Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate
2007-10-02
2007-10-02
Lee, Hwa (Andrew) (Department: 2886)
Optics: measuring and testing
By light interference
For dimensional measurement
Reexamination Certificate
active
10515123
ABSTRACT:
A method for simultaneous measuring a thickness of a liquid crystal layer and an average refractive index of the said liquid crystal in sealed liquid crystal cell is disclosed. The method is based on analysis of spectral positions of maxima and minima of interference oscillations, their magnitudes and their envelope in the spectrum of light mirrored by the liquid crystal cell at several different angles-of-incidence. The method is applicable to cells filled with different liquid crystals including cholesterics and smectics.
REFERENCES:
patent: 5034617 (1991-07-01), Isobe
patent: 5502564 (1996-03-01), Ledger
patent: 5889592 (1999-03-01), Zawaideh
patent: 5943134 (1999-08-01), Yamaguchi et al.
patent: 5966195 (1999-10-01), Sato et al.
patent: 6081337 (2000-06-01), Kwok et al.
patent: 6545763 (2003-04-01), Kim et al.
patent: 2004/0257567 (2004-12-01), Woollam et al.
patent: 2152588 (2000-07-01), None
patent: WO 00/43829 (2000-07-01), None
Kucynski & Stryla;Interference Method for the Determination of Refractive Indices and Birefringence of Liquid Crystals; Mol. Cryst. Liq. Cryst., Gordon & Breach Science Publishers; 1975; vol. 31, pp. 267-273; Printed in Holland.
Skarp Kent
Slobodyanyuk Oleksandr
Valyukh Sergiy
Creighton Wray James
Hyra Clifford D.
Lee Hwa (Andrew)
Swedish LCD Center
Valyukh Sergiy
LandOfFree
Method of characterization of liquid crystal cell does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of characterization of liquid crystal cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of characterization of liquid crystal cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3890543