硅（Si）通过 Czochralski（CZ）提拉生长，由于包含一些氧化物，导致9微米波段有吸收。 为了避免这种情况，可以通过Float-Zone（FZ）提拉生长材料。 光学硅一般是少量掺杂（5至40欧姆厘米）以获得10微米以上的最佳透射率，通常掺杂是硼（P型）和磷（N型）。 掺杂之后，硅具有另一个通带：30至100微米，其仅在非常高电阻率未补偿材料中有效。
CZ硅通常用作1.5-8微米区域的红外反射器和窗口的基板材料。 由于9微米的强吸收带使其不适用于CO2激光传输应用，但由于其高导热性和低密度，它经常用于激光反射镜。
硅材质主要用于加工硅窗口片，硅透镜，应用波段为1.5-7um。硅反射镜用于CO2激光器和光谱仪。
硅窗口片主要规格
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热标签 :
镀增透膜蓝宝石窗片
蓝宝石窗片在高温下保持高强度，具有良好的热性能和卓越的透明度。它在高达1000°C的温度下对常见的酸和碱具有耐化学性，对于低于300°C的氟化氢也具有耐化学性。 这些特性促使其广泛用于需要在从真空紫外线到近红外范围内的进行光传输的恶劣环境中。
N-BK7金属镀膜反射镜
1，优恩立光电提供哪些金属镀膜类型？
优恩立光电主要提供四种镀膜类型，包括：
1）紫外增强铝膜：从250nm到400nm的平均反射率> 85%
2）保护性铝膜：从400nm到800nm的平均反射率> 87%
3）保护性银膜：从400nm到20um的平均反射率> 400%
4）保护性金膜：从650nm到16um的平均反射率> 98%
2，金属镀膜反射镜具有什么特点？
金属涂层镜具有以下特征：
光谱范围广
对入射角和偏振态不敏感
低成本
非耐用品
反射率相对较低
激光损伤阈值低
3，优恩立光电能为您提供什么金属镀膜反射镜？
常用规格：
基底材料：N-BK7，熔融石英，耐热玻璃，浮法玻璃
尺寸公差：+/- 0.1mm
表面质量：60-40
平行度：3'
平整度：λ/ 4 / 25mm @ 633nm
倒角：保护性
一个表面：抛光和金属镀膜
另一个表面：细磨
注：铝是最广泛使用的金属反射膜，从近紫外到近红外，具有高反射率，且成本低。银在可见光和近红外波长下的反射率高于铝膜，但空气中的银会快速氧化，颜色变暗，使薄膜性能和硬度迅速下降。金膜具有良好的一致性，在近、中、远红外范围内具有高反射率，可以有效控制热辐射，但它比较柔软，容易擦伤，应该非常注意清洁，而且成本很高。
红外材料
1. Germanium (Ge)
Germanium (Ge) is the preferred lens and window material for high performance infrared imaging systems in the 8–12 μm wavelength band. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface curvature. Chromatic aberration is small, often eliminating the need for correction.
| Crystallographic properties | |
| Syngony | Cubic |
| Crystal Form | Poly or Single Crystal |
| Lattice Constant | 5.66 |
| Cleavability | <111>, non-perfect |
| Molecular Weight | 72.6 |
| Physical properties | |
| Density, at 20 °C | 5.33 |
| Hardness, Mohs | 6.3 |
| Dielectric Constant for 9.37 × 109 Hz at 300 K | 16.6 |
| Melting | 937 |
| Thermal Conductivity, W/m·K at at 293 K | 59 |
| Thermal Expansion, 1/K at 298 K | 6.1 × 10-6 |
| Specific Heat Capacity, J/(kgK) at 273-373 K | 0.074 |
| Bandgap, eV | 0.67 |
| Knoop Hardness, kg/mm2 | 800 |
| Youngs Modulus, Gpa | 102.66 |
| Shear Modulus, GPa | 67.04 |
| Bulk Modulus, GPa | 77.86 |
| Debye Temperature, K | 370 |
| Poissons Ratio | 0.278 |
| Elastic Coefficient | C11=129, C12=48.3, C44=67.1 |
| Apparent Elastic Limit | 89.6 MPa (13000psi) |
| Chemical properties | |
| Solubility in water | None |
| Solubility in acids | Soluble |
| Molecular Weight | 72.59 |
2. Silicon (Si)
Silicon (Si) is grown by Czochralski pulling techniques (CZ) and contains some oxygen that causes an absorption band at 9 microns.To avoid this, material can be prepared by a Float-Zone (FZ) process. Optical silicon is generally lightly doped (5 to 40 ohm cm) for best transmission above 10 microns, and doping is usually boron (P-type) and phosphorus (N-type). After doping silicon has a further pass band: 30 to 100 microns which is effective only in very high resistivity uncompensated material.
CZ Silicon is commonly used as substrate material for infrared reflectors and windows in the 1.5-8 micron region. The strong absorption band at 9 microns makes it unsuitable for CO2 laser transmission applications, but it is frequently used for laser mirrors because of its high thermal conductivity and low density. Application as window, lens in the 1.5 - 8 um region; Mirror for CO2 laser and spectrometer applications.
Crystallographic properties
Syngony
Cubic
Lattice Constant, A
5.43
Physical properties
Density
2.33g/cm3
Hardness, Mohs
7
Dielectric Constant for 9.37 x 109 Hz
13
Melting point, оС
1414
Thermal Conductivity, W/m·K at 313 K
163
Thermal Expansion, 1/K at 293 K
2.6x10-6
Specific Heat Capacity, J/(kg°C)
712.8
Bandgap, eV
1.1
Knoop Hardness, kg/mm2
1100
Youngs Modulus, Gpa
130.91
Shear Modulus, GPan
79.92
Bulk Modulus, GPa
101.97
Debye Temperature, K
640
Poissons Ratio
0.28
Chemical properties
Solubility in water
None
Molecular Weight
28.09
3、ZnS material:
ZnS MultiSpectral Under intense heat and pressure, defects within the crystalline lattice are virtually eliminated, leaving a water-clear material with minimal scatter and high transmission characteristics from 0.4 to 12 microns. This material is particularly well suited for high-performance common aperture systems that must perform across a broad wavelength spectrum.
Specifications:
Material: ZnS MultiSpectral
Diameter Tolerance: --------------------- +0.0, -0.1mm
Thickness Tolerance: -------------------- ±0.1mm
Clear Aperture: ---------------------------->85%
Parallelism: -----------------------------------3 arc minute
Surface Quality: ----------------------------80-50 scratch and dig
Wavefront Distortion: -------------------- λ /2 per 25mm @633mm
Bevel: -----------------------------------------Protective (<0.2mm x 45° )
Coating: -------------------------------------- Optional （Uncoated, AR Coating, etc.）
4. ZnSe material
ZnSe is a preferred material for lenses, windows, output couplers and beam expanders for its low absorptivity at infrared wavelengths and its visible transmission. For high-power applications, it’s critical that the material bulk absorption and internal defect structure be carefully controlled, that minimum-damage polishing technology be employed, and the highest quality optical thin-film coatings are used. The material absorption is verified by CO2 laser vacuum calorimetry. Our quality assurance department provides testing and specific optics certification on request.
ZnSe is non-hygroscopic and chemically stable, unless treated with strong acids. It’s safe to use in most industrial field, and laboratory environments.
电话 : +86-591-86395085
电子邮件 : sales@uni-optics.com
