Optical system including liquid crystal devices
US5097352A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1989 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Sep 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1347
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An objective optical system is provided with at least one liquid crystal lens whose polarizing characteristic selected in a direction such that polarizing components of light reflected from the lens are counterbalanced and a variable liquid crystal stop is arranged at an angle with respect to an optical axis so that an incident direction of light is deviated to the side on which contrast between transmission and blocked states of light is maximized. The objective optical system enables the balance of the polarizing components to bring about a proper image for observation, can moderate asymmetry, relative to the optical axis, of the contract between the transmission and blocked states of light of the liquid crystal stop, and can secure an adjustable object image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.