRS RSTA, INC. - Melbourne FL

International Classification:

G02B 7/02
G02B 5/09
G02B 27/00

Abstract:

Systems and methods for controlling stray light reflections are provided. An optical system includes an aperture having an optical axis passing therethrough, one or more optical elements disposed along an optical path, and a detector disposed along the optical path. The system further includes an optical housing disposed between the aperture and the detector. The interior surface of the optical housing includes a predetermined surface feature adapted to control reflections of stray light along the optical path between the aperture and the detector. A method of fabricating an optical housing includes forming a pattern comprising a predetermined surface feature on an interior surface of the optical housing. The predetermined surface feature is configured to control reflections of stray light along an optical path between an aperture at a proximal end of the optical housing and a detector at a distal end of the optical housing.

US Patent:

20140267764, Sep 18, 2014

Filed:

Mar 13, 2014

Appl. No.:

14/208560

Inventors:

- Melbourne FL, US
Mark E. Durham - Palm Bay FL, US
Patrick J. Cronkite - Palm Bay FL, US

Assignee:

DRS RSTA, INC. - Melbourne FL

International Classification:

G03B 13/32
H04N 5/33

US Classification:

348164

Abstract:

The disclosure describes systems and apparatuses that include a focusable lens, as well as methods for focusing the optical lens. The focusable lens system includes a single element lens having a concave refractive surface characterized by a first radius of curvature and a convex refractive surface characterized by a second radius of curvature larger than the first radius of curvature. A detector element generates electrical signals representative of infrared rays refracted by the single element lens and incident on the detector element, and an aperture stop is disposed around an optical axis of the optical system and secured in a constant position relative to the detector element, the aperture stop configured to limit a cone angle of rays refracted by the single element lens. They system also includes image processing circuitry configured to generate digital pixilation data based on electrical signals generated by the detector element.