Optical sensor apparatus for detecting vapor of organic solvent
US5783836A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7776
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor apparatus for detecting a vapor of an organic solvent is characterized by a simple structure which allows easy manufacture, high reliability, low cost, compactness in size, and portability. The optical sensor apparatus has a light source unit which emits light for irradiating a polymer thin film formed on a flat reflecting substrate of a sensing element. Light reflected by the sensing element is detected by a light detecting unit. The light source unit, the sensing element, and the light detecting unit are integrally supported by a housing. The polymer thin film which comes into contact with a vapor of an organic solvent causes a change in the thickness and a reflective index thereof. This change is utilized to detect the existence and/or concentration of a vapor of an organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.