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融石英

融石英由硅和氧的化学结合形成。 熔融石英是一种完美的光学材料,因为它具有良好的紫外和红外透射率,低热膨胀系数。 它具有高稳定性,耐大温度偏移,宽温度工作范围和高激光损伤阈值的热冲击。
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  • 描述
Fused Silica is formed by chemical combination of silicon and oxygen. Fused Silica is perfect optical material due to its good UV and IR transmission, low coefficient of thermal expansion. It has high stability and resistance to thermal shock over large temperature excursions, wide temperature operating range and high laser damage threshold.
 
Properties
Density 2.20g/cm3
Abbe Constant 67.6
Refractive Index (nd) at 588nm 1.4586
Wavelength
(um)
Refractive
 Index (n)
Wavelength
(um)
Refractive
Index (n)
0.2 1.55051 1 1.45042
0.22 1.52845 1.064 1.44962
0.25 1.50745 1.1 1.4492
0.3 1.48779 1.2 1.44805
0.32 1.48274 1.3 1.44692
0.36 1.47529 1.5 1.44462
0.4 1.47012 1.6 1.44342
0.45 1.46557 1.7 1.44217
0.488 1.46302 1.8 1.44087
0.5 1.46233 1.9 1.43951
0.55 1.46008 2 1.43809
0.588 1.4586 2.2 1.43501
0.6 1.45804 2.4 1.43163
0.633 1.45702 2.6 1.42789
0.65 1.45653 2.8 1.42377
0.7 1.45529 3 1.41925
0.75 1.45424 3.2 1.41427
0.8 1.45332 3.37 1.4099
0.85 1.4525 3.507 1.40566
0.9 1.45175 3.707 1.39936
 

There are different types Fused Silica according the different application. In China, there are mainly three types, i.e. JGS1, JGS2, JGS3.Below are the application and their equivalent to other Fused Silica supplier.


JGS1


UV grade Fused Silica: (JGS1) is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in thf orientation and temperature instability inherent in the crystalline form. Fused silica is used for both transmissive at ultraviolet. Transmission and homogeneity exceed those of crystalline quartz without the problems on reflective optics, especially where high laser damage threshold is required. JGS1 is transparent in the ultraviolet and visible regions, and has no absorption bands in the 170-250 nm wavelength intervals. It has an intensive OH absorption band in the interval of wavelength 2600-2800 nm.  


JGS1 is used for optics operating in the deep UV and the visible wavelength range (Laser Lenses, Windows, Prisms, Mirrors, etc.). It is practically free of bubbles and inclusions.



JGS2


Optical Grade Fused Quartz (JGS2) provides good UV and visible transmission. It has almost the same physical and chemical properties with JGS1. However only in thin & small sheet pieces, JGS2 is virtually bubble-free. Elements built from larger pieces will most likely contain bubbles, so application should not be sensitive to these inclusions. But in cases where simple light gathering and strong mechanical properties are the primary goals, JGS2 grade provides excellent performance at a low price.  Ideal Applications for JGS2:  


● Condenser optics not concerned with scatter or distortion
● High temperature and pressure applications
● Optical flats, microscope slides and sight glasses


JGS3


JGS3:equivalent to Suprasil 300 (Heraeus). JGS3 is transparent in the ultraviolet, visible and infrared spectral regions, without considerable absorption bands in the 185-250 nm spectral region.

 

Hardness 5.5 - 6.5 Mohs Scale 570 KHN 100 
Design Tensile Strength 4.8x107 Pa (N/mm2) (7000 psi) 
Design Compressive Strength Greater than 1.1x109 Pa (160,000 psi) 
Bulk Modulus 3.7x1010 Pa (5.3x106 psi) 
Rigidity Modulus 3.1x1010 Pa (4.5x106 psi) 
Youngs Modulus 7.2x10-10 Pa (10.5x106 psi) 
Poissons Ratio 0.17 
Coefficient of Thermal Expansion 5.5x10-7cm/cm.°C (20°C-320°C) 
Thermal Conductivity 1.4 W/m.°C 
Specific Heat 670 J/kg.°C 
Softening Point 1683°C 
Annealing Point 1215°C 
Strain Point 1120°C 
Electrical Receptivity 7x107 ohm.cm (350°C) 
Dielectric Properties (20°C and 1 MHz)
Constant 3.75
Strength 5x107 V/m
Loss Factor Less than 4x10-4
Dissipation Factor Less than 1x10-4 
Velocity of Sound-Shear Wave 3.75x103 m/s 
Velocity of Sound/Compression Wave 5.90x103 m/s 
Sonic Attenuation Less than 11 db/m MHz 
Permeability Constants (cm3mm/cm2 sec cm of Hg) (700°C)
Helium 210x10-10
Hydrogen 21x10-10
Deuterium 17x10-10
Neon 9.5x10-17
Chemical Stability (except hydrofluoric) High resistance to water and acids 


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Optical color less glass
光学玻璃
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Colored Glass Substrates
有色玻璃(截至型,选择吸收型,中性密度型)

UNI Optics供应材料包括中性密度,短程,长通,带通,紫外线,红外线,吸热和色温转换滤光片。

IR Optics material
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.



Laser Crystal
激光晶体

晶体最适用于激光应用。 UNI OPTICS提供以下晶体产品。

1.激光晶体和棒:YAG晶体,Nd:YVO4晶体
2.非线性晶体:BBO,KTP,LiNbO3,LBO。KDP&DKDP
3.双折射晶体:YVO4,a-BBO,方解石。


装配的带通滤光片
机器视觉带通滤光片


带通滤光片是一种通过一定范围内的频率并拒绝(衰减)该范围之外频率的装置,它用于选择性地传输一部分光谱,同时拒绝所有其他波长


强脉冲滤光片
IPL滤光片

IPL滤光片是IPL(强脉冲光)机器的关键光学元件,可阻挡紫外波,并为激光设备传输400nm1200nm的有用波,如光子嫩肤脱毛血管和痤疮治疗皮肤再生


分光五角棱镜
镀氟化钙的分光五角棱镜

分光五角棱镜是通过在棱镜其中一个倾斜面上添加一个楔,并加上部分反射涂层,可以将五角棱镜用作分光镜,透过率/反射率(T/R)比为50/50,其他比例的分光五角棱镜也能根据您的要求定制。

镀金属膜反射镜
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。




平凸圆柱形透镜
光学玻璃平凸圆柱形透镜

平凸圆形柱面镜可用于各种应用中的线性成像或单轴放大。可以与其他镜头组合以形成复杂的成像系统。

可见光镀增透消色差透镜
宽带增透膜消色差透镜

消色差透镜用来减小或消除色差。消色差透镜设计亦有助于减少球面像差。消色差透镜是一系列应用的理想选择,包括荧光显微镜、图像中继、检测或光谱学。消色差透镜通常是将两个元件胶合在一起或将两个元件安装在一个机械件中,它所产生的光斑尺寸比类似的单透镜要小。


红外硅窗口片
硅窗口片
硅主要用作3至5微米波段的光学窗口片,并用作生产光学滤波器和窗口片的子系统。
非偏振分光棱镜(NPBS)
非偏振分光棱镜(NPBS)

非偏振分光棱镜(NPBS)也称为NPBS立体分光镜,是一种更复杂的类型,由两个直角棱镜组成,它们在斜边面处被固定一起。一个棱镜的胶合面有镀膜,在胶合之前,镀有所需反射性能的金属介质膜,具有特定的反射百分比和颜色。镀膜吸收损耗最小,透过率与反射率可设为10%、20%、30%、40%、50%等。


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