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Title: A parameterized ray-tracing model for evaluation of hemispherical lensing of a uniform, telecentric object aperture -- performance improvement estimates for segmented scintillators with miniature lens arrays

Abstract

A parametric model describing the collimation of radiation from a uniform circular aperture by a hemispherical lens of the same radius has been developed for rapid estimation of the potential benefit of miniature dielectric lens arrays in lens-coupled gamma ray cameras (GRCs) with segmented scintillators. A simplified ray-tracing approach is adopted that makes use of small angle approximations relevant to GRCs used in nuclear science at Los Alamos National Laboratory and elsewhere. Application of this analysis technique in a first-pass design optimization process results in the optimistic estimate that miniature lenses fabricated from typical optical quality glass might boost optical coupling by as much as a factor of 4 (6 dB gain). However, this is not likely to be economically attractive compared to other techniques, such as reduction of the GRC lens f-number.

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1431105
Report Number(s):
LA-UR-18-22843
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Tobias, Benjamin John. A parameterized ray-tracing model for evaluation of hemispherical lensing of a uniform, telecentric object aperture -- performance improvement estimates for segmented scintillators with miniature lens arrays. United States: N. p., 2018. Web. doi:10.2172/1431105.
Tobias, Benjamin John. A parameterized ray-tracing model for evaluation of hemispherical lensing of a uniform, telecentric object aperture -- performance improvement estimates for segmented scintillators with miniature lens arrays. United States. doi:10.2172/1431105.
Tobias, Benjamin John. Tue . "A parameterized ray-tracing model for evaluation of hemispherical lensing of a uniform, telecentric object aperture -- performance improvement estimates for segmented scintillators with miniature lens arrays". United States. doi:10.2172/1431105. https://www.osti.gov/servlets/purl/1431105.
@article{osti_1431105,
title = {A parameterized ray-tracing model for evaluation of hemispherical lensing of a uniform, telecentric object aperture -- performance improvement estimates for segmented scintillators with miniature lens arrays},
author = {Tobias, Benjamin John},
abstractNote = {A parametric model describing the collimation of radiation from a uniform circular aperture by a hemispherical lens of the same radius has been developed for rapid estimation of the potential benefit of miniature dielectric lens arrays in lens-coupled gamma ray cameras (GRCs) with segmented scintillators. A simplified ray-tracing approach is adopted that makes use of small angle approximations relevant to GRCs used in nuclear science at Los Alamos National Laboratory and elsewhere. Application of this analysis technique in a first-pass design optimization process results in the optimistic estimate that miniature lenses fabricated from typical optical quality glass might boost optical coupling by as much as a factor of 4 (6 dB gain). However, this is not likely to be economically attractive compared to other techniques, such as reduction of the GRC lens f-number.},
doi = {10.2172/1431105},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 03 00:00:00 EDT 2018},
month = {Tue Apr 03 00:00:00 EDT 2018}
}

Technical Report:

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