| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely adjust the focus even when there is aberration in the eye to be tested. <P>SOLUTION: A tester observes an image projected to a monitor, operates a focus knob, and arranges focus index images Fb and Fc in a row. When there is little optical aberration in the eye E to be tested, two images on fundus by a primary sensor overlap to become a sensor image Sab as is shown in (a). When there is aberration in the eye E to be tested and a conjugated plane of the fundus before the vicinity of the conjugated plane, two sensor images Sa and Sb are displaced vertically and, as is shown in (b), the sensor image Sa is displaced downward and the sensor image Sb is displaced upward. On the contrary, when there is a conjugated plane of the fundus at the end of the vicinity of a conjugated plane A, the sensor image Sa is displaced upward and the sensor image Sb is displaced downward as is shown in (c). <P>COPYRIGHT: (C)2010,JPO&INPIT |
