Imaging with photoelastic modulators

Shane Nichols, John Freudenthal, Oriol Arteaga, Bart Kahr

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Photoelastic modulators (PEMs) are among the most robust and precise polarization modulation devices, but the high frequency free-running nature of PEMs challenges their incorporation into relatively slow CCD and CMOS imaging systems. Current methods to make PEMs compatible with imaging suffer from low light throughput or use high cost intensified CCDs. They are not ideal for some analyses (microscopy, reflectivity, fluorescence, etc.), and likely cannot be extended to polarimeters with more than two PEMs. We propose to modulate the light source with a square wave derived from particular linear combinations of the elementary PEM frequencies and phases. The real-time synthesis of the square waves can be achieved using a field programmable gate array (FPGA). Here we describe the operating principle.

Original languageEnglish (US)
Title of host publicationPolarization: Measurement, Analysis, and Remote Sensing XI
PublisherSPIE
Volume9099
ISBN (Print)9781628410365
DOIs
StatePublished - 2014
EventPolarization: Measurement, Analysis, and Remote Sensing XI - Baltimore, MD, United States
Duration: May 5 2014May 6 2014

Other

OtherPolarization: Measurement, Analysis, and Remote Sensing XI
CountryUnited States
CityBaltimore, MD
Period5/5/145/6/14

Fingerprint

Modulator
Modulators
modulators
Imaging
Imaging techniques
square waves
Charge coupled devices
charge coupled devices
Polarimeter
polarization modulation
Polarimeters
field-programmable gate arrays
polarimeters
Reflectivity
Imaging System
Microscopy
Imaging systems
Fluorescence
Field Programmable Gate Array
Light sources

Keywords

  • Ellipsometry
  • FPGA
  • Imaging
  • Microscopy
  • Mueller matrix
  • Photoelastic modulator
  • Polarimetry

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Nichols, S., Freudenthal, J., Arteaga, O., & Kahr, B. (2014). Imaging with photoelastic modulators. In Polarization: Measurement, Analysis, and Remote Sensing XI (Vol. 9099). [909912] SPIE. https://doi.org/10.1117/12.2053459

Imaging with photoelastic modulators. / Nichols, Shane; Freudenthal, John; Arteaga, Oriol; Kahr, Bart.

Polarization: Measurement, Analysis, and Remote Sensing XI. Vol. 9099 SPIE, 2014. 909912.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nichols, S, Freudenthal, J, Arteaga, O & Kahr, B 2014, Imaging with photoelastic modulators. in Polarization: Measurement, Analysis, and Remote Sensing XI. vol. 9099, 909912, SPIE, Polarization: Measurement, Analysis, and Remote Sensing XI, Baltimore, MD, United States, 5/5/14. https://doi.org/10.1117/12.2053459
Nichols S, Freudenthal J, Arteaga O, Kahr B. Imaging with photoelastic modulators. In Polarization: Measurement, Analysis, and Remote Sensing XI. Vol. 9099. SPIE. 2014. 909912 https://doi.org/10.1117/12.2053459
Nichols, Shane ; Freudenthal, John ; Arteaga, Oriol ; Kahr, Bart. / Imaging with photoelastic modulators. Polarization: Measurement, Analysis, and Remote Sensing XI. Vol. 9099 SPIE, 2014.
@inproceedings{a39ffa87996b444cbefe934ec22b89e1,
title = "Imaging with photoelastic modulators",
abstract = "Photoelastic modulators (PEMs) are among the most robust and precise polarization modulation devices, but the high frequency free-running nature of PEMs challenges their incorporation into relatively slow CCD and CMOS imaging systems. Current methods to make PEMs compatible with imaging suffer from low light throughput or use high cost intensified CCDs. They are not ideal for some analyses (microscopy, reflectivity, fluorescence, etc.), and likely cannot be extended to polarimeters with more than two PEMs. We propose to modulate the light source with a square wave derived from particular linear combinations of the elementary PEM frequencies and phases. The real-time synthesis of the square waves can be achieved using a field programmable gate array (FPGA). Here we describe the operating principle.",
keywords = "Ellipsometry, FPGA, Imaging, Microscopy, Mueller matrix, Photoelastic modulator, Polarimetry",
author = "Shane Nichols and John Freudenthal and Oriol Arteaga and Bart Kahr",
year = "2014",
doi = "10.1117/12.2053459",
language = "English (US)",
isbn = "9781628410365",
volume = "9099",
booktitle = "Polarization: Measurement, Analysis, and Remote Sensing XI",
publisher = "SPIE",

}

TY - GEN

T1 - Imaging with photoelastic modulators

AU - Nichols, Shane

AU - Freudenthal, John

AU - Arteaga, Oriol

AU - Kahr, Bart

PY - 2014

Y1 - 2014

N2 - Photoelastic modulators (PEMs) are among the most robust and precise polarization modulation devices, but the high frequency free-running nature of PEMs challenges their incorporation into relatively slow CCD and CMOS imaging systems. Current methods to make PEMs compatible with imaging suffer from low light throughput or use high cost intensified CCDs. They are not ideal for some analyses (microscopy, reflectivity, fluorescence, etc.), and likely cannot be extended to polarimeters with more than two PEMs. We propose to modulate the light source with a square wave derived from particular linear combinations of the elementary PEM frequencies and phases. The real-time synthesis of the square waves can be achieved using a field programmable gate array (FPGA). Here we describe the operating principle.

AB - Photoelastic modulators (PEMs) are among the most robust and precise polarization modulation devices, but the high frequency free-running nature of PEMs challenges their incorporation into relatively slow CCD and CMOS imaging systems. Current methods to make PEMs compatible with imaging suffer from low light throughput or use high cost intensified CCDs. They are not ideal for some analyses (microscopy, reflectivity, fluorescence, etc.), and likely cannot be extended to polarimeters with more than two PEMs. We propose to modulate the light source with a square wave derived from particular linear combinations of the elementary PEM frequencies and phases. The real-time synthesis of the square waves can be achieved using a field programmable gate array (FPGA). Here we describe the operating principle.

KW - Ellipsometry

KW - FPGA

KW - Imaging

KW - Microscopy

KW - Mueller matrix

KW - Photoelastic modulator

KW - Polarimetry

UR - http://www.scopus.com/inward/record.url?scp=84905727910&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84905727910&partnerID=8YFLogxK

U2 - 10.1117/12.2053459

DO - 10.1117/12.2053459

M3 - Conference contribution

SN - 9781628410365

VL - 9099

BT - Polarization: Measurement, Analysis, and Remote Sensing XI

PB - SPIE

ER -