Patent ID: 9207064
Filing Date: 2015-12-08
Classification: G01B

Abstract:
1. An optical tomographic image acquisition apparatus, comprising: a light source unit which emits light whose wavelength is swept at a constant period time between a minimum sweep wavelength and a maximum sweep wavelength; a light dividing device which divides the light emitted from the light source unit into a measurement light and a reference light; an optical probe comprising a tubular sheath and an optical fiber arranged inside the sheath, the optical fiber configured to guide the measurement light divided by the light dividing device to an object to be measured outside the sheath and to guide a reflected light reflected from the object; a combining device which combines the reflected light reflected from the object to be measured and the sheath and the reference light; an interference signal acquiring device which detects an interference light between the reflected light and the reference light combined by the combining device and acquires the interference light as an interference signal; a signal and image processing section which acquires a tomographic information for generating an optical tomographic image at each scanning position of the object to be measured by performing signal processing of the interference signal acquired by the interference signal acquiring device; an optical path length adjustment device configured to adjust an optical path length of the reference light; and a zero-path adjustment section which controls the optical path length adjustment device such that the interference signal acquired by the interference signal acquiring device becomes a predetermined frequency.