|
|
|
|
B-270
DESCRIPTION
| B-270 is a commercially available material that has excellent optical quality. The material comes in drawn form in a variety of thickness and sheet sizes, and the drawn surfaces can be polished to improve their optical performance. Most sheet sizes are about 35" x 66". Contact us for further information. |
|
AVAILABLE THICKNESSES
|
|||
|
Thickness
|
Tolerance
|
Thickness
|
Tolerance
|
| 0.90 mm | ± 0.10 mm | 1.15 mm | ± 0.15 mm |
| 1.65 mm | ± 0.15 mm | 2.00 mm | ± 0.15 mm |
| 3.00 mm | ± 0.20 mm | 4.00 mm | ± 0.20 mm |
| 6.00 mm | ± 0.30 mm | 8.00 mm | ± 0.30 mm |
| 10.0 mm | ± 0.40 mm | ||
PROPERTIES
| Refractive Index: | nd (λ = 588 nm) = 1.5230 |
| Transmission (estimated at 6 mm thick): |
@ 315 nm 15% | @ 360 nm 87% | @ 500 nm 91.4% |
| @ 340 nm 74% | @ 400 nm 90% | @ 600 nm 91.5% |
| Mechanical and Thermal: |
Density | 2.55 g/cm3 |
| Young's Modulus | E = 71.5 KN/ mm2 | |
|
Thermal Coefficient of Expansion (0-300°C) = 95 x 10-7 K-1
|
||
| Chemical: | Hydrolytic Resistance |
(DIN 12111)
|
Class 3
|
|
Alkali Resistance
|
(DIN 52322)
|
Class 2
|
|
|
Acid Resistance
|
(DIN 12116)
|
Class 2
|
| Electrical: | Dielectric Constant | E = 7 |
| Dielectric Loss Factor | tanδ = 30 x 10-4 |
APPLICATIONS
| Optical substrates, glazing, image-forming optics, electronics, laboratory and coating substrates. |