| Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 19, Number 1, 2023
EOSAM 2022
|
|
|---|---|---|
| Article Number | 20 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/jeos/2023017 | |
| Published online | 26 April 2023 | |
Short Communication
Field evaluation of a novel holographic single-image depth reconstruction sensor
Universität Stuttgart, Institut für Technische Optik, Pfaffenwaldring 9, 70569 Stuttgart, Germany
* Corresponding author: hartlieb@ito.uni-stuttgart.de
Received:
30
January
2023
Accepted:
11
April
2023
A camera-based single-image sensor is presented, that is able to measure the distance of one or multiple object points (light emitters). The sensor consists of a camera, whose lens is upgraded with a diffractive optical element (DOE). It fulfils two tasks: adding a vortex point spread function (PSF) and replication of the vortex PSFs to a predefined pattern of K spots. Both, shape and rotation of the vortex PSF is sensitive to defocus. The sensor concept is presented and its capabilities evaluated both on axis and off-axis. The achieved standard deviation of the error ranges between 8.5 μm (on-axis) and 3.5 μm (off-axis) within a measurement range of 20 mm. However, as soon as calibration and measurement position no longer match, the accuracy is limited. An analysis of the effects responsible for this are also part of the publication.
Key words: Depth measurement / PSF modification / Diffractive optical element / Digital image correlation / Multipoint method / singleshot 3D
As this paper is written for the topical issue of the EOSAM 2022 conference, a part of this paper can be found in the proceeding submitted for this conference (see [11] and https://jeos.edpsciences.org)
© The Author(s), published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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