Infrared-transmissive lens and human body detecting sensor using the same
US5315434A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | May 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An infrared-transmissive lens formed by using glass including germanium and selenium or germanium and sulfur as main components and a human body detecting device including the lens and a pyroelectric infrared sensor are disclosed. With this configuration, glass having excellent transmissivity of infrared rays, no poisonous characteristic and difficulty to be crystallized is obtained and the glass is subjected to thermal pressing work to form a lens. The lens and a pyroelectric infrared sensor are combined to obtain a scanning type human body detecting sensor device. Further, the scanning type human body detecting sensor device can be used to detect a plurality of human bodies simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.