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GB/T 33397-2016Optical functional films - Cellulose triacetate(TAC) film - Determination of retardation (English PDF)

光学功能薄膜三醋酸纤维素酯(TAC)膜相延迟测定方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 30, 2016

Implementation date

July 1, 2017

Scope

GB/T 33397-2016 is the English-translated version of 光学功能薄膜三醋酸纤维素酯(TAC)膜相延迟测定方法.

GB/T 33397-2016 is the Chinese standard "Optical functional films - Cellulose triacetate(TAC) film - Determination of retardation".

Its scope clause reads: This standard specifies the method of measuring the retardation of the cellulose triacetate (TAC) film by rotating photon method, including the determination of the retardation of the surface phase And the thickness of the two parts of the delay.

This standard is applicable to the triacetate cellulose ester (TAC) film produced by the casting process. Its clauses include terms and definitions; test equipment.

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Document preview — GB/T 33397-2016

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

1 Scope
2 terms and definitions
2.1 Strain
2.2 Optical axis azimuthal aperture
2.3 Delay retardation
2.4 Surface retardation
2.5 Thickness retardation
3 test equipment
3.1 micrometer or thickness gauge

1 Scope

This standard specifies the method of measuring the retardation of the cellulose triacetate (TAC) film by rotating photon method, including the determination of the retardation of the surface phase

And the thickness of the two parts of the delay.

This standard is applicable to the triacetate cellulose ester (TAC) film produced by the casting process.

2 terms and definitions

The following terms and definitions apply to this document.

2.1 Strain

The deformation of the unit length is divided into the permanent plastic strain introduced in the manufacturing process and the elastic strain in the presence of stress.

Strain will produce strain birefringence and phase delay.

2.2 Optical axis azimuthal aperture

Twist angle

The sample main strain slows the direction of the slow axis with the sample TD (the direction of the film on the manufacturing equipment is called the MD direction, perpendicular to the direction of the MD Called the TD direction, that is, the transverse direction of the web).

2.3 Delay retardation

Relative delay amount

The distance between the two waves after the light passes through the birefringent material.

2.4 Surface retardation

Due to the anisotropy of the refractive index in the XY direction of the film, the amount of retardation generated.

2.5 Thickness retardation

Rth

The amount of retardation generated due to the anisotropy of the refractive index in the XY direction and the refractive index in the externally externally Z direction.

3 test equipment

3.1 micrometer or thickness gauge

The micrometer or thickness meter to be used shall meet one of the following conditions. Test absolute accuracy >=1µm or relative accuracy >=1%.

......
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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