Thomas M Hagler

US Patent:

6388794, May 14, 2002

Filed:

May 1, 2001

Appl. No.:

09/846583

Inventors:

Thomas W. Hagler - Pleasanton CA 94566

International Classification:

G02B 2602

US Classification:

359236, 250226, 382278

Abstract:

A disc serving as a spatial radiation modulator has dispersed radiation filters thereon. Each filter has a transmittance or reflectance modulation function of the form sin (m+p /4), where m is a positive integer and p has one of the four values 0, 1, 2, 3. A radiation beam including selected wavelength components is diffracted into an elongated image dispersed according to wavelength. Different wavelength components are focused onto different filters on the modulator and are encoded by correspond filters. Since the modulation functions of the filters are orthogonal to one another, it is possible to extract the amplitude of each wavelength component after it has been encoded or modulated by corresponding filter from the total detected signal during one measurement.

US Patent:

6762833, Jul 13, 2004

Filed:

Feb 1, 2002

Appl. No.:

10/062607

Inventors:

Thomas W. Hagler - Pleasanton CA

Assignee:

Advanced Photometrics, Inc. - Grass Valley CA

International Classification:

G01J 304

US Classification:

356310, 356323, 356330, 359236, 25033907

Abstract:

A disc serving as a spatial radiation modulator has dispersed radiation filters thereon. Each filter has a transmittance or reflectance modulation function of the form sin (m+p /4), where m is a positive integer and p has one of the four values 0, 1, 2, 3. A radiation beam including selected wavelength components is diffracted into an elongated image dispersed according to wavelength. Different wavelength components are focused onto different filters on the modulator and are encoded by correspond filters. Since the modulation functions of the filters are orthogonal to one another, it is possible to extract the amplitude of each wavelength component after it has been encoded or modulated by corresponding filter from the total detected signal during one measurement.

US Patent:

6982788, Jan 3, 2006

Filed:

Jun 4, 2004

Appl. No.:

10/861816

Inventors:

Thomas W. Hagler - Pleasanton CA, US

Assignee:

Aspectrics, Inc. - Pleasanton CA

International Classification:

G01J 3/04
G01J 3/133

US Classification:

356310, 356323, 356326

Abstract:

A disc serving as a spatial radiation modulator has dispersed radiation filters thereon. Each filter has a transmittance or reflectance modulation function of the form sin(mθ+pπ/4), where m is a positive integer and p has one of the four values 0, 1, 2, 3. A radiation beam including selected wavelength components is diffracted into an elongated image dispersed according to wavelength. Different wavelength components are focused onto different filters on the modulator and are encoded by correspond filters. Since the modulation functions of the filters are orthogonal to one another, it is possible to extract the amplitude of each wavelength component after it has been encoded or modulated by corresponding filter from the total detected signal during one measurement.

US Patent:

62719173, Aug 7, 2001

Filed:

Jun 26, 1998

Appl. No.:

9/105279

Inventors:

Thomas W. Hagler - Pleasanton CA

International Classification:

G01J 304
G01J 3433

US Classification:

356310

Abstract:

A disc serving as a spatial radiation modulator has dispersed radiation filters thereon. Each filter has a transmittance or reflectance modulation function of the form sin. sup. 2 (m. theta. +p. pi. /4), where m is a positive integer and p has one of the four values 0, 1, 2, 3. A radiation beam including selected wavelength components is diffracted into an elongated image dispersed according to wavelength. Different wavelength components are focused onto different filters on the modulator and are encoded by correspond filters. Since the modulation functions of the filters are orthogonal to one another, it is possible to extract the amplitude of each wavelength component after it has been encoded or modulated by corresponding filter from the total detected signal during one measurement.