Device for optical coherence tomography

US8941840B2 · kind B2 · utility

Assignee

• WaveLight GmbH · DE

Inventors

• Ole Massow · Nuremberg, DE
• Henning Wisweh · Hannover, DE

Key dates

• Filing date: Mar 8, 2013
• Grant date: Jan 27, 2015
• Expiry date: Jun 5, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/4795
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In certain embodiments, a device for optical coherence tomography (OCT) includes a signal detection device and a computer arrangement. The signal detection device is designed to detect an interference signal (G(ω)) for an object to be imaged in an optical frequency range (ω). The computer arrangement is designed to determine intermediate signals (G1(k), G2(k)) in a spatial frequency range (k) from the interference signal (G(ω)), whereby each of the intermediate signals (G1(k), G2(k)) is dispersion-compensated for a different depth (z1, z2) of the object. A locally resolved image signal (FFT1, FFT2) is determined for each of the intermediate signals (G1(k), G2(k)) by applying a Fourier transformation to the particular intermediate signal (G1(k), G2(k)). A tomography signal (G(z)) is determined from the image signals (FFT1, FFT2).