Transmitted wavefront distortion

(TWD) at 633 nm over an

inspection area of Ø10mm

< 3 λ

< λ/4

Beam deviation

< 20 arc min.

< 1 arc min.

Accuracy of polarization axis
to indicated edge ²⁾

< 0.5°

Acceptance angle ^{3), 4)}

± 20°

Refractive index at 633 nm (RI) ⁵⁾

1.525 ± 0.005

Surface imperfections ⁶⁾

Clear aperture (CA)

90% for parts < 20 x 20 mm²
95% for parts ≥ 20 x 20 mm²

Edge chips ⁷⁾

0.05 mm to 0.2 mm, dependent upon part size
< 0.05 mm on request

Specific weight

2.5 ± 0.1 g/mm³

Coefficient of elasticity E

70 ± 5 kN/mm²

Coefficient of thermal

expansion (CTE)

8.1 ± 0.3 x 10^-6 K^-1 (0-100°C)

Specific heat

1.0 ± 0.1 J/gK

Thermal conductivity

0.94 ± 0.05 W/mK

Laser damage threshold (LDT)

a) Continuous wave (CW)

10 W/cm² continuous block
25 W/cm² continuous pass

1 W/cm² continuous block
5 W/cm² continuous pass

b) Pulsed

12 MW/cm² pulse peak power
(equivalent of about 1 µJ/cm² pulse power density)

1 MW/cm² pulse peak power (equivalent of about 100 nJ/cm² pulse power density)

Operating temperature range

up to +400°C

UV types: -20°C to +80°C
all other: -20°C to +120°C

Thermal cycle

-40°C to +80°C 200 cycles
(DIN EN 60068-2-14 method Na)

Humid storage

85°C, 85% rel. humidity, 1,000 h
According to Telcordia
GR-1221-CORE

UV-stability

UV-stability 20 mW/cm² at 60 h irradiation without any degradation

Chemical resistance

colorPol^® polarizers are insensitive to most organic and cleaning solvents, acids and bases⁸⁾ and distilled water.