Douglas B Anderson

6619804, Sep 16, 2003

Dec 31, 2001

10/036588

Michael T. Davis - Richardson TX
Douglas W. Anderson - Richardson TX

Texas Instruments Incorporated - Dallas TX

G03B 2128

353 98, 353 77, 348771

An optical engine (15) for an SLM-type display system, which may be either a front or rear projection system ( ). The optical engine ( ) provides for a high contrast, telecentric illumination angle to the SLM ( ) without compromising brightness by vignetting due to offset in the pupil. The resulting offset pupil is converted to a telecentric, on-axis image by a relay path ( ) between the SLM ( ) and the projection lens ( ). The relay path ( ) places the image at an intermediate image plane accessible by a the projection lens ( ), which permits the projection lens ( ) to be telecentric without an offset pupil.

6735462, May 11, 2004

Dec 21, 2000

09/747183

Paul Klocek - Dallas TX
Douglas W. Anderson - Richardson TX

Raytheon Company - Waltham MA

A61B 600

600473, 600407

An infrared imaging system ( ) includes a catheter ( ). The catheter is inserted into a small passageway, such as a blood vein ( ), in order to collect infrared information from the vein. The information is refracted by at least one lens ( ) in a collecting section ( ) of the catheter, and is imaged onto the ends ( ) of an array of optical fibers ( ). The fibers transmit the information to a relay lens ( ), which images the information onto respective detector elements of an infrared detector ( ). The infrared detector converts the information received from the relay lens into electrical information, which is transmitted to a circuit ( ). The circuit generates electrical data that is transmitted to a display ( ), which displays a visible image based on the infrared radiation emitted by the scene.

20020080495, Jun 27, 2002

Dec 21, 2000

09/747035

Douglas Anderson - Richardson TX, US

Raytheon Company

G02B027/14
G02B003/08

359/630000, 359/632000, 359/742000

A vehicle () includes an infrared imaging system, which has a collection device () that collects infrared radiation and supplies it through a cable () to a head-up display (). The head-up display includes an image generator () which produces a visible image corresponding to information collected by the collecting device, a lens () through which the visible image passes, and a reflector (). The reflector is a portion of the vehicle windshield (), and reflects the visible image toward the eyes of a driver (). The lens has on one side a Fresnel lens surface () with a rotationally symmetric power, and has on the opposite side a Fresnel lens surface () with a cylindrical power that compensates for asymmetric factors such as the curvature and tilt of the windshield.

52204529, Jun 15, 1993

Aug 7, 1991

7/742563

Douglas W. Anderson - Richardson TX

Texas Instruments Incorporated - Dallas TX

G02B 2722
G02B 2610
G02B 2720

359462

There is disclosed a method and system for controlling the optics of a coherent light source impacting a three dimensional defined volume. The system uses a scanner to time and spatially position the coherent light. The divergent light beam output of the scanner is then placed through positive and negative lenses to narrow the beam waist while also increasing the divergence angle of the beam. Provision is made to abate the divergence angle so that the light, as it impacts the defined volume, will not continue to diverge, creating a skewed image within the volume.

60089512, Dec 28, 1999

Dec 30, 1997

9/000685

Douglas W. Anderson - Richardson TX

Texas Instruments Incorporated - Dallas TX

G02B 1515
G02B 1514

359677

An offset reverse telephoto projection zoom lens 300 comprising a moving zoom group 302, a moving compensation group 304, and a fixed rear lens group 306. According to one embodiment of the projection lens, the zoom group 302 has four lenses, the compensation group 304 has four lenses, and the fixed rear group 306 has three lenses. An aperture stop 308 is located in the fixed rear group 306. The fixed rear group 306 has a small diameter which helps alleviate interference with illumination optics. Additionally, a fixed rear group 306 does not require zoom mechanisms at the rear of the lens 300 where space is at a premium.

49999117, Mar 19, 1991

Dec 19, 1989

7/454726

Douglas R. Anderson - Plano TX

Enginetech, Inc. - Dallas TX

B23P 700

2988842

A method and apparatus for remanufacturing a valve seat includes providing a valve having an oversize valve head (52) and an oversize valve stem (80). The oversize valve head has a seating surface (60) which rides higher in the valve seat (34) after resurfacing thereof. The seating surface (60) on the valve head (58) therefore rides higher on the new seating surface (66) in the valve seat (34). The oversize valve stem (80) accommodates a bored out valve guide (78) to allow a single size valve stem to be utilized. A keeper grove (84) is disposed on the upper end of the oversize valve stem (80) and dimensioned such that it is disposed a predetermined distance below the original dimension of a standard valve. This allows a predetermined amount of compression to be placed onto the valve spring (28) to account for fatigue therein.

53942620, Feb 28, 1995

Jun 18, 1993

8/077901

Douglas W. Anderson - Richardson TX

Texas Instruments Incorporated

G02B 2610
G02B 2722
G02B 2720

359196

There is disclosed a method and system for controlling the optics of a coherent light source impacting a three dimensional defined volume. The system uses a scanner to time and spatially position the coherent light. The divergent light beam output of the scanner is then placed through positive and negative lenses to narrow the beam waist while also increasing the divergence angle of the beam. Provision is made to abate the divergence angle so that the light, as it impacts the defined volume, will not continue to diverge, creating a skewed image within the volume.

62084704, Mar 27, 2001

Jun 23, 1999

9/339332

Douglas W. Anderson - Richardson TX
D. Scott Dewald - Dallas TX

Texas Instruments Incorporated - Dallas TX

G02B3/00;9/00;13/22

359649

A projection lens (400) having a BFD:EFL, ratio in the range of 0. 80:1 to 1. 60:1, an air equivalent BFD of at least 4. 3 inches, a throw ratio in the range of 3:1 to 6:1, and lateral color correction of one-quarter pixel when used with an SXGA modulator having pixels on 0. 17. mu. m centers, and operating with its chief rays telecentric at the plane of the modulator. The projection lens comprises an objective lens group (402), a telecentric lens group (404), and an aperture stop (414) between the objective lens group and the telecentric lens group.