Patent ID: 7434932

Claim:
An ophthalmic apparatus for obtaining ocular information on an examinee's eye without contacting the eye, the apparatus comprising: a first projection optical system comprising: a light source which emits light with short coherence length; and an optical member which disperses the light emitted from the light source, which makes a first portion of the dispersed light converge as a first light at a fundus of the eye; a second projection optical system which makes a second portion of the dispersed light converge as a second light at an anterior segment of the eye; a photo-receiving optical system comprising: an optical path length changing unit which changes at least one of an optical path length of the first light and an optical path length of the second light in order to synthesize the first light reflected from the fundus and the second light reflected from the anterior segment into interference light, and where the photo-receiving optical system disperses the interference light into frequency components, and photo-receives the dispersed interference light with a first photodetector; and a calculation part which obtains an axial length of the eye as ocular information based on a result obtained by analyzing an output signal from the first photodetector by means of Fourier transform and an amount of change of at least one of the optical path length of the first light and the optical path length of the second light.