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Patent Searching and Data


Title:
OPTICAL LENS FOR USE IN SURGERY
Document Type and Number:
WIPO Patent Application WO/2020/031502
Kind Code:
A1
Abstract:
This biological tissue observation lens has an integrally provided polarizing filter, is a lens material having a 40% or higher average transmittance in the visible wavelength range 380-780 nm, and contains a specific wave length absorbing pigment such that the ratio of the minimum transmittance in the wavelength region 580-600 nm to the aforementioned average transmittance is 18-50%. Because yellow light in the wavelength region 580-600 nm is cut by only a prescribed ratio, a contrast in particular between orange/red and other colors is perceived strongly, and making it easier to distinguish the boundary between the orange/red color of blood and other colors.

Inventors:
TAMURA SHINZO (JP)
WADA KENZO (JP)
Application Number:
PCT/JP2019/023544
Publication Date:
February 13, 2020
Filing Date:
June 13, 2019
Export Citation:
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Assignee:
TALEX CO LTD (JP)
International Classes:
G02B5/30; A61B1/00; G02B3/00; G02B5/22; G02C7/10; G02C7/12
Domestic Patent References:
WO2014115705A12014-07-31
Foreign References:
JP2012173704A2012-09-10
JP2005279255A2005-10-13
US20060033851A12006-02-16
JPH0493912A1992-03-26
JP2015178002A2015-10-08
Other References:
See also references of EP 3816684A4
Attorney, Agent or Firm:
KAMADA Naoya et al. (JP)
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