Title:
ENDOSCOPE DEVICE
Document Type and Number:
Japanese Patent JP3394431
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make a naked eye observation by the white light without reducing the concentration of a marker substance by providing a filter used at irradiating time of the royal purple light and a filter used at irradiating time of the white light for the naked eye observation.
SOLUTION: In an optical path of a light source 1, a rotary filter 8 to select the irradiating light is arranged between an infrared ray filter 6 and a lens 7, and a wing 9 is provided, and filters (8a, b and c) are provided. The rotary filter 8 is connected to a driving device 10, and makes the wing 9 freely rotatable, and an optionally selected filter is arranged in the optical path. The filter 8a is a filter to pass only the royal purple light, and passes the light having a wave length not less than 430nm to 460nm. The filter 8b is a filter to pass the light suitable for a naked eye observation, and passes the light having a wave length of 420nm to 460nm, preferably, about 430nm. The filter 8c is a filter to pass the light to clarify contrast of living body tissue, and passes the royal purple light having a wave length not more than 430nm.
Inventors:
Wolf Zanger
Application Number:
JP27005797A
Publication Date:
April 07, 2003
Filing Date:
October 02, 1997
Export Citation:
Assignee:
Richard Wolf GmbH
International Classes:
A61B1/00; A61B1/06; A61B5/00; G02B23/24; (IPC1-7): A61B1/00; A61B1/06
Domestic Patent References:
| JP6125911A | ||||
| JP2299633A | ||||
| JP4150845A | ||||
| JP6194582A | ||||
| JP7218741A |
Attorney, Agent or Firm:
Hiroshi Takeuchi