Biological fluorescence diagnostic apparatus with distinct pickup cameras
US5772580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Feb 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2469
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A biological fluorescence diagnostic apparatus having a device for irradiating a biological tissue with light which excites the tissue to generate fluorescent light, and a device for taking a fluorescence image of the biological tissue passing through an ocular optical system of an endoscope. The apparatus further has a television camera unit including a television camera for taking an ordinary endoscopic observation image passing through the ocular optical system, and a television camera with an image intensifier for taking a fluorescence observation image passing through the ocular optical system after amplifying the light intensity of the image. An optical path switching system which includes a reflective surface is selectively inserted and withdrawn from the optical path of light passing through the ocular optical system so as to selectively produce ordinary and fluorescence images in the television camera unit. A filter is selectively inserted into and movable out of an illuminating light path of the endoscope in response to detection of the position of the optical path switching system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.