Patent ID: 9706928
Date: 2017-07-18
CPC Classifications: A61B,G01J,G01Q,Y10S

Claim:
1. An optical head for revealing near field through beams irradiated from a light source of a far field optical system, the optical head comprising: a flexible substrate made of a soft material and adapted to allow the optical head to be brought into close contact with a measured object and attached thereto even if the measured object has a curved or flat surface; and a near-field revelation part located between the measured object and the flexible substrate in such a manner as to have one side brought into contact with the flexible substrate and the other side detachably attached to the measured object and adapted to reveal the near field through the beams irradiated from the light source, wherein the near-field revelation part comprises: a layer for formation of dynamic optical nano apertures; a first dielectric protective layer formed on top of the layer for formation of dynamic optical nano apertures to prevent the generation of degradation and mixing caused by the inter-diffusion between the layer for formation of dynamic optical nano apertures and the flexible substrate; and a second dielectric protective layer formed on the underside of the layer for formation of dynamic optical nano apertures to maintain a given distance between the layer for formation of dynamic optical nano apertures and the measured object.