Optical recording system employing a solid immersion lens

• US 5,125,750 A
• Filed: 03/14/1991
• Issued: 06/30/1992
• Est. Priority Date: 03/14/1991
• Status: Expired due to Term

• Current Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Original Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Inventors: Mansfield, Scott M., Corle, Timothy R., Kino, Gordon S.
• Primary Examiner(s): Ben, Loha
• Application Number:
  US07/669,205
• Time in Patent Office: 474 Days
• Field of Search: 359/661, 359/664, 359/819, 359/823, 359/508, 359/510, 359/356, 359/646, 356/351, 369/43, 369/44.1, 369/44.39
• US Class Current: 359/819
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: G01Q 80/00 Applications, other than SPM, of scanning-probe techniques manufacture or treatment of nanostructures B82B3/00; recording or reproducing information using near-field interaction G11B9/12, G11B11/24, G11B13/08
• CPC Class Codes: G11B 2007/13727 Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
• CPC Class Codes: G11B 7/122 Flying-type heads, e.g. analogous to Winchester type in magnetic recording
• CPC Class Codes: G11B 7/1374 Objective lenses optical objectives per se G02B9/00
• CPC Class Codes: G11B 7/1387 using the near-field effect

Abstract

An optical recording system including a read/write optical assembly including an objective lens for reading or writing from an optical medium including a solid immersion lens disposed between the objective lens and having a surface closely spaced from the recording medium.

Claims

1. An optical system including a read/write head assembly for reading or writing information on an adjacent recording medium of the type which includes an objective lens for focusing light energy onto a recording medium, including a solid immersion lens disposed between the read/write head assembly and the recording medium, said solid immersion lens including a spherical surface facing said read/write head assembly and a flat surface closely spaced from said recording medium.

2. An optical system as in claim 1 in which said objective lens is moved up or down to focus optical energy at selected depths inside said recording medium.

3. An optical system as in claim 1 in which said solid immersion lens is mounted so that it can float on an air bearing caused by relative movement of the solid immersion lens and recording medium.

4. In an optical system including a read/write head assembly for reading or writing information on an adjacent recording medium of the type which includes a laser for providing light energy, an optical system including an objective lens for focusing light energy received from the laser, a solid immersion lens mounted between the objective lens and the recording medium, said solid immersion lens including a spherical surface facing said objective lens and a flat surface closely spaced from said recording medium, a phototransducer for receiving light energy reflected from said surface and polarization components for preventing light reflected from said recording medium to return to and interfere with the laser.

5. An optical system as in claim 4 in which said objective lens is moved up or down to focus optical energy at selected depths within said recording medium.

6. An optical system as in claim 4 in which said solid immersion lens is mounted so that it can float on an air bearing caused by relative movement between the recording medium and the optical recording medium.

7. An optical system including an objective lens for focusing light energy to or receiving light from a sample, a solid immersion lens mounted between the objective lens and said sample, said solid immersion lens including a spherical surface facing said objective lens and a flat surface closely spaced to the sample, and polarization components which act together as an optical isolator, said solid immersion lens including an optically active material in order to function as the quarter wave retarder in said optical isolator.

8. An optical system as in claim 7 used in conjunction with a read/write head assembly for reading or writing information on an adjacent recording medium.

9. An optical system as in claim 7 in which said solid immersion lens is an optically active material.

10. An optical system as in claim 7 in which said solid immersion lens includes a layer of optically active material.