Optical apparatus with visual axis detecting
US5835797A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Dec 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical apparatus with the visual axis detecting function is comprised of an imaging optical system, visual axis detecting means for detecting to which of a plurality of areas in the field of view of the optical system a visual axis is directed, and focusing means responsive to the output of the visual axis detecting means to detect defocus regarding the area to which the visual axis is directed, and adjust the optical system so as to correct the defocus, the focusing means continuously effecting the detection of the defocus and the adjustment of the optical system when the area to which the visual axis is directed after the correction of the defocus is a moving object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.