GB/T 33048-2016Polarizing film—Test method of optical retardation (English PDF)
偏振片 光学补偿值的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 13, 2016
Implementation date
May 1, 2017
Scope
GB/T 33048-2016 is the English-translated version of 偏振片 光学补偿值的测定.
GB/T 33048-2016 is the Chinese standard "Polarizing film—Test method of optical retardation". Its scope clause reads: This standard specifies the compensation method for compensating the compensation film for polarizers.
This standard is applicable to the testing of single-layer optical compensation films and also to the compensation values of polarizers with compensating films. Its clauses include terms and definitions.
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Document preview — GB/T 33048-2016
National Standard of the People's Republic of China
- ICS
- 71.080.99
- Classification
- G 15
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 terms and definitions
- 2.1 Compensation value
- 2.2 In-plane compensation value
- 2.3 Thickness compensation value
- 2.4 Ordinary light
1 Scope
This standard specifies the compensation method for compensating the compensation film for polarizers.
This standard is applicable to the testing of single-layer optical compensation films and also to the compensation values of polarizers with compensating films.
2 terms and definitions
The following terms and definitions apply to this document.
2.1 Compensation value
When the light passes through the birefringent material, the two kinds of light superposition caused by the difference between the ordinary light and the unusual light transmission speed
Into the bit difference.
2.2 In-plane compensation value
Re
The phase difference obtained in the plane is compensated.
Re = (nx-ny) d
Where.
nx - the refractive index in the slow axis direction of the plane of the film;
ny - the refractive index in the direction of the fast axis in the plane of the film;
d - the thickness of the film, in nanometers (nm).
2.3 Thickness compensation value
Rth
Thickness direction obtained by the phase difference compensation.
Rth = nx ny
2 -nz
÷ d
Where.
nx - the refractive index in the slow axis direction of the plane of the film;
ny - the refractive index in the direction of the fast axis in the plane of the film;
nz - the refractive index in the film thickness direction;
d - the thickness of the film, in nanometers (nm).
2.4 Ordinary light
o light
Follow the law of refraction.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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