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Brent Lee Ellerbroek

from Honokaa, HI
Age ~70
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Also known as:
Brent L Ellerbroek, Brent Le Ellerbroek, Brent E Ellerbroek, Brent Lee Ellerbrock, Brent L Ellerbrock
Related to:
Nancy NeillValerie K Neill, 35Mary J EllerbroekDavid P Neill, 72Ruth A Bookstaber, 79Richard C SmithSarah K Mccall, 44Maria Gutierrez Her, 45Daniel EllerbroekStephanie S Rogers, 57Tina R SmithA Kenneth Ellerbroek, 38Joseph A NeillLaura A Kazan, 58Kenneth A Ellerbroek, 39Leonard P EllerbroekD R Bookstaber
Connected to:
Brian E Ellerbrock, 64Derrick J Ellerbrock, 32Dustin P Ellerbrock, 40Jennifer L Ellerbroek, 63Jordan L Ellerbrock, 31Katie M Ellerbrock, 36Philip H Ellerbrock, 43Trina M Ellerbrock, 50Karen D Ellerbusch, 77Alex Ellerby, 46

Brent Ellerbroek Phones & Addresses

  • Honokaa, HI
  • 2440 Las Lunas St, Pasadena, CA 91107 (626) 798-9087
  • 2615 Dove Creek Ln, Pasadena, CA 91107 (626) 798-9087
  • 3273 Chestnut Ave, Long Beach, CA 90806 (562) 492-1256
  • 134 Caviar Pl, Tucson, AZ 85745 (520) 624-7932
  • Albuquerque, NM
  • Hilo, HI
  • Valencia, CA
  • Houston, TX

Work

Company: Tmt observatory corporation Position: Instrumentation department head

Skills

Physics • Simulations

Industries

Research

Resumes

Resumes

Brent Ellerbroek Photo 1

Instrumentation Department Head

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Location:
Pasadena, CA
Industry:
Research
Work:
Tmt Observatory Corporation
Instrumentation Department Head
Skills:
Physics
Simulations

Publications

Us Patents

Piston Error Estimation Method For Segmented Aperture Optical Systems While Observing Arbitrary Unknown Extended Scenes

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US Patent:
51285304, Jul 7, 1992
Filed:
May 28, 1991
Appl. No.:
7/706458
Inventors:
Brent L. Ellerbroek - Albuquerque NM
Gerard L. Rafanelli - Fountain Valley CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01J 120
US Classification:
2502019
Abstract:
Relative piston misalignments between segments of a multisegment optical system, such as a segmented primary mirror, are reduced by a method in which elements of an arbitrary unknown extended scene image carried by an input beam are eliminated from the beam's error information in performing an error calculation. After appropriately processing the beam with the specialized sensor elements, spatial frequency domain representations of a variety of optical images are obtained which correspond to both individual segments, and to multiple combinations of segments of the optical system; each combination is preferably composed of two individual segments. The spatial frequency domain representations of the individual segments are then subtracted from the representations of the segment combinations to obtain spatial frequency domain functions for the combinations. These in turn are compared by a cross-coherence technique to derive spatial domain differences of piston differences misalignments between the combinations, from which the piston errors between individual segments can be calculated via a reconstruction matrix. The calculated piston errors are then used to make a compensating adjustment to the piston positions of the individual segments in the optical processing element.

Shearing Phase Difference Sensor

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US Patent:
47054000, Nov 10, 1987
Filed:
Dec 9, 1985
Appl. No.:
6/806893
Inventors:
Brent L. Ellerbroek - Los Angeles CA
Brian D. Cohn - El Segundo CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01B 902
US Classification:
356353
Abstract:
A shearing phase difference sensor including a high energy laser source for generating adjacent coherent light beam. Samples of the beams are extracted by an extracter and directed to an optical modifier. The optical modifier, positioned for intercepting the sample beams from the extracter, diffracts the beams and produces output beams which, in turn, are directed through a lens to a detector. The detector, positioned to intercept the output beams, produces electrical signals indicative of the output beams. The electrical signals are processed by a processor which calculates the phase difference between adjacent coherent light beams. Also, disclosed is a method for measuring the phase difference between adjacent coherent light beams.

Wavefront Error Estimation Derived From Observation Of Arbitrary Unknown Extended Scenes

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US Patent:
53509110, Sep 27, 1994
Filed:
Apr 9, 1993
Appl. No.:
8/045841
Inventors:
Gerard L. Rafanelli - Fountain Valley CA
Brent L. Ellerbroek - Albuquerque NM
Susan B. Mount - Toorance CA
Mark J. Rehfield - Ranch Palos Verde CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01J 120
US Classification:
2502019
Abstract:
An extended scene wavefront sensing apparatus and procedure that separates (deconvolves) scene effects from wavefront errors of an optical or similar system. The present wavefront sensing apparatus and procedure uses a point source wavefront slope sensor in scene scanning mode and estimates wavefront errors by using a cross-correlation or cross-coherence procedure that operates on the outputs of the point source wavefront slope sensor. A signal processing procedure employed by the point source wavefront slope sensor provides output signals corresponding to wavefront slopes at forward optics pupil locations geometrically projected to the location of the transmission and reflection measurement plane detector pairs. During the scanning process, each of the detector pairs (equivalent to a subaperture) measures the effects of the local unchanging wavefront error in the forward optical system and temporal variations due to the scanning scene. By cross correlating or cross-cohering each detector pair's temporal difference with differences from selected reference detector pairs, the scene induced variations in the measurement are eliminated, thereby leaving the stationary wavefront error component of the measurement.

Solid-State Wavefront Slope Determination

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US Patent:
46905553, Sep 1, 1987
Filed:
Nov 1, 1985
Appl. No.:
6/793941
Inventors:
Brent L. Ellerbroek - Los Angeles CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01J 100
US Classification:
356121
Abstract:
An adaptive laser system (10) incorporates a laser (12) and a novel system and method for determining the slope distribution of a laser beam wavefront. The sensor comprises a ramp filter (16) with a continuous monotonically varying transmittance function and two intensity distribution sensors (18 and 20). Lenses (24, 26 and 28) are provided for focusing and collimating the laser beam as appropriate. A processor (22) calculates the slope distribution from the two intensity distributions obtained by the intensity sensors. The slope calculations can be used to determine commands to predistort the laser beam to approximate a desired flat wavefront at the sensor. The transmittance function of the ramp filter is linear and its spatial width is considerably larger than the expected spreading of the beam due to distortions in the wavefront. Accordingly, the slope distribution is calculated by pointwise differencing the intensities, normalizing by dividing by the sum of the intensities, and scaling by a factor of one half. Accordingly, a solid state slope sensor which is fast, reliable, economical, and capable of high-resolution evaluations of pulsed as well as continuous wave laser beams is provided.

Method For Aligning An Optical System Utilizing Focal Plane Image Intensity Data

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US Patent:
44714475, Sep 11, 1984
Filed:
Sep 8, 1981
Appl. No.:
6/300072
Inventors:
Samuel G. L. Williams - Los Angeles CA
Ning Wu - Rancho Palos Verdes CA
Brent L. Ellerbroek - Los Angeles CA
Assignee:
Hughes Aircraft Company - El Segundo CA
International Classification:
G05B 1304
G01N 2100
G03B 300
US Classification:
364525
Abstract:
A complex optical system may be maintained in alignment by means of a technique in which an analytical model of the system is utilized which is assumed to be capable of essentially optimal performance. A physical example of the same system design is then assembled and a plurality of performance characteristics are measured related to the intensity function associated with a point source image on the system's focal plane detector array. A plurality of specific adjustments are then calculated by means of a second order approximation technique which would have the effect of degrading the performance of the analytical model to equal that measured for the physical example, whereupon compensating physical adjustments are made to the physical example to improve its measured performance.

Isbn (Books And Publications)

Advancements In Adaptive Optics: 21-25 June 2004, Glasgow, Scotland, United Kingdom

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Author

Brent L. Ellerbroek

ISBN #

0819454222

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Brent Lee Ellerbroek from Honokaa, HI, age ~70 Get Report