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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。


  • 产品产地:

    中国
  • 航运港口:

    中国福州
  • 交付周期:

    四周
  • 付款:

    银行电汇, 西联付款
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  • 描述


1.什么是非偏振分光棱镜(NPBS)

非偏振分光棱镜是由一对精密高公差直角棱镜和其中一个棱镜斜边上的金属介质膜胶合在一起构成。其低偏振是依赖于金属介质膜层使得S和P偏振光的透射率和反射率彼此之间的误差在5%以内。这意味着它们不会改变入射光的偏振状态。我们提供宽带和单波长消偏振分光棱镜(NPBS)。为了在适当的波长范围内产生最大的透过率,在分光棱镜的每一面都镀增透膜。

2. 非偏振分光棱镜(NPBS)是如何起作用的?

这些分光镜以最小的敏感度分散能量,入射光束和反射光束的偏振态基本相同。宽带消偏振分光棱镜混合镀膜具有一定吸收能力,但偏振灵敏度最低。由于混合镀膜层的金属性质,这些立体分光镜不适用于高功率激光器。

 

产品规格


材质:N-SF2 A级光学玻璃

尺寸公差:+/-0.2mm

平整度:λ/4@633nm

光束公差:最小3弧分

表面质量:60-40 S/D

主透过率:tp>95%,ts<1%

主反射比:Rs>99%,Rp<5%

镀膜:斜边面宽带偏振分光镀膜

所有输入和输出面BBAR镀膜


 
Standard
Wavelength(nm)
450-680, 650-850, 900-1200, 1250-1570, 1500-1610 nm
Size (mm) 3.2x3.2x3.2 5x5x5 10x10x10 12.7x12.7x12.7 15x15x15 20x20x20
Part NO. UBPBS032 UBPBS005 UBPBS010 UBPBS127 UBPBS015 UBPBS020
 
Note: Other sizes, split ratio and coating are available upon request.


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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) 


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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
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Molecular Weight 28.09

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