Optical fiber coating method and apparatus therefor
US5976611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C25/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to an optical fiber coating method and an apparatus therefor which can form high quality coating layer on an optical fiber (12) by preventing non-concentricity of a coating resin (14) applied on the optical fiber (12) and admixing of bubble. The optical fiber coating apparatus according to the present invention includes at least one pair of an illumination light introducing window (39) and an optical fiber monitoring window (40) formed facing each other with the resin pool between in a side wall portion of a die holder (17), opposing a resin pool (27), a light source (41) opposing to the illumination light introducing window (39) and projecting an illumination light toward the center portion of the resin pool (27), an image pick-up device (42) opposing the optical fiber monitoring window (40) for monitoring at least a contact portion between the optical fiber (12) and the coating resin (14) and in the vicinity thereof, and coating condition modifying means for modifying a coating condition of the coating resin (14) with respect to the optical fiber (12) on the basis of the result of observation of the image pick-up device (42).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.