US2001001607A1PendingUtilityA1

Information recording and reproducing apparatus and method of recording and reproducing information using solid immersion lens having super resolution film deposited thereon

42
Priority: Nov 25, 1997Filed: Jan 18, 2001Published: May 24, 2001
Est. expiryNov 25, 2017(expired)· nominal 20-yr term from priority
Inventors:Yasushi MiyauchiKimio Nakamura
G11B 7/1387G11B 7/1353G11B 2007/13727G11B 7/122G11B 7/1374
42
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Claims

Abstract

An information recording and reproducing apparatus includes an optical head having a super resolution film formed therein. The optical head includes a laser for producing an energy beam, a lens for focusing the energy beam and a super resolution film disposed in a position on which the energy beams is focused by the lens, whereby recording and reproducing of high-density information is attained.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A method of recording and reproducing information in a recording medium by irradiation of an energy beam, wherein an optical head having a super resolution film formed therein is used.  
     
     
         2 . An information recording and reproducing method according to    claim 1   , wherein photochromic material is used for said super resolution film.  
     
     
         3 . An information recording and reproducing method according to    claim 2   , wherein a film having the transmissivity in the middle portion of a portion, to which said energy beam is irradiated, of said super resolution film, said transmissivity being increased when said energy beam is irradiated thereto and being reduced when the irradiation is stopped is used as said super resolution film.  
     
     
         4 . An information recording and reproducing method according to    claim 2   , wherein a multiphoton absorption film is used as said super resolution film.  
     
     
         5 . An information recording and reproducing method according to    claim 2   , wherein a photobleaching film is used as said super resolution film.  
     
     
         6 . An apparatus for recording and reproducing information in a recording medium by irradiation of an energy beam, comprising an optical head having a super resolution film formed therein.  
     
     
         7 . An information recording and reproducing apparatus according to    claim 6   , wherein said optical head comprises a laser for producing said energy beam, a lens for focusing said energy beam, and a super resolution film disposed in a position on which said energy beam is focused by said lens.  
     
     
         8 . A method of recording and reproducing information in a recording medium by irradiation of an energy beam, using a solid immersion lens (SIL) including a super resolution film formed in a bottom surface thereof.  
     
     
         9 . An information recording and reproducing method according to    claim 8   , wherein photochromic material is used for said super resolution film.  
     
     
         10 . An information recording and reproducing method according to    claim 9   , wherein a film having the transmissivity in the middle portion of a portion, to which said energy beam is irradiated, of said super resolution film, said transmissivity being increased when said energy beam is irradiated thereto and being reduced when the irradiation is stopped is used as said super resolution film.  
     
     
         11 . An information recording and reproducing method according to    claim 9   , wherein a multiphoton absorption film is used as said super resolution film.  
     
     
         12 . An information recording and reproducing method according to    claim 9   , wherein a photobleaching film is used as said super resolution film.  
     
     
         13 . An apparatus for recording and reproducing information in a recording medium by irradiation of an energy beam, comprising a solid immersion lens (SIL) including a super resolution film formed in a bottom surface thereof.  
     
     
         14 . An information recording and reproducing apparatus according to    claim 13   , further comprising a laser for producing said energy beam and a lens for focusing said energy beam, and 
 wherein said solid immersion lens focuses said energy beams from said lens on said super resolution film.    
     
     
         15 . A method of recording and reproducing information in a recording medium by irradiation of an energy beam, wherein a solid immersion lens (SIL) including a pin hole film formed in a bottom surface thereof and in which a hole smaller than an incident energy beam is formed is used.  
     
     
         16 . An apparatus for recording and reproducing information in a recording medium by irradiation of an energy beam, comprising a solid immersion lens (SIL) including a pin hole film formed in a bottom surface thereof and in which a hole smaller than an incident energy beam is formed.  
     
     
         17 . An information recording and reproducing apparatus according to    claim 16   , further comprising a laser for producing said energy beam and a lens for focusing said energy beam, and 
 wherein said solid immersion lens focuses said energy beams from said lens on said hole of said pin hole film.

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