Patent ID: 11914119
Assignee: KONICA MINOLTA, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An ultraviolet optical system comprising:
an objective lens group that captures ultraviolet light for each angle from an ultraviolet light source and forms an intermediate image; and
an imaging lens group that re-images the intermediate image,
wherein neither the objective lens group nor the imaging lens group has a cemented surface, and all lenses included in the objective lens group and in the imaging lens group are single lenses that transmit ultraviolet light having a wavelength of 300 nm or shorter, and
the ultraviolet optical system satisfies a following conditional expression (1):, φ
            /
            φ
          
          ⁢
          
            
          
          ⁢
          1
        
        >
        2
      
    
    
      
        (
        1
        )
      
    
  

wherein
φ1 is an effective diameter of a lens surface positioned closest to an object side in an objective lens group, and
φ is a maximum effective diameter of lens surfaces in an entire system.