Ophthalmic photographing apparatus

An ophthalmic photographing apparatus comprising:

• an interference optical system arranged to divide light emitted from a first light source into measurement light and reference light, direct the measurement light to a fundus of an examinee's eye, direct the reference light to a reference optical system, and photo-receive by a first photodetector interference light that is obtained by combining the measurement light reflected from the fundus and the reference light;
• a first optical scanner disposed in an optical path of the measurement light and arranged to scan the measurement light in two dimensional directions on the fundus;
• a driving unit arranged to move an optical-path-length varying optical member in an optical axis direction, the optical member being disposed in one of the optical path of the measurement light and an optical path of the reference light and being capable of changing an optical path length of one of the measurement light and reference light;
• a photographing control unit arranged to:
• control an operation of the first optical scanner, scan the measurement light on the fundus of the examinee's eye, and obtain a tomographic image based on a photo-receiving signal outputted from the first photodetector, and
• control an operation of the driving unit to adjust a position of the optical-path-length varying optical member based on the obtained tomographic image so as to obtain a fundus tomographic image, and obtain the fundus tomographic image of the examinee's eye;
• and
• a calculation unit arranged to determine a photographing range of the tomographic image based on positional information of the optical-path-length varying optical member in a state that the fundus tomographic image is obtained, and information on the photographing view angle of the fundus tomographic image.