| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device capable of adjusting diopter by using a reflection-type optical characteristic variable optical element and an optical characteristic variable mirror, etc., without installing mechanical moving parts. SOLUTION: The optical characteristic variable mirror 9 is constituted of a thin film 9a, coated with aluminum and plural electrodes 9b, and a power supply 12 is connected in between the thin film 9a and the electrodes 9b via a variable resistor 11 and a power supply switch 13, and the resistance value of the variable resistor 11 is controlled by a calculating device 14. The shape of the thin film 9a functioning as a reflection surface is controlled by changing the resistance value of each variable resistor 11, in accordance with a signal from the calculating device 14, so that the optimum image forming performance can be obtained. |
