Vibration reduction structure of low-temperature scanning near-field optical microscope

Abstract

The invention discloses a vibration reduction structure of a low temperature scanning near-field optical microscope (SNOM), and belongs to the field of manufacture of near-field optical instruments. The vibration reduction structure is characterized in that a vacuum cavity of the low temperature scanning near-field optical microscope is internally provided with a metal sleeve, a low temperature SNOM scanning head is hung on the top in the metal sleeve so as to play the role of primary vibration reduction action; further a magnetic damping vibration reduction device is arranged on the vibration reduction structure, a U-shaped copper frame of the magnetic damping vibration reduction device is partially fixed on the lower surface of a scanning head pedestal, and a corresponding magnet is fixed on a heat conduction copper disc; when the vibration reduction structure is vibrated, one edge of the U-shaped copper frame does a motion of cutting the magnetic line of force along one edge of the magnet so as to cause magnetic damping, thereby playing a secondary vibration reduction action. The vibration reduction structure provided by the invention can be used for reducing of the low temperature scanning near-field optical microscope.

Description

technical field [0001] The invention belongs to the technical field of manufacturing near-field optical instruments, in particular to a vibration-reducing structure of a low-temperature scanning near-field optical microscope. Background technique [0002] Near-field optical microscopy (SNOM) exploits near-field interactions and can achieve a resolution of less than 100 nm, far superior to far-field microscopy limited by diffraction barriers. The idea of ​​using near-field optics for imaging was first proposed by Synge in 1928, who showed that the combination of illuminating an object through a subwavelength aperture and a detector very close to the sample allowed high resolution to be obtained through a non-diffraction-limited process. The conventional experimental instrument that turned the principle into reality was completed by Pohl et al. in 1984, so that the scanning near-field optical microscope was realized, and the optical diffraction limit was truly broken. Scannin...

AI Technical Summary

Problems solved by technology

Existing SNOM equipment generally works under normal room temperature conditions, and the vibration reduction part is generally not strictly designed, and even the scanning part of SNOM is simply placed on the optical vibration reduction platform, which cannot meet the requirements of low-temperature vacuum environment. Vibration Reduction Requirements for Scanning Near-Field Optical Microscopy

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