Light measuring apparatus capable of measuring ambient light and flash light
US5589934A · kind A · utility
9Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Jan 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light measuring apparatus capable of measuring ambient light, flash light from a flash source directly connected to the light measuring apparatus and flash light from a flash source that is remote. A photoelectric sensor can convert the light into electrical signals when an operator starts a light measurement cycle. A flash light emission signal can be generated to a flash source. The computer circuit can process the light signals to determine the specific mode of operation of the light measuring process, and based upon that particular mode of operation to appropriately calculate measurement values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.