Comparison of approaches and artefacts in the measurement of detector modulation transfer functions

Chris Boothroyd; Takeshi Kasama; Rafal E. Dunin-Borkowski

doi:10.1016/j.ultramic.2013.03.001

Comparison of approaches and artefacts in the measurement of detector modulation transfer functions

Chris Boothroyd, Takeshi Kasama, Rafal E. Dunin-Borkowski

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

In order to investigate the reproducibility of measurements of transmission electron microscope detector modulation transfer functions (MTFs) we measure the MTF of a charge-coupled device (CCD) camera using five different methods. MTFs derived from a sharp edge, a circular aperture and electron holographic interference fringes are found to agree closely with one other. The difficulty of obtaining accurate measurements of MTFs and the potential of using focused electron probes to make direct measurements of MTFs is discussed. We highlight the sensitivity of image contrast after deconvolution to small differences in the measured MTF.

Original language	English
Journal	Ultramicroscopy
Volume	129
Pages (from-to)	18-29
ISSN	0304-3991
DOIs	https://doi.org/10.1016/j.ultramic.2013.03.001
Publication status	Published - 2013

Keywords

Charge-coupled device camera
Modulation transfer function
Point spread function

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10.1016/j.ultramic.2013.03.001

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title = "Comparison of approaches and artefacts in the measurement of detector modulation transfer functions",

abstract = "In order to investigate the reproducibility of measurements of transmission electron microscope detector modulation transfer functions (MTFs) we measure the MTF of a charge-coupled device (CCD) camera using five different methods. MTFs derived from a sharp edge, a circular aperture and electron holographic interference fringes are found to agree closely with one other. The difficulty of obtaining accurate measurements of MTFs and the potential of using focused electron probes to make direct measurements of MTFs is discussed. We highlight the sensitivity of image contrast after deconvolution to small differences in the measured MTF.",

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T1 - Comparison of approaches and artefacts in the measurement of detector modulation transfer functions

AU - Boothroyd, Chris

AU - Kasama, Takeshi

AU - Dunin-Borkowski, Rafal E.

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Y1 - 2013

N2 - In order to investigate the reproducibility of measurements of transmission electron microscope detector modulation transfer functions (MTFs) we measure the MTF of a charge-coupled device (CCD) camera using five different methods. MTFs derived from a sharp edge, a circular aperture and electron holographic interference fringes are found to agree closely with one other. The difficulty of obtaining accurate measurements of MTFs and the potential of using focused electron probes to make direct measurements of MTFs is discussed. We highlight the sensitivity of image contrast after deconvolution to small differences in the measured MTF.

AB - In order to investigate the reproducibility of measurements of transmission electron microscope detector modulation transfer functions (MTFs) we measure the MTF of a charge-coupled device (CCD) camera using five different methods. MTFs derived from a sharp edge, a circular aperture and electron holographic interference fringes are found to agree closely with one other. The difficulty of obtaining accurate measurements of MTFs and the potential of using focused electron probes to make direct measurements of MTFs is discussed. We highlight the sensitivity of image contrast after deconvolution to small differences in the measured MTF.

KW - Charge-coupled device camera

KW - Modulation transfer function

KW - Point spread function

U2 - 10.1016/j.ultramic.2013.03.001

DO - 10.1016/j.ultramic.2013.03.001

M3 - Journal article

C2 - 23548973

SN - 0304-3991

VL - 129

SP - 18

EP - 29

JO - Ultramicroscopy

JF - Ultramicroscopy

ER -

Comparison of approaches and artefacts in the measurement of detector modulation transfer functions

Abstract

Keywords

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