Birefringence Compensation Film-NIBCOM

Combination of polarizing film and birefringence compensation film.

Outline

By combining polarizing film with biaxial retardation film, we can supply products according to customer rests and specifications.

Structures (Ex.)

Application example for STN-LCD(Transparent type)

Wavelength dispersion characteristics

Wide viewing angle retardation film

The change of phase difference varies depending on the viewing angle and can controlled by controlling the three-dimensional refractive index.

Applicaton viewing angle control of polarizing film by retardation film

Retardation film improves the polarizer's performance beyond the axis.

Comparison of the contrast between "polarizing film" and "polarizing film laminated with retardation film"

Without Retardation Film

With Retardation Film

Measurement method(using retardation film)

Comparison of the transmittance between "polarizing film" and "polarizing film laminated with retardation film"

Viewing angle	G1220DUN	G1220DUN+NRF
θ＝0	0.01%	0.01%
θ＝60°	3.3%	0.5%

[Transmittance under axis crossed(at 550nm)]

Directional angle Φ=45° Viewing angle θ=60°

• About safe handling of an optical material