Richard C Fischer

US Patent:

20030133184, Jul 17, 2003

Filed:

Dec 19, 2001

Appl. No.:

10/028601

Inventors:

Richard Fischer - Hudson WI, US
Bradley Guth - Hudson WI, US
Warren Ketola - St. Paul MN, US
James Riley - Inver Grove Heights MN, US

Assignee:

3M Innovative Properties Company

International Classification:

F21V009/06
G02B005/20
G02B001/00

US Classification:

359/361000, 359/350000

Abstract:

The present disclosure is directed to an optical filter that advantageously approximates sunlight that is both durable and stable for long periods of time when subject to harsh light intensity, thermal and moisture loads of accelerating weathering devices. The optical filter includes a glass having a lead content of between 0.5% and 50% by weight. In some examples, the filter can be constructed to have a thickness of 0.7 mm to 10 mm. In another aspect of the disclosure, the optical filter is part of an optical filter assembly suitable for manipulating spectral power distribution. The optical filter assembly includes a lead glass optical filter having a lead content of between 0.5% and 50% by weight and an ultraviolet transmissive optical filter. In one example, the ultraviolet transmissive optical filter is constructed from quartz glass. The ultraviolet transmissive optical filter can further include an infrared absorbing coating. In still another aspect of the present disclosure, an optical filter constructed from a lead glass has a thickness selected such that illumination passed through the lead glass has a first ratio and a second ratio. The first ratio is a first total irradiance for wavelengths shorter than 290 nm to a second total irradiance for wavelengths between 300 nm to 400 nm, such that the first ratio is less than 2.0×10. The second ratio is an irradiance at 310 nm to the second total irradiance, wherein the second ratio is at least 1.2×10.

US Patent:

20040178367, Sep 16, 2004

Filed:

Mar 17, 2004

Appl. No.:

10/802430

Inventors:

Richard Fischer - Hudson WI, US
Bradley Guth - Hudson WI, US
Warren Ketola - St. Paul MN, US
James Riley - Inver Grove Heights MN, US

Assignee:

3M Innovative Properties Company

International Classification:

G01J001/00

US Classification:

250/50400R

Abstract:

The present disclosure is directed to an optical filter that advantageously approximates sunlight that is both durable and stable for long periods of time when subject to harsh light intensity, thermal and moisture loads of accelerating weathering devices. The optical filter includes a glass having a lead content of between 0.5% and 50% by weight. In some examples, the filter can be constructed to have a thickness of 0.7 mm to 10 mm. In another aspect of the disclosure, the optical filter is part of an optical filter assembly suitable for manipulating spectral power distribution. The optical filter assembly includes a lead glass optical filter having a lead content of between 0.5% and 50% by weight and an ultraviolet transmissive optical filter. In one example, the ultraviolet transmissive optical filter is constructed from quartz glass. The ultraviolet transmissive optical filter can further include an infrared absorbing coating. In still another aspect of the present disclosure, an optical filter constructed from a lead glass has a thickness selected such that illumination passed through the lead glass has a first ratio and a second ratio. The first ratio is a first total irradiance for wavelengths shorter than 290 nm to a second total irradiance for wavelengths between 300 nm to 400 nm, such that the first ratio is less than 2.0×10. The second ratio is an irradiance at 310 nm to the second total irradiance, wherein the second ratio is at least 1.2×10.

US Patent:

20040209020, Oct 21, 2004

Filed:

Apr 15, 2003

Appl. No.:

10/413684

Inventors:

Stephanie Castiglione - Hudson WI, US
Olester Benson - Woodbury MN, US
Richard Fischer - Hudson WI, US
Stephen Johnson - Woodbury MN, US

Assignee:

3M Innovative Properties Company

International Classification:

E06B003/24

US Classification:

428/034000, 428/167000

Abstract:

An assembly including a polymeric film and an effective amount of an ultraviolet light-absorbing compound in an inert environment. The inert environment is bounded on at least one side by a pane, which is at least partially transparent to ultraviolet light. The ultraviolet light-absorbing compound includes a triazine. The structure may also include resin, adhesive and primer layers.

US Patent:

20040233520, Nov 25, 2004

Filed:

Jun 17, 2004

Appl. No.:

10/870748

Inventors:

Warren Ketola - St. Paul MN, US
Richard Fischer - Hudson WI, US

Assignee:

3M Innovative Properties Company

International Classification:

G02B005/20
F21V009/06

US Classification:

359/361000

Abstract:

The present disclosure is directed to an optical filter and an accelerated weathering device comprising an optical filter that advantageously approximates sunlight. The optical filter preferably comprises certain irradiance ratios.

US Patent:

20040246745, Dec 9, 2004

Filed:

Jun 4, 2003

Appl. No.:

10/454045

Inventors:

Geoffrey Morris - White Bear Lake MN, US
Richard Fischer - Hudson WI, US
Warren Ketola - St. Paul MN, US
Bradley Guth - Hudson WI, US

Assignee:

3M Innovative Properties Company

International Classification:

F21V021/30

US Classification:

362/583000, 362/257000

Abstract:

The invention relates to optical filters comprising an opacified portion. The optical filters are preferably suitable for use in illuminators for weathering devices.

US Patent:

20050037161, Feb 17, 2005

Filed:

Sep 24, 2004

Appl. No.:

10/950044

Inventors:

Stephanie Castiglione - Hudson WI, US
Richard Fischer - Hudson WI, US

International Classification:

E06B003/24

US Classification:

428034000

Abstract:

An assembly including a polymeric film in an inert environment is provided. The inert environment is bounded on at least one side by a pane comprising low emissivity glass.

US Patent:

20050075471, Apr 7, 2005

Filed:

Oct 1, 2004

Appl. No.:

10/957355

Inventors:

Wayne Fan - Cottage Grove MN, US
Nathaniel Langford - Somerset WI, US
Richard Fischer - Hudson WI, US
Amy Barnes - St. Paul MN, US

International Classification:

C08G018/00

US Classification:

528044000

Abstract:

A chemical composition comprises one or more urethane oligomers of at least two polymerized units selected from the group consisting of fluorine-containing urethane oligomers and long-chain hydrocarbon-containing urethane oligomers, wherein said oligomers comprise the reaction product of (a) one or more polyfunctional isocyanate compounds, (b) one or more polyols, (c) one or more monoalcohols selected from the group consisting of fluorocarbon monoalcohols, optionally substituted long-chain hydrocarbon monoalcohols, and mixtures thereof, (d) one or more silanes, and (e) one or more stabilizers comprising one or more reactive groups.

US Patent:

20050225847, Oct 13, 2005

Filed:

May 31, 2005

Appl. No.:

11/141231

Inventors:

Warren Ketola - St. Paul MN, US
Richard Fischer - Hudson WI, US

International Classification:

G02B005/20

US Classification:

359361000, 359350000

Abstract:

The present disclosure is directed to an optical filter and an accelerated weathering device comprising an optical filter that advantageously approximates sunlight. The optical filter preferably comprises certain irradiance ratios.