Magnitude and direction of motion with speckle correlation and the optical fractional Fourier transform
The optical fractional Fourier transform (OFRT) in combination with speckle photography has previously been used to measure the magnitude of surface tilting and translation. Previous OFRT techniques used to determine motion have not been able to discern the direction of the tilt and translation. A simple new approach involving use of correlation is presented to overcome this limitation. Controlled variation of the minimum resolution and dynamical range of measurement is demonstrated. It is then experimentally confirmed that if a rigid body's motion is captured by two OFRT systems of different orders, the direction and magnitude of both the tilting and the in-plane translation motion of the body can be independently determined without a priori knowledge. The experimental results confirm the validity of previous theoretical predictions.
- OSTI ID:
- 20702434
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 14 Vol. 44; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Simultaneous measurement of translation and tilt using digital speckle photography
Speckle dynamics for intensity-modulated illumination
Speckle-based three-dimensional velocity measurement using spatial filtering velocimetry
Journal Article
·
Sun Jun 20 00:00:00 EDT 2010
· Applied Optics
·
OSTI ID:22036505
Speckle dynamics for intensity-modulated illumination
Journal Article
·
Thu Jul 10 00:00:00 EDT 2008
· Applied Optics
·
OSTI ID:21120890
Speckle-based three-dimensional velocity measurement using spatial filtering velocimetry
Journal Article
·
Sun Apr 10 00:00:00 EDT 2011
· Applied Optics
·
OSTI ID:22036613