Optical device

Abstract

In an optical device including an optical system to form an optical image of an object to be photographed, an image capture unit to convert the optical image of the object to be photographed into an electrical signal, and an optical device arranged on the front surface of the image capture unit, a water repellent layer or a structure with a three-dimensional pattern to reduce the adhesive force of an alien substance is provided on a surface of the optical element on the opposite side of the optical system.

1 . An optical device having image capture unit for converting an optical image of an object to be photographed into an electrical signal and an optical element which is arranged on a front surface of the image capture unit, 
 wherein a structure to reduce a crosslinking force of liquid on a surface of the optical element on a side of the object to be photographed is provided on the surface.    
   
   
       2 . An optical device having image capture unit for converting an optical image of an object to be photographed into an electrical signal and an optical element which is arranged on a front surface of the image capture unit, 
 wherein a structure to reduce a van der Waals force on a surface of the optical element on a side of the object to be photographed is provided on the surface.    
   
   
       3 . An optical device having image capture unit for converting an optical image of an object to be photographed into an electrical signal, 
 wherein a structure to reduce a crosslinking force of liquid on a surface of the image capture unit on a side of the object to be photographed is provided on the surface.    
   
   
       4 . An optical device having image capture unit for converting an optical image of an object to be photographed into an electrical signal, 
 wherein a structure to reduce a van der Waals force on a surface of the image capture unit on a side of the object to be photographed is provided on the surface.    
   
   
       5 . The equipment according to  claim 1 , wherein the structure to reduce the crosslinking force of liquid is a structure with a water repellent layer provided on the surface.  
   
   
       6 . The equipment according to  claim 5 , wherein the water repellent layer is a transparent fluorine-based thin film.  
   
   
       7 . The equipment according to  claim 1 , wherein the structure to reduce the crosslinking force of liquid is a structure with a fine three-dimensional pattern provided on the surface.  
   
   
       8 . The equipment according to  claim 2 , wherein the structure to reduce the van der Waals force is a structure with a fine three-dimensional pattern provided on the surface.  
   
   
       9 . The equipment according to  claim 7 , wherein the three-dimensional pattern has a pitch of not more than 380 nm.