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Optical device provided with optical element formed of medium exhibiting negative refraction

A technology for optical components and optical devices, which can be used in optical components, optics, instruments, etc., and can solve problems such as damage to specimens and lenses

Inactive Publication Date: 2008-11-05
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In the existing method, the sample surface, the optical disk surface or the crystal surface are in contact with the lens, water, oil, and the mask, or are only separated from the interval of about 30 nanometers, etc., because the action distance (hereinafter referred to as WD) is too short, So actually there is a problem of causing damage to the specimen and the lens, etc.

Method used

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  • Optical device provided with optical element formed of medium exhibiting negative refraction
  • Optical device provided with optical element formed of medium exhibiting negative refraction
  • Optical device provided with optical element formed of medium exhibiting negative refraction

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Embodiment Construction

[0082] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. figure 1 It is an embodiment of the present invention, and is an example of a reflection microscope 302 using a negative refractive index medium 301, and is placed in air. Light emitted from a light source 303 (for example, a laser light source, a mercury lamp, etc.) is incident on an objective lens 306 through an illumination lens 304 and a half mirror 305 . If the NA of the objective lens 306 is greater than 1, for example, the evanescent wave can be excited. The objective lens 306 includes an optical element formed of a medium having a positive refractive index, for example, lenses 306-1 and 306-2 made of glass.

[0083] figure 2 express figure 1 A magnified view of the vicinity of the objective lens 306. Here, the surface closest to the object side of the objective lens 306 is designated as 311 . The intermediate imaging point of the objective lens 306...

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PUM

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Abstract

A lens made of a medium exhibiting negative refraction is disclosed. Also, an optical element made of a medium exhibiting negative refraction is disclosed. The lens or optical element may be incorporated in an optical system or an optical apparatus.

Description

[0001] This application is a divisional application, the application number of the original application is 200580029841.4, the international application number is PCT / JP2005 / 016338, and the filing date is September 6, 2005. Component Optics". technical field [0002] The present invention relates to an optical device using an optical system such as an optical element, a microscope, a lithography optical system, and an optical disc optical system. Background technique [0003] Conventionally, in these optical systems, in order to improve resolution, it has been proposed to increase object-side NA by water immersion, oil immersion, or solid immersion (see Non-Patent Document 1 below). On the other hand, there are the following documents concerning substances (for example, photonic crystals) exhibiting different refractive properties from ordinary glass lenses and the like (see Non-Patent Documents 2 and 3 and Patent Documents 1, 2, 3 and 4) . [0004] Non-Patent Document 1: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/40G02B3/02
CPCG02B1/007
Inventor 西冈公彦
Owner OLYMPUS CORP