LIGHT INTERFERENCE TOMOGRAM ACQUIRING DEVICE, PROBE USED FOR LIGHT INTERFERENCE TOMOGRAM ACQUIRING DEVICE, AND LIGHT INTERFERENCE TOMOGRAM ACQUIRING METHOD

摘要

Disclosed is a light interference tomogram acquiring device enabling formation of a light interference tomogram with a high image quality by effectively eliminating the influence of reflection of the measurement light from a reflective surface of a focusing optical system from the light interference tomogram even though the light interference tomogram acquiring device has a simple configuration. A probe used for light interference tomogram acquiring devices and a light interference tomogram acquiring method are also disclosed. The reference optical path length from a coupler (BS)to a reference mirror (RM) is longer than the measurement optical path length from the coupler (BS) to the focus position (FP) of the subject (S). With this, even if pulse-shape waveforms (WS1, WS2) are produced by the interference between the reflected light from both surfaces of a parallel plate (PP) and the reference light, a waveform (WS3) representing a tissue of the subject (S) and a signal can be separated, the coherence of the waveform (WS3) acquired in a position near the origin is good, and the SN ratio of the signal is high. Therefore, a tomogram with high accuracy can be formed on the basis thereof.