| 摘要 |
The invention relates to an optical coherence tomograph for examining an eye (3) comprising: an illuminating device (4, 5) for providing source radiation, the wavelength of which can be tuned; an illumination and measurement beam path (7), which has a dividing element (6) for dividing the source radiation into illumination radiation (B) and reference radiation (R), illuminates an illumination field in the eye (3) with the illumination radiation (B), and collects illumination radiation scattered back in the eye as measurement radiation (M), wherein the illumination and measurement beam path (7) has a scanner (13) for adjusting the lateral position of the illumination field in the eye (3) and a front optical unit (12) for adjusting the axial position of the illumination field in the eye (3); a reference beam path (8), which conducts the reference radiation (R) through a delay distance (21); a detection beam path (14, 15, 17), which receives the measurement radiation (M) from the illumination and measurement beam path (7) and the reference radiation (R) from the reference beam path (8) and conducts said measurement radiation and said reference radiation onto at least one flat panel detector (19, 19a, 19b) in a superposed manner; a beam splitter (11) for separating the measurement radiation (M) collected from the eye (3) from the illumination radiation (B) guided to the eye (3), wherein the beam splitter (11) conducts the separated measurement radiation (M) to the detection beam path (14, 15, 17); and an optical element (10) that acts only on the illumination radiation (B), which optical element interacts with the front optical unit (12) and sets the numerical aperture of the illumination of the illumination field in the eye (3); an optical element (14) that acts only on the measurement radiation, which optical element interacts with the front optical unit (12) and sets the numerical aperture with which measurement radiation (M) is collected in the eye (3); and an aperture (15), which is arranged in front of the at least one flat panel detector (19, 19a, 19b), is arranged in an intermediate image plane and defines the size of an object field from which the measurement radiation (M) reaches the flat panel detector (19, 19a, 19b), wherein the at least one flat panel detector (19, 19a, 19b) has a spatial resolution having 4 to 100 pixels in a direction, preferably as a 2-D flat panel detector having 5 to 50 pixels or 5 to 40 pixels. |
