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IRG 24

IRG 24

IRG 24在SWIR,MWIR和LWIR波段具有出色的透射率,并且是IR系列中dn / dT最低的。

低dn / dT和低色散等物理特性,使光学工程师可以设计出没有热散焦效应的颜色校正光学系统。

此外,IRG 24可以通过常规的研磨和抛光,单点金刚石车削或精密模压方式加工,以支持从小批量到大批量的零件制造。

IR characteristics
成分 Ge10As40Se50
密度 4.47 g/cm3
热膨胀系数(20°C-100°C) 20.0·10-6/K
转变温度 225°C
热变化 dn/dT (1 µm) 45.9·10-6/K
热变化 dn/dT (5 µm) 21.1·10-6/K
热变化 dn/dT (10 µm) 20.3·10-6/K
折射率(10um) 2.6090
表面质量 60/40双面抛光
表面平整度 P-V ≤ 5个波长@632.8nm
倒边 安全倒边
玻璃类型
物品编号 直径
厚度
重量
Wavelength
[µm]
Transmission
(10 mm)
Transmission
(2 mm)
Extinction
[cm-1]
0.8 52.2 87.8 0.650
1.0 91.4 98.2 0.090
1.5 96.7 99.3 0.034
2.0 97.5 99.5 0.026
2.5 97.5 99.5 0.025
3.0 98.3 99.7 0.017
3.5 98.5 99.7 0.015
4.0 98.7 99.7 0.013
4.5 96.3 99.3 0.037
5.0 97.0 99.4 0.031
5.5 99.5 99.9 0.005
6.0 99.7 99.9 0.003
6.5 99.7 99.9 0.003
7.0 99.7 99.9 0.003
7.5 99.2 99.8 0.008
8.0 95.2 99.0 0.049
Wavelength
[µm]
Transmission
(10 mm)
Transmission
(2 mm)
Extinction
[cm-1]
8.5 98.5 99.7 0.015
9.0 98.8 99.8 0.012
9.5 98.7 99.7 0.013
10.0 98.8 99.8 0.012
10.5 97.8 99.6 0.022
11.0 93.7 98.7 0.065
11.5 78.0 95.2 0.248
12.0 40.2 83.4 0.910
12.5 15.8 69.2 1.844
13.0 16.9 70.1 1.779
13.5 43.0 84.4 0.845
14.0 65.2 91.8 0.428
14.5 70.3 93.2 0.353
15.0 64.3 91.5 0.442
15.5 49.9 87.0 0.696
色散公示常数
B1 2.8965
B2 2.9567
B3 0.9461
C1 0.0000
C2 0.1620
C3 1,939.1000
D0 1.80·10-5
E0 2.10·10-5
λTK 1.67·10-3
Calculation Formula: Refractive index as a function of wavelength and temperature
Wavelength
[µm]
折射率
(@ 22 °C)
Δn abs/ΔT [10–6/K]
22 °C
0.8 2.8028 0.0
0.9 2.7555 0.0
1.0 2.7555 46.0
1.5 2.7249 31.3
2.0 2.6612 26.3
3.0 2.6274 22.9
4.0 2.6222 21.7
5.0 2.6192 21.1
6.0 2.6170 20.8
7.0 2.6151 20.6
8.0 2.6132 20.5
9.0 2.6111 20.4
10.0 2.6090 20.3
11.0 2.6066 20.2
12.0 2.6040 20.2
Wavelength
[µm]
热变化
[dn/dt]
1 µm 45.9·10-6/K
5 µm 21.1·10-6/K
10 µm 20.3·10-6/K