Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement
Author
Source
International Journal of Optics
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-07
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
We present a digital holographic method to increase height range measurement with a reduced phase ambiguity using a dual-directional illumination.
Small changes in the angle of incident illumination introduce phase differences between the recorded complex fields.
We decrease relative phase difference between the recorded complex fields 279 and 139 times by changing the angle of incident 0.5° and 1°, respectively.
A two cent Euro coin edge groove is used to measure the shape.
The groove depth is measured as ≈300 μm.
Further, numerical refocusing and analysis of speckle displacements in two different planes are used to measure the depth without a use of phase unwrapping process.
American Psychological Association (APA)
Khodadad, Davood. 2019. Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement. International Journal of Optics،Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1166609
Modern Language Association (MLA)
Khodadad, Davood. Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement. International Journal of Optics No. 2019 (2019), pp.1-6.
https://search.emarefa.net/detail/BIM-1166609
American Medical Association (AMA)
Khodadad, Davood. Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement. International Journal of Optics. 2019. Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1166609
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1166609