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藍寶石(Al2O3)棱鏡
藍寶石因其極度的韌性和強度可以很好的應用為UV,VIS和NIR光譜波段的光學窗片材料。
藍寶石具有多種生長方式。 Verneuil和Czochralski方法通常用于標準級藍寶石材料。更高質量的藍寶石,應用于電子基板。它是由Kyropulos生長制造,可以得到非常高的純度,產品具有優(yōu)良的紫外透射特性。在IR中的使用范圍被限制在約5μm,并且在任何光學級別中遇到很少的困難。 它在紫外線范圍內,必須注意觀察,因為從140nm到240nm的透射對雜質和間隙空位非常敏感。大片藍寶石可以通過色帶生長制成。 藍寶石具有輕微的雙折射性,通常的IR窗口通常以隨機的方式從晶體切割,也有對于雙折射的特定應用,選擇取向。 通常這是光軸與表面平面成90度,稱為“零度”材料。 合成光學藍寶石沒有著色。
*請注意,所有制造商似乎對熱膨脹的實際數(shù)字不統(tǒng)一!
詳細參數(shù):
傳輸范圍: 0.17~5.5μm
折射率: No 1.75449; Ne 1.74663(1.06μm)(1)
反射損耗: 14% at 1.06μm
吸收系數(shù): 0.3×10 -3 cm -1 at 2.4μm (2)
吸收峰: 13.5μm
dn / dT: 13.4×10 -6(0.546μm)(3)
dn /dμ= 0: 1.5μm
密度: 3.97g/cm3
熔點: 2040℃
熱導率: 27.21W m-1K-1 at 300K
熱膨脹: 5.6(para)& 5.0(perp)×10-6 / K *
硬度: Knoop 2000 with 2000g indenter
比熱容量: 763JKg-1K-1(293K)(4)
介電常數(shù): 11.5(para)9.4(perp)at 1MHz
楊氏模量(E): 335GPa
剪切模量(G): 148.1GPa
體積模量(K): 240GPa
彈性系數(shù): C11 = 496 C12 = 164 C13 = 115 C33 = 498 C44 = 148
表觀彈性極限: 300 MPa(45,000 psi)
泊松比: 0.25
溶解度: 98×10-6g / 100g water
分子量: 101.96
類/結構: Trigonal(hex),R3c
折射率:
No = Ordinary Ray Ne = Extraordinary Ray
μm | No | Ne | μm | No | Ne | μm | No | Ne |
0.193 | 1.9288 | 1.9174 | 0.213 | 1.8890 | 1.8784 | 0.222 | 1.8754 | 1.8650 |
0.226 | 1.8702 | 1.8599 | 0.244 | 1.8506 | 1.8407 | 0.248 | 1.8470 | 1.8372 |
0.257 | 1.8393 | 1.8297 | 0.266 | 1.8330 | 1.8236 | 0.280 | 1.8244 | 1.8151 |
0.308 | 1.8110 | 1.8020 | 0.325 | 1.8047 | 1.7958 | 0.337 | 1.8001 | 1.7921 |
0.351 | 1.7969 | 1.7882 | 0.355 | 1.7960 | 1.7883 | 0.442 | 1.7804 | 1.7721 |
0.458 | 1.7784 | 1.7702 | 0.488 | 1.7753 | 1.7671 | 0.515 | 1.7730 | 1.7649 |
0.532 | 1.7717 | 1.7636 | 0.590 | 1.7680 | 1.7600 | 0.633 | 1.7659 | 1.7579 |
0.670 | 1.7643 | 1.7563 | 0.694 | 1.7634 | 1.7554 | 0.755 | 1.7614 | 1.7535 |
0.780 | 1.7607 | 1.7527 | 0.800 | 1.7601 | 1.7522 | 0.820 | 1.7596 | 1.7517 |
0.980 | 1.7561 | 1.7482 | 1.064 | 1.7545 | 1.7466 | 1.320 | 1.7501 | 1.7423 |
1.550 | 1.7462 | 1.7384 | 2.010 | 1.7375 | 1.7297 | 2.249 | 1.7323 | 1.7243 |
2.703 | 1.719 | 1.711 | 2.941 | 1.712 | 1.711 | 3.333 | 1.701 | 1.693 |
3.704 | 1.687 | 1.679 | 4.000 | 1.674 | 1.666 | 4.348 | 1.658 | 1.65 |
4.762 | 1.636 | 1.628 | 5.000 | 1.623 | 1.615 | 5.263 | 1.607 | 1.599 |
訂購信息:
產品型號: SAPPRISM10-60
IR Polished Sapphire (Al2O3) 60° prism
10 x 10 x 10mm 60° equiliateral dispersing prism.
A=B=C=H=10mm
Optic axis random direction.
產品型號: SAPPRISM10-60Z
IR Polished Sapphire (Al2O3) 60° prism
10 x 10 x 10mm 60° equiliateral dispersing prism.
A=B=C=H=10mm
Optic axis perpendicular to triangular faces
關于晶體切割:
Sapphire is slightly birefringent and so for critical optical or mechanical applications, the windows shouldbe specified as 'zero degree', or 'c-cut', meaning that the optical axis of the material should be perpendicular to the plane of thewindow. If unspecified, the component will be of 'random' cut, but its worth noting that this is nearly always 60°to the opticaxis as this is the 'softest' direction for the saw. Note that all sapphire is always single crystal, sub-grains are always avoided inthe cut.
C-plane (0,0,0,1) = Z-cut
A-plane (1,1,-2,0) = Y-cut
M-Plane (1,0,-1,0) = X-cut R-Plane (1,0,-1,0)
Manufacturers seem unable to agree on the thermal expansion coefficient of sapphire,figures from 5.6 to 8.4 x 10-6 K are given. While there may be some variation due to themethod of growth, and certainly due to the axis of cut, this variation is inexplicable.
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