Method for measuring illuminance of lamp
US8049874B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Oct 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/4247
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring illuminance of a lamp utilizes at least one illuminance meter and a rotary apparatus. The lamp is installed on the rotary apparatus. The lamp emits light and projects onto an irradiation area. A measurement area is defined from within the irradiation area. The measurement area is evenly divided into n sub-measurement areas, wherein n is a natural number. The n sub-measurement areas are centrosymmetric. At least one illuminance meter measuring illuminance of the lamp is disposed on one of the n sub-measurement areas. The rotary apparatus drives the lamp to rotate 360/n° in turn. The single illuminance meter measures illuminance of the lamp in other (n−1) sub-measurement areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.