Illumination system for portable color imager borescope
US4957346A · kind A · utility
61Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Oct 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention involves a lighting system for a portable borescope in which the light is turned on and off at video frequencies and the duration of actuation is controlled in relation to the illumination picked up by the video imager in the distal end of the borescope insertion tube. By turning off the lamp for a significant portion of the duty cycle, a significant amount of power is saved, allowing use of the system in a battery operated borescope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.