Optical apparatus

Abstract

An optical apparatus has an imaging optical system provided with a deformable mirror and an electronic zoom function that an image recorded in an image sensor by the imaging optical system is magnified by image processing. A ray deflecting function of the deformable mirror is changed in accordance with a change of an object area corresponding to an image to be used, and aberration of the imaging optical system is optimized. The deformable mirror is controlled by an arithmetical unit connected to an image processor and a driving circuit. The electronic zoom is performed with respect to the image recorded in the image sensor through a signal processing circuit and the image processor, and when the image is displayed on a display device, the deformable mirror is deformed so that sharpness at nearly the center of an object image formed on the image sensor is improved. This offers the optical apparatus in which a compact design is achieved, the magnification of the optical system can be changed, and the sharpness of the image is high even when a variable magnification ratio is increased.

1 . An optical apparatus comprising: 
 an optical system comprising a separable partial optical system;    a variable optical-property element arranged in the optical system,    a ray-deflecting function of the variable optical-property element being changeable itself;    a driving circuit for driving the variable optical-property element; and    an arithmetical circuit,    wherein the ray-deflecting function of the variable optical-property element is changed in accordance with a change of an object area corresponding to an image to be used so that aberration of the optical system caused by the change of the object area is compensated for.    
   
   
       2 . An optical apparatus comprising: 
 a variable magnification optical system comprising a separable partial optical system;    a variable optical-property element arranged in the variable magnification optical system, a ray-deflecting function of the variable optical-property element being changeable itself;    a driving circuit for driving the variable optical-property element; and    an arithmetical circuit,    wherein the ray-deflecting function of the variable optical-property element is changed in accordance with a magnification change of the variable magnification optical system so that aberration of the variable magnification optical system varied in accordance with the magnification change is compensated for.    
   
   
       3 . An optical apparatus comprising: 
 an optical system comprising a combination of a plurality of optical units;    a variable optical-property element arranged in one of the plurality of optical units, a ray-deflecting function of the variable optical-property element being changeable itself;    a driving circuit for driving the variable optical-property element; and    an arithmetical circuit,    wherein the plurality of optical units are independent of one another, and    wherein a ray-deflecting function of the variable optical-property element is changed in accordance with a change of the combination of the optical units so that aberration of the optical system varied in accordance with the change of the ray-deflecting function is compensated for.    
   
   
       4 . An optical apparatus comprising: 
 a variable magnification optical system comprising a combination of a plurality of optical units;    a variable optical-property element arranged in one of the plurality of optical units, a ray-deflecting function of the variable optical-property element being changeable itself;    a driving circuit for driving the variable optical-property element; and    an arithmetical circuit,    wherein the plurality of optical units are separable from one another, and    wherein a ray-deflecting function of ray deflection of the variable optical-property element is changed in accordance with a magnification change of the variable magnification optical system so that aberration of the variable magnification optical system varied in accordance with the magnification change is compensated for.    
   
   
       5 . An optical apparatus according to  claim 1 , wherein the optical apparatus is an observation apparatus.  
   
   
       6 . An optical apparatus according to  claim 1 , wherein the optical apparatus is a telescope.  
   
   
       7 . An optical apparatus according to  claim 1 , wherein the optical apparatus is a microscope.  
   
   
       8 . An optical apparatus according to  claim 1 , wherein the variable optical-property element is a variable focal-length lens.  
   
   
       9 . An optical apparatus according to  claim 1 , wherein the variable optical-property element is a variable mirror.