Patent ID: 8493567
Filing Date: 2013-07-23
Classification: G01B

Abstract:
1. An optical tomographic image acquisition apparatus, comprising: a light source unit which emits light; a light dividing device which divides the light emitted from the light source unit into measurement light and reference light; a projecting device which is arranged inside a tubular sheath having translucency to project the measurement light divided by the light dividing device onto an object to be measured outside the sheath; a combining device which combines reflected light reflected from the object to be measured and the sheath and the reference light; an interference signal acquiring device which detects 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 which comprises a reflection member capable of reflecting the reference light and adjusts an optical path length of the reference light by moving the reflection member in an optical axis direction of the reference light; and a zero-path adjustment section which controls a position of a reflection member such that the interference signal acquired by the interference signal acquiring device becomes a predetermined frequency.