Optical apparatus

Abstract

An optical apparatus uses a variable-optical-characteristic optical element whereby focusing, zooming or the like can be effected without moving a lens or the like and the whole optical apparatus can be arranged in a lightweight structure. The user wears a power transmitting unit 303 by hanging it from his/her neck, for example. The power transmitting unit 303 may be put in a clothes pocket or the like. The power transmitting unit 303 may be placed somewhere around the user. In the power transmitting unit 303 , a transmitting circuit 305 is driven by a power supply 304 to send an electromagnetic wave from a transmitting antenna 306 toward variable-focus eyeglasses 302 . The variable-focus eyeglasses 302 have a receiving antenna 307 provided on eyeglass frames 308 to receive the electromagnetic wave sent from the power transmitting unit 303 . The received electromagnetic wave is, for example, boosted in voltage and rectified to drive the variable-focus lenses.

1 . A variable-optical-characteristic optical element characterized by using a photomechanical effect. 
   
   
       2 . A variable-focus lens characterized by using a photomechanical effect. 
   
   
       3 . A variable mirror characterized by using a photomechanical effect. 
   
   
       4 . A variable-optical-characteristic optical element characterized by having at least two different kinds of light sources and using a photomechanical effect.