optics - cut_off_type_Infrared

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Infrared Glass (Cut-off Type)

Product Description:

The transmission wavelength limit (λ_tj) is defined as a wavelength which corresponds to 50% of the maximum transmissivity on the spectral transmission curve with a glass thickness of 2mm.

The slope of absorption curve is represented as the differece betweeen optical density D(λ_{tj^{-20) and D(λ}}_tj) with a glass thickness of 3mm.

Figure 1: A typical Cut-off Type Infrared Glass Transmittance Curve

Glass Characteristic :

Type	Thickness (mm)	n_d	αX10^-7 (/°C)	T_g(°C)	T_s(°C)	λ_tj (nm) (Tλ_tj=50%)	λ₀ (nm)	Tλ₀ (%)	K
HWB760	3	1.532	111	497	534	760±10	850	≥83.6	≥0.6
HWB780	3	1.532	111	497	534	780±10	900	≥83.6	≥0.5
HWB800	3	1.520	98	527	559	800±10	900	≥83.6	≥0.5
HWB830	3	1.520	98	527	559	830±10	930	≥83.6	≥0.5
HWB850	3	1.520	98	527	559	850±10	950	≥80.0	≥0.5
HWB900	6					900±15	1050	≥80.0	≥0.2
HWB930	6					930±15	1050	≥80.0	≥0.2