【摘要】 根据透镜组基点性质和透镜组可变焦原理 ,设计定第二主点变焦光学系统。该系统用于视力矫正 ,在变焦过程中 ,“眼镜片光心”相对于眼睛的位置保持不变 ,是一种新型的光学变焦系统。用它可对近视、远视、散光等非正视眼进行快捷、准确的验光。更多还原

【Abstract】 According to the properties of basic points of lens group and the varifocal principle of lens group,a vari- focal optical system which has a fixed image space principal point has been designed.This system resembles a vi- sion - correcting system.When the focal lengths are changed,the distance between eyes and“eye- lens optical center”remains constant.This new type of varifocal optical system can allow optometrists to make prompt and precise diagnoses of abnormal eyes,and discover such problems as myopia hyperopia and astigmatism.更多还原