| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably irradiate a prescribed blood vessel with measurement light at all times. SOLUTION: Tracking light emitted from a light source 39 for illuminating a blood vessel is reflected by a beam expander 38 and a mirror 33, deflected by a prism 32 so as to be made incident on an eye E to be tested from a lower part to an optical axis, shaped into a desired shape through a mask 31 for tracking index shaping, then superimposed with the measurement light in a dichroic mirror 29, reflected by a lens 24 and a galvanometric mirror 22, passed through a black point plate 27, a concave mirror 28 and a semicircular plate 26 for optical path length correction, passed through the galvanometric mirror 22, passed through an image rotator 21, a band-pass mirror 12 and an objective lens 2 and made to illuminate an eye ground Ea. In such a manner, a measurement part is efficiently illuminated without being rejected by the upper arm or the breast.</p> |
