DAVID HOLMES BROWN
Pilots at Autumn Glory Ln, Huntsville, AL

6613498, Sep 2, 2003

Sep 16, 1999

09/397133

David R. Brown - Huntsville AL
Barry S. McCoy - Huntsville AL
Gerald Tuck - Huntsville AL
Miles Scott - Huntsville AL
Bruce Peters - Huntsville AL

MEMS Optical LLC - Huntsville AL

G03F 700

430322, 430323, 430321

A photolithographic process includes providing a layer of photoresistive material on a target substrate. Radiation is transmitted to the photoresistive material through a layer of absorbing material that absorbs the radiation with a transmittance proportional to the thickness of the absorbing material. A surface relief structure is formed in the absorbing material, so that the photoresistive material is only partially exposed in a pattern corresponding to the surface relief structure. Thus, when the photoresistive material is developed, it has a surface relief structure corresponding to the surface relief structure in the absorbing material. Etching the developed photoresistive material and target substrate then forms a surface relief structure in the target substrate that corresponds to the surface relief structure in the developed photoresistive material.

4123165, Oct 31, 1978

May 31, 1977

5/801885

David B. Brown - Huntsville AL
Jerry W. Vickers - Toney AL
Kynric M. Pell - Laramie WY

The United States of America as represented by the Secretary of the Army - Washington DC

G01B 1126

356152

A system is provided for remote determination of the attitude of a vehicle. nboard the vehicle are located two separate arrays of corner cube retroreflectors. Each array of retroreflectors is arranged to form a band around the vehicle at one axial position. The two arrays of reflectors incorporate different optical filters so that each array of reflectors and filters is optimized to provide retroreflection in a particular narrow band of the optical spectrum. Each array's optical spectrum band is different from the band used by the other array of reflectors. The system utilizes a remotely located transmitting-receiving station to provide tracking of the vehicle, continuously sweeping the vehicle with a light source located at the station so that position and attitude of the object, relative to the remote station, are obtained. Included at the ground station are two multimode, continuous wave lasers each providing a single two-color beam which matches the bands of the spectrum of the filtered retroreflecting arrays onboard the vehicle. The time intervals between the pulse receptions from the colored retroreflecting arrays provide the data to determine the vehicle attitude.

4047816, Sep 13, 1977

Jun 18, 1976

5/697308

Kynric M. Pell - Laramie WY
David B. Brown - Huntsville AL

The United States of America as represented by the Secretary of the Army - Washington DC

G01B 1126

356152

A system is provided for remote determination of the attitude of a vehicle. he system utilizes two remotely located transmitting-receiving stations and two retroreflecting single plane roof prisms mounted on a vehicle which may exhibit high angular rates about a roll axis relative to the angular rates about two other orthogonal axes. The two remotely located transmitter-receiver stations provide tracking of the vehicle, continuously illuminating the vehicle with a light source located at each station so that the position of the object relative to the remote stations is obtained.