Optical Filters 2013 - SCHOTT North America

9Filter Densityglass type ρ[g/cm 3 ]Reflectionfactor Pfor λ =587.6 nmRefractiveindex nfor λ =587.6 nmBubbleclassStainresistanceFRAcidresistanceSRAlkaliresistanceARTransformationtemperatureTg [°C]Thermalexpansionα –30/+70°C[10 –6 /K]Thermalexpansionα 20/300°C[10 –6 /K]RG645 2.65 0.92 1.52 3 0 1.0 1.0 519 8.0 9.2 0.16RG665 2.77 0.91 1.54 3 0 1.0 1.0 527 8.1 9.4 0.17RG695 2.76 0.91 1.54 3 0 1.0 1.0 532 8.1 9.4 0.18RG715 2.76 0.91 1.53 3 0 1.0 1.0 532 8.1 9.4 0.18RG780 2.94 0.91 1.56 3 5 53.4 1.3 552 9.5 10.5 0.22RG830 2.94 0.91 1.56 3 5 53.4 1.3 554 9.5 10.5 0.23RG850 2.93 0.91 1.56 3 5 53.4 1.3 554 9.5 10.5 0.24RG1000 2.73 0.91 1.54 3 0 1.0 1.0 476 9.0 10.3 0.41NG1 2.47 0.92 1.52 2 1 2.2 1.0 471 6.6 7.2NG3 2.44 0.92 1.51 2 1 2.2 1.0 462 6.5 7.3NG4 2.43 0.92 1.51 2 1 2.2 1.0 483 6.7 7.2NG5 2.43 0.92 1.50 2 1 3.2 2.0 474 6.6 7.3NG9 2.45 0.92 1.51 2 1 3.2 2.0 470 6.4 7.2NG11 2.42 0.92 1.50 2 1 3.4 2.0 481 6.9 7.5N-WG280 2.51 0.92 1.52 1 0 1.0 2.0 558 7.1 8.4 0.06N-WG295 2.51 0.92 1.52 1 0 1.0 2.0 565 7.2 8.4 0.06N-WG305 2.51 0.92 1.52 1 0 1.0 2.0 562 7.1 8.4 0.06N-WG320 2.51 0.92 1.52 1 0 1.0 2.0 563 7.1 8.4 0.06KG1 2.53 0.92 1.52 3 0 2.0 3.0 599 5.3 6.1KG2 2.52 0.92 1.51 3 0 2.0 3.0 605 5.4 6.3KG3 2.52 0.92 1.51 3 0 2.0 4.0 581 5.3 6.1KG5 2.53 0.92 1.51 3 0 3.0 4.0 565 5.4 6.2TemperatureNotes*coefficientT K [nm/°C]Table 3: Physical and chemical properties (for reference only) (continued)* Long-term changes and solarization properties (see sections 5.5 and 5.6 of the “Descriptions” brochure)