| 摘要 |
<p>A subjective phorometer which may be a desk-type apparatus and in which all the measuring means are set on the desk plate and all the procedures for measuring vision data are performed by means of control switches on the desk, comprises, besides the same measuring elements as a conventional subjective phorometer, a number of pulse motors, electro-magnetic clutches each having a double-shaft mechanism, and direct current motors (38, 55, 41) for driving the measuring elements, a number of sensors for detecting the zero position of the measuring elements, a a central processing unit and control switches for controlling actuation of the pulse motors, electro-magnetic clutches and direct current motors (38, 55, 41), and a monitor for digitally displaying the vision data measured, and a printer, for printing the data. </p> |
