Axially distributed sensing with a monoscopic imaging lens for single-shot distance measurements

Marc Sandner; Ervin Kolenović; Reiner Klattenhoff; Elam Kolenović; Frank Elandaloussi; Christoph von Kopylow; Ralf B. Bergmann

doi:10.1364/AO.53.005078

Applied Optics
Vol. 53,
Issue 22,
pp. 5078-5083
(2014)
•https://doi.org/10.1364/AO.53.005078

Axially distributed sensing with a monoscopic imaging lens for single-shot distance measurements

Marc Sandner, Ervin Kolenović, Reiner Klattenhoff, Elam Kolenović, Frank Elandaloussi, Christoph von Kopylow, and Ralf B. Bergmann

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Marc Sandner, Ervin Kolenović, Reiner Klattenhoff, Elam Kolenović, Frank Elandaloussi, Christoph von Kopylow, and Ralf B. Bergmann, "Axially distributed sensing with a monoscopic imaging lens for single-shot distance measurements," Appl. Opt. 53, 5078-5083 (2014)

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Related Topics
Table of Contents Category
- Machine Vision
Optics & Photonics Topics
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The topics in this list come from the Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Instrumentation, measurement, and metrology (120.0120)
- Lens system design (120.3620)
- Machine vision (150.0150)
- Three-dimensional sensing (150.6910)
- Imaging systems (170.0110)

About this Article
History
- Original Manuscript: May 16, 2014
- Revised Manuscript: July 3, 2014
- Manuscript Accepted: July 3, 2014
- Published: August 1, 2014

Abstract

Using the image-based optical measurement method known as axially distributed sensing (ADS), the depth information of a scene is retrieved by evaluating images recorded with a camera positioned on multiple points along a common optical axis. We describe the design of a monoscopic lens that images the scene from two different on-axis points of perspective simultaneously onto a single camera. Designed for use in a territorial surveillance video system, this lens allows for capturing 3D scene information based on ADS with a single shot. We present the physical foundations of this approach and its implementation as a compact lens system and show the usability of the system prototype, supported by performance tests.

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Req #	Description
1	Design based on off-the-shelf components
2	EP of subsystem 1 is near the field lens
3	Subsystems’ focal lengths $f_{1} = f_{2} = 15 mm$
4	Setup fits into TSS housing
5	Subsystems’ common path: field lens, BS1

Item #	Description	Optimization
1	Entrance pupil position	Keep
2	Effective focal length	Keep
3	Field vignetting	Minimize
4	Field curvature	Minimize
5	RMS spot radius	Minimize
6	Image distortion	Minimize

Property	Subsys. 1	Subsys. 2
Effective focal length $f$	14.95	14.96
Image space $F / #$	21.8	15.5
Pupil magnification $β_{p}$	3.64	4.18
Hyperfocal distance $d_{\infty}$	1.78 m	2.51 m
Hyperfocal near limit $d_{n}$	0.89 m	1.25 m

$d_{o 1}$ (m)	$d_{o 2}$ (m)	$d_{o 2} - d_{o 1}$ (m)	$Δ M$
1	2	1	0.02971
2	3	1	0.00994
5	6	1	0.00199
9	10	1	0.00066
1	3	2	0.03975
2	4	2	0.01491
5	7	2	0.00341
9	11	2	0.00120

Req #	Description
1	Design based on off-the-shelf components
2	EP of subsystem 1 is near the field lens
3	Subsystems’ focal lengths $f_{1} = f_{2} = 15 mm$
4	Setup fits into TSS housing
5	Subsystems’ common path: field lens, BS1

Abstract

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Cited By

Figures (10)

Tables (4)

Equations (9)

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