Based on Michelson Interferometer
Light from the source (A) is divided into two beams on the prism (B). One light beam is directed to a mirror (C) and the other is directed to the object (D). The light returns to the prism (B) by reflection and interferes there as a function of the optical condition in the measuring object (D). The sensor (E) measures the bright / dark appearances of the interferences. These signals are then analysed with algorithms and software.
POCT (parallel optical coherence tomography)
Instead of a single sensor, the pOCT system has a sensor array of 300 x 300 individual image points, which are built-on a CMOS. The pOCT array captures 1 million two-dimensional images per second. The system provides three-dimensional images with the highest dynamics and the highest resolution.
ASP Array – OCT Technology – Exclusive tool for today’s industry
(ASP = active sensor pixel, OCT = optical coherence tomography)
The OCT technology is well known for medical applications, but was hardly used for industrial application. However, developments realised in recent years made the OCT technology a robust and reliable measuring method for production processes. And, the OCT technology operates at real-time conditions and with highest accuracy.
ASP array systems have integrated even functions such as data acquisition and signal processing on “pixel level”. The time-of-flight principle (TOF) is used to extract the interferometry features. The ASP architecture provides the demodulation of the optical signal within a pixel up to 100 kHz and the reconstruction of the amplitude and its phase.
The speed of image acquisition of ASP-OCT systems is 2 decimal power higher compared to conventional image sensors. This feature allows real-time tomography, topographical imaging in micrometer accuracy, and the highest speed in data acquisition.
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