The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2019
Filed:
May. 29, 2015
Iti Scotland—scottish Enterprise, Glasgow, GB;
Damien Weidmann, Reading, GB;
Neil Angus Macleod, Oxford, GB;
ITI SCOTLAND—SCOTTISH ENTERPRISE, Glasgow, GB;
Abstract
The invention relates to a method and apparatus for reducing speckle noise in a system comprising a sensor for detecting electro-magnetic radiation backscattered from a target, comprising: illuminating the target with a first illuminating beam having a first optical path; illuminating the target with a second illuminating beam having a second optical path different to the first optical path; capturing at the sensor first and second backscattered radiation components associated with respectively the first and second illuminating beams, each of the backscattered radiation components comprising a speckle pattern; and taking a time-averaged measurement of the intensities of the first and second backscattered radiation components; wherein the capturing step is carried out within an integration time τ of the sensor, such that the time-averaged intensity measurement results in a decrease in speckle noise present in a signal representing the backscattered radiation.