Persistent Link:
http://hdl.handle.net/10150/185663
Title:
The optical design of far-infrared detector arrays.
Author:
Milner, Thomas Edward.
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The imaging properties of far infrared detector arrays are analyzed. An arbitrary optical system imaging partially coherent light is reviewed. The imaging and detection process is correlated to the coherence properties of the imaged light. A selection set of optical flux concentrator arrays is set forth with reference to a literature review. A selection procedure for the concentrators is outlined which includes a derived performance function. Transverse and longitudinal detector geometries are frequently considered in far infrared imaging problems. A ray model is constructed to describe the optical-transverse detector system. The absorbed photon density in a transverse detector is computed with a Monte Carlo simulation. The subsequent transport of the photogenerated holes is evaluated by solving the steady state diffusion equation. With the evaluation of the steady state current density, transfer functions, point spread functions and diffusive cross talk are determined. With a Boltzmann transport equation approach, the response of a longitudinal detector array is analyzed. Signal equations are derived which relate the signal current density to the absorbed photon distribution and other relevant parameters. The various parameters derive from scattering and recombination of the photogenerated charges. Each parameter is qualitatively discussed, mathematically analyzed and algebraicly modeled. The absorbed photon distribution is computed with the aid of an optical multilayer model. The absorptive efficiency and the spatial distribution of the absorbed photons is computed for various layers of the longitudinal detector. The imaging response of the detector array is evaluated from the derived signal equations. An analytical expression is derived for the transfer function of an arbitrary optical-longitudinal detector array system. The derived transfer function includes the effects of diffusion and recombination of the photogenerated charges. Alternate measures of the detector's imaging response are derived; the transfer function, the point response function, the diffusive cross talk and the responsivity are computed as a function of various detector operating and design parameters. Conclusions which relate the detector's imaging performance to several operating and design parameters are made.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Dissertations, Academic; Optics; Astronomy; Astrophysics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Optical Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Rieke, George H.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe optical design of far-infrared detector arrays.en_US
dc.creatorMilner, Thomas Edward.en_US
dc.contributor.authorMilner, Thomas Edward.en_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe imaging properties of far infrared detector arrays are analyzed. An arbitrary optical system imaging partially coherent light is reviewed. The imaging and detection process is correlated to the coherence properties of the imaged light. A selection set of optical flux concentrator arrays is set forth with reference to a literature review. A selection procedure for the concentrators is outlined which includes a derived performance function. Transverse and longitudinal detector geometries are frequently considered in far infrared imaging problems. A ray model is constructed to describe the optical-transverse detector system. The absorbed photon density in a transverse detector is computed with a Monte Carlo simulation. The subsequent transport of the photogenerated holes is evaluated by solving the steady state diffusion equation. With the evaluation of the steady state current density, transfer functions, point spread functions and diffusive cross talk are determined. With a Boltzmann transport equation approach, the response of a longitudinal detector array is analyzed. Signal equations are derived which relate the signal current density to the absorbed photon distribution and other relevant parameters. The various parameters derive from scattering and recombination of the photogenerated charges. Each parameter is qualitatively discussed, mathematically analyzed and algebraicly modeled. The absorbed photon distribution is computed with the aid of an optical multilayer model. The absorptive efficiency and the spatial distribution of the absorbed photons is computed for various layers of the longitudinal detector. The imaging response of the detector array is evaluated from the derived signal equations. An analytical expression is derived for the transfer function of an arbitrary optical-longitudinal detector array system. The derived transfer function includes the effects of diffusion and recombination of the photogenerated charges. Alternate measures of the detector's imaging response are derived; the transfer function, the point response function, the diffusive cross talk and the responsivity are computed as a function of various detector operating and design parameters. Conclusions which relate the detector's imaging performance to several operating and design parameters are made.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectDissertations, Academicen_US
dc.subjectOpticsen_US
dc.subjectAstronomyen_US
dc.subjectAstrophysics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRieke, George H.en_US
dc.contributor.committeememberBurke, James J.en_US
dc.contributor.committeememberDereniak, Eustace L.en_US
dc.identifier.proquest9210271en_US
dc.identifier.oclc711888785en_US
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