Optical tomographic imaging apparatus

An optical tomographic imaging apparatus that takes a tomographic image of an object by splitting light from a light source into a measuring light and a reference light, guiding the measuring light to the object through scanning with a scanning optical system, and using a return light, which corresponds to the measuring light that is reflected or scattered by the object, and the reference light, the optical tomographic imaging apparatus comprising:

• a pre-scan imaging unit configured to take a tomographic pre-scan image;
• a focus position setting unit configured to set multiple focus positions within a predetermined imaging depth range of the pre-scan image;
• a reference position setting unit configured to set at least two reference positions in an imaging depth direction within the predetermined imaging depth range;
• a focus detecting unit configured to detect a focus condition of in-focus at the at least two reference positions;
• and
• a focus controlling unit configured to control the performance of focusing at the multiple focus positions sequentially based on the focus condition of in-focus.