Sample observation device with focusing function
US11150459B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | May 26, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sample observation device includes a light source, an illumination optical system, an observation optical system, a detector, a processor, and a drive controller. The illumination optical system includes a condenser lens and an aperture, and the observation optical system includes an objective lens and a light attenuation member. The light attenuation member and the aperture are conjugate. The aperture includes an aperture region, and the light attenuation member includes a light attenuation region. A size of the aperture region, a position of the aperture region, a size of the light attenuation region, and a position of the light attenuation region are set such that a predetermined state is generated. The processor determines light quantity of light received with the detector. The drive controller changes an interval between a sample and the objective lens on the basis of the light quantity such that the light quantity becomes minimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.