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藍(lán)寶石(Al2O3)棱鏡
藍(lán)寶石因其極度的韌性和強(qiáng)度可以很好的應(yīng)用為UV,VIS和NIR光譜波段的光學(xué)窗片材料。
藍(lán)寶石具有多種生長(zhǎng)方式。 Verneuil和Czochralski方法通常用于標(biāo)準(zhǔn)級(jí)藍(lán)寶石材料。更高質(zhì)量的藍(lán)寶石,應(yīng)用于電子基板。它是由Kyropulos生長(zhǎng)制造,可以得到非常高的純度,產(chǎn)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(xué)級(jí)別中遇到很少的困難。 它在紫外線范圍內(nèi),必須注意觀察,因?yàn)閺?/span>140nm到240nm的透射對(duì)雜質(zhì)和間隙空位非常敏感。大片藍(lán)寶石可以通過(guò)色帶生長(zhǎng)制成。 藍(lán)寶石具有輕微的雙折射性,通常的IR窗口通常以隨機(jī)的方式從晶體切割,也有對(duì)于雙折射的特定應(yīng)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(xué)藍(lán)寶石沒(méi)有著色。
*請(qǐng)注意,所有制造商似乎對(duì)熱膨脹的實(shí)際數(shù)字不統(tǒng)一!
詳細(xì)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(diǎn): 2040℃
熱導(dǎo)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(jié)構(gòu): 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(gòu)信息:
產(chǎn)品型號(hào): 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(chǎn)品型號(hào): 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(guān)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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