Inspection illuminator
US6533429B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2002 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an inspection illuminator capable of reliably detecting defects on the inspection face of articles to be inspected, while making the brightness of light uniform. In this inspection illuminator, a plurality of illuminant rows are provided, in each of which a multiplicity of illuminants 4 are circularly aligned so as to encircle an opening 1K formed approximately in the center; a plurality of annular transparent bodies 6 for dispersing light from the illuminants of the illuminant rows and guiding such light toward the central axis side of the opening 1K are layered in front of such illuminant rows in a state of being optically shielded with shielding means 7; and the light emitting faces 6A of the transparent bodies 6 are formed into an incline plane such that the upper part thereof is closer to the central axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.