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:
Jun. 07, 2016
Filed:
Jul. 12, 2012
Frank Cichos, Berlin, DE;
Marco Braun, Leipzig, DE;
Markus Selmke, Leipzig, DE;
Romy Schachoff, Leipzig, DE;
Frank Cichos, Berlin, DE;
Marco Braun, Leipzig, DE;
Markus Selmke, Leipzig, DE;
Romy Schachoff, Leipzig, DE;
Universität Leipzig, Leipzig, DE;
Abstract
The invention relates to a method and a device for twin-focus photothermal correlation spectroscopy for the characterization of dynamical processes in liquids and biomaterials with the help of absorbing markers. Thereby non-fluorescent absorbing nano objects are heated by an intensity-modulated heating laser which leads to a refractive index gradient lens around the object. This refractive index gradient is detected by a detection laser with a focal volume that, depending on the position of the heated object relative to the focal plane of the detection beam, splits into two-sub-volumes forming a twin-focus comprising two sharply separated parts of a focal volume showing no spatial overlap.