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David J Aastuen

from Shoreview, MN
Age ~64
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Also known as:
David Williams Aastuen, David W Aastuen, Dave J Aastuen, David A Awe, Benjamin Aastuen, David N
Phone and address:
3545 Harriet Ave, Saint Paul, MN 55126
(651) 766-5777
Related to:
Ellen Mildred Carlson, 94Scott Nelson, 62Joseph Nelson, 89Jon Nelson, 51Alyson Pysarsky, 35
Connected to:
Cassandra Aazad, 66Baktash Aazami, 49Khabira Aazeem, 77Gil M Aba, 39Omar B Aba, 37Mohammed Abaan, 51Reynaldo A Ababan, 64Carol J Ababio, 60David N Ababio, 67Frederick Ababio, 31

David Aastuen Phones & Addresses

  • 3545 Harriet Ave, Saint Paul, MN 55126 (651) 766-5777
  • Shoreview, MN
  • Menahga, MN
  • 1015 Westview Dr, Farmington, MN 55024
  • Lakeville, MN
  • Afton, MN
  • 3545 Harriet Ave, Saint Paul, MN 55126

Work

Company: 3m 2008 to 2013 Address: Mobile Interactive Solutions Division Position: Advanced optical specialist

Education

Degree: Ph.D. School / High School: University of Colorado at Boulder 1983 to 1990 Specialities: Physics

Skills

Physics • Optics • R&D • Materials Science • Optical Engineering • Thin Films • Design of Experiments • Polarization • Technology Transfer • Spectroscopy • Patents • Product Development • Simulations • Manufacturing • Nanotechnology • Polymers • Characterization • Testing • Materials • Research and Development

Industries

Consumer Electronics

Resumes

Resumes

David Aastuen Photo 1

Senior Product Development Engineer

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Location:
2525 Advance Rd, Madison, WI 53718
Industry:
Consumer Electronics
Work:
3M - Mobile Interactive Solutions Division 2008 - 2013
Advanced Optical Specialist
3M - Optical Systems Division Mar 2002 - Aug 2008
Advanced Research Specialist
3M - Display Materials Technology Center 1991 - 2002
Research Physicist
Education:
University of Colorado at Boulder 1983 - 1990
Ph.D., Physics St. Olaf College 1978 - 1982
BA cum laude, Physics (Departmental Distinction), Mathematics
Skills:
Physics
Optics
R&D
Materials Science
Optical Engineering
Thin Films
Design of Experiments
Polarization
Technology Transfer
Spectroscopy
Patents
Product Development
Simulations
Manufacturing
Nanotechnology
Polymers
Characterization
Testing
Materials
Research and Development

Publications

Us Patents

Reflective Lcd Projection System Using Wide-Angle Cartesian Polarizing Beam Splitter And Color Separation And Recombination Prisms

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US Patent:
20020109795, Aug 15, 2002
Filed:
Dec 22, 2000
Appl. No.:
09/746933
Inventors:
Charles Bruzzone - Woodbury MN, US
David Aastuen - Farmington MN, US
Roger Strharsky - Woodbury MN, US
Stephen Eckhardt - Austin TX, US
Michael Weber - Shoreview MN, US
Gary Boyd - Woodbury MN, US
International Classification:
G02F001/1335
US Classification:
349/009000
Abstract:
An optical imaging system including an illumination system, a Cartesian PBS, and a prism assembly. The illumination system provides a beam of light, the illumination system having an f/# less than or equal to 2.5. The Cartesian polarizing beam-splitter has a first tilt axis, oriented to receive the beam of light. A first polarized beam of light having one polarization direction is folded by the Cartesian polarizing beam splitter and a second polarized beam of light having a second polarization direction is transmitted by the Cartesian polarizing beam splitter. The Cartesian polarizing beam splitter nominally polarizes the beam of light with respect to the Cartesian beam-splitter to yield the first polarized beam in the first polarization direction. The color separation and recombination prism is optically aligned to receive the first polarized beam. The prism has a second tilt axis, a plurality of color separating surfaces, and a plurality of exit surfaces. The second tilt axis maybe oriented perpendicularly to the first tilt axis of the Cartesian polarizing beam-splitter so that the polarized beam is nominally polarization rotated into the second polarization direction with respect to the color separating surfaces and a respective beam of colored light exits through each of the exit surfaces. Each imager is placed at one of the exit surface of the color separating and recombining prism to receive one of the respective beams of colored light, wherein each imager can separately modulate the polarization state of the beam of colored light.

Method For Measuring The Absolute Light Throughput Of Reflective-Mode Displays In An Optical System

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US Patent:
20020126282, Sep 12, 2002
Filed:
Dec 28, 2000
Appl. No.:
09/750563
Inventors:
David Aastuen - Farmington MN, US
Charles Bruzzone - Woodbury MN, US
International Classification:
G01J004/00
US Classification:
356/364000
Abstract:
A method for measuring the absolute throughput of a polarization modulating reflective display in an optical system having a folded light path. The steps include measuring a first light intensity, LR, in the folded light path, having a first polarizing beam splitter, and a reflective display. A second intensity, LO, is measured using an unfolded light path where the reflective display is replaced by a second cross-rotated polarizing beam splitter. The absolute throughput is TM is calculated, where TM = LR/LO.

Projection System Having Low Astigmatism

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US Patent:
20030038923, Feb 27, 2003
Filed:
Jun 11, 2001
Appl. No.:
09/878559
Inventors:
David Aastuen - Farmington MN, US
Charles Bruzzone - Woodbury MN, US
Stephen Eckhardt - Austin TX, US
Jiaying Ma - Maplewood MN, US
Assignee:
3M Innovative Properties Company
International Classification:
G03B021/00
US Classification:
353/031000
Abstract:
Generally, the present invention relates to an apparatus for reducing astigmatism in a projection system that is particularly well suited to reducing astigmatism in LCD projection systems. A projection system includes a light source to generate light, conditioning optics to condition the light from the light source and an imaging core to impose on image on conditioned light from the conditioning optics to form image light. The imaging core includes a polarizing beamsplitter and at least one imager, and at least one element in the imaging core is adapted to reduce astigmatism in the image light. The astigmatism may arise in the polarizing beamsplitter. A projection lens system projects the astigmatism-reduced image light from the imaging core.

Projection System Having Low Astigmatism

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US Patent:
20030048423, Mar 13, 2003
Filed:
May 29, 2002
Appl. No.:
10/159694
Inventors:
David Aastuen - Farmington MN, US
Charles Bruzzone - Woodbury MN, US
Jiaying Ma - Maplewood MN, US
International Classification:
G03B021/00
US Classification:
353/031000
Abstract:
LCD projection systems that use reflective LCD imager units commonly use one or more polarization beamsplitters to separate the light incident on the imager from the light reflected by one or more respective imagers. The polarizing beamsplitters introduce astigmatism to the image light from the imagers. According to the present invention, the polarization beamsplitters are adapted to reduce the astigmatism.

Polarizing Beam Splitter

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US Patent:
20030184864, Oct 2, 2003
Filed:
Nov 15, 2002
Appl. No.:
10/295674
Inventors:
Charles Bruzzone - Woodbury MN, US
David Aastuen - Farmington MN, US
Roger Strharsky - Woodbury MN, US
Stephen Eckhardt - Austin TX, US
Michael Weber - Shoreview MN, US
Assignee:
3M Innovative Properties Company
International Classification:
G02B005/30
US Classification:
359/495000, 359/500000
Abstract:
An optical imaging system including a wide-angle Cartesian polarizing beam splitter, light valve illumination optics having an ƒ/#2.5, and at least one reflective light valve. The Cartesian polarizing beam splitter (PBS) has a structural orientation defining fixed polarization axes. The use of a Cartesian PBS allows the development of systems using curved PBS that provide higher light output and/or replace or augment other optical components. By recognizing and advantageously applying properties of wide-angle Cartesian polarizers, the present invention discloses a high-efficiency optical imaging system capable of functioning at ƒ#'s equal to or below ƒ/2.5 while maintaining a contrast ratio of at least 100 to 1, or, more preferably, 150 to 1 in a projection system configuration.

Projection Display System

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US Patent:
20030214632, Nov 20, 2003
Filed:
May 16, 2002
Appl. No.:
10/151698
Inventors:
Jiaying Ma - Maplewood MN, US
David Aastuen - Shoreview MN, US
Abolghassem Mahmoodi - St. Paul MN, US
International Classification:
G03B021/00
US Classification:
353/031000
Abstract:
In one embodiment, a projection screen includes a diffuse reflecting polarizer that diffusively reflects light polarized in a first direction and transmits light polarized in a second direction. The projection screen may also include a second polarizer adjacent a back side of the diffuse reflecting polarizer, wherein the second polarizer is oriented to transmit light polarized in the second direction. The projection screen may appear substantially diffuse when viewed from a front side and substantially transparent when viewed from a back side.

Projection System Having Low Astigmatism

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US Patent:
20040130681, Jul 8, 2004
Filed:
Dec 18, 2003
Appl. No.:
10/740287
Inventors:
David Aastuen - Farmington MN, US
Charles Bruzzone - Woodbury MN, US
Stephen Eckhardt - Austin TX, US
Jiaying Ma - Maplewood MN, US
Assignee:
3M Innovative Properties Company
International Classification:
G03B021/14
US Classification:
353/020000
Abstract:
Generally, the present invention relates to an apparatus for reducing astigmatism in a projection system that is particularly well suited to reducing astigmatism in LCD projection systems. A projection system includes a light source to generate light, conditioning optics to condition the light from the light source and an imaging core to impose on image on conditioned light from the conditioning optics to form image light. The imaging core includes a polarizing beamsplitter and at least one imager, and at least one element in the imaging core is adapted to reduce astigmatism in the image light. The astigmatism may arise in the polarizing beamsplitter. A projection lens system projects the astigmatism-reduced image light from the imaging core.

Highly Efficient Single Panel And Two Panel Projection Engines

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US Patent:
20040227898, Nov 18, 2004
Filed:
May 16, 2003
Appl. No.:
10/439449
Inventors:
Jiaying Ma - Maplewood MN, US
Charles Bruzzone - Woodbury MN, US
David Aastuen - Farmington MN, US
International Classification:
G03B021/14
US Classification:
353/020000
Abstract:
Single imager projection systems suffer from low light throughput, compared to three imager systems, because only one color band is illuminated at any one time. As a result, there is a need to increase the operating efficiency of the single imager projection system. The invention is directed to the incorporation of a high extinction ratio pre-polarizer, such as a compensated, multi-layer polarizer, in a single or dual imager projection system. This permits illumination with low f-number illumination light, and thus increases the efficiency of the projection system. The pre-polarizer may be incorporated within a polarization recovery unit to further enhance system efficiency.
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David J Aastuen from Shoreview, MN, age ~64 Get Report