Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Distance measurements by speckle correlation of objective speckle patterns, structured by the illumination

Not Accessible

Your library or personal account may give you access

Abstract

Objective speckles produced by two beams overlapping and interfering on a rough object surface contain information about the angle of incidence of the two beams, and how well they overlap. We obtain the autocovariance function for such a speckle pattern, and demonstrate how the information carried by the objective speckles can be used to probe the distance between the object and the observation plane. From a distance of 75 mm to a distance of 150 mm, and using an angle of 0.3 deg between the two incident beams, we can measure the actual distance with an uncertainty of better than ±0.1% of the full range. As long as the beams overlap at the object surface, the proposed method can measure distance with an uncertainty inversely proportional to the spot size at the object.

©2012 Optical Society of America

Full Article  |  PDF Article
More Like This
Spatial filtering velocimetry of objective speckles for measuring out-of-plane motion

M. L. Jakobsen, H. T. Yura, and S. G. Hanson
Appl. Opt. 51(9) 1396-1406 (2012)

Speckle and fringe dynamics in imaging-speckle-pattern interferometry for spatial-filtering velocimetry

Michael L. Jakobsen, Theis F. Q. Iversen, Harold T. Yura, and Steen G. Hanson
Appl. Opt. 50(28) 5577-5591 (2011)

Correlation distance of dynamic speckles

N. Takai, T. Iwai, and T. Asakura
Appl. Opt. 22(1) 170-177 (1983)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (23)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved