Polarizing plates grading method

Details Polarizing plates grading method Polarizing plates grading method

2007-07-03

2007-07-03

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

C356S367000, C356S402000

Reexamination Certificate

active

10993255

ABSTRACT:
In a polarizing plate grading method a first measurement range A1is chosen on a polarizing plate. After conducting an initial measurement by putting the polarizing plate under X1° C. for Y1hours, the first measurement range is measured to obtain the maximum chromatic value Z1max(NIT,cd/m), and the minimum chromatic value Z1min. The minimum value is subtracted from the maximum value to obtain the net chromatic difference value W1. The temperature change measurement is conducted by putting the polarizing plate under X2° C. for Y2hours and, then, the recovery measurement is conducted on the polarizing plate by putting the polarizing plate under X3° C. for Y3hours. A first measurement range is measured to obtain the maximum chromatic value Z3maxand the minimum chromatic value Z3min. The minimum chromatic value is subtracted from the maximum chromatic value to obtain the net chromatic difference value W3. The polarizing plate grading index Q is obtained by dividing the value obtained from subtracting the net chromatic difference value W1obtained in the initial measurement from the net chromatic difference value W3obtained in the recovery measurement, by the net chromatic difference value W1so as to grade the polarizing plates.

REFERENCES:
patent: 3811775 (1974-05-01), Abu-saud
patent: 4166871 (1979-09-01), Schuler
patent: 4310242 (1982-01-01), Genco et al.
patent: 6055053 (2000-04-01), Lesniak
patent: 6647162 (2003-11-01), Kim et al.
patent: 2002/0015807 (2002-02-01), Sugino et al.
patent: 2002/0097395 (2002-07-01), Smith et al.
patent: 2005/0237526 (2005-10-01), Yeh et al.

Affiliated with

Also associated with

Rating

Polarizing plates grading method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polarizing plates grading method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarizing plates grading method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3732199