1. 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
2. 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.）
3. 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.
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UV Fused Silica
Optical Grade Glass
Colored Glass(Cut-off, Absorption,-selective, Neutral color glass)
UNI Optics supply material include neutral density, short pass, long pass, band pass, ultraviolet, infrared,heat absorbing, and color temperature conversion filters. Just point and click on the name above to view information on that manufacturers filters.
UV Fused Silica
Optical Crystals
Crystal are main applied for laser application. UNI OPTICS offers the following crystal products.
1. Laser Crystals and Rods: YAG crystal, Nd: YVO4 Crystal
2. Nonlinear Crystals: BBO, KTP, LiNbO3, LBO. KDP&DKDP
3. Birefringent Crystals: YVO4, a-BBO, Calcite.
IR Windows Calcium Fluoride CaF2 Windows
Calcium Fluoride windows and lenses for UV and IR spectrum. Custom made CaF2 windows, CaF2 lenses and wedges according to customer's specifications. CaF2 windows up to 220mm diameter; CaF2 wedges, prisms and CaF2 mirrors; Excimer CaF2 optics, Raman grade CaF2 optics and etc.
FA Lens UN-TFA3520X-45MP
For Consumer Electronics Inspection, Semiconductor & PCB Inspection, AOI, Railway Inspection, etc.
· High relative illumination and high contrast
· Low distortion and excellent corner brightness
· High resolution
· Compatible with 4/3" 45MP camera
Product information: Custom designs are available upon request.
M12· Fisheye Lens UN-UW013018C-5MP
FA Lens UN-TFA0828C-6MP
For High-Precision Machine Vision Applications: Consumer Electronics Dimensional Inspection, Surface Defect Detection, OCR & Code Reading, Robotic Guidance, Biomedical Imaging and so on.
· Developed for 2/3" image format
· Low distortion
· High relative illumination
· Focus and iris fixed with screw
Product information: Custom designs are available upon request.
Colored Glass(Cut-off, Absorption,-selective, Neutral color glass)
UNI Optics supply material include neutral density, short pass, long pass, band pass, ultraviolet, infrared,heat absorbing, and color temperature conversion filters. Just point and click on the name above to view information on that manufacturers filters.
Line Scan Lens UN-ALS502K01
For color sorting equipments, textile and non-woven fabric surface testing, flexible packaging & large-format printing quality checking, plastic film and paper web flaw detection, flat glass and building panel surface screening, metal strip preliminary defect inspection, lumber board sorting and agricultural material sorting.
· Developed for 30mm big frame sensor
· Large Aperture, up to F2.8· Excellent optical performance, uniform imaging of center and edge
Product information: Custom designs are available upon request.
Custom Truncated Doublet and Singlet Lenses
We offer an extensive custom truncated doublet lens service. With our 30 year heritage of experience in the industry means we can always find the right product and specification for you, whether you require exotic materials, or exceptionally tight tolerances, we are confident in our ability to supply to your complete satisfaction. The table below is a brief overview of our doublet lens and is not an exhaustive list. If your individual requirements are not met, then please contact our technical sales team who will be happy to advise.es and is n’t an exhaustive list. If your individual requirements are not met, then please contact our technical sales team who will be happy to advise.
Typical Specifications:
Typical materials: Flint (N/F2) and Crown (BK7)
Flint (SF6) and Crown (N-LAK22)
UV & IR materials on request
Diameter: 3mm to 200mm+
Focal length: 3mm to 1000mm+
Centration: < 3 arcseconds
Surface figure: < 0.1 fringe
Surface quality: < 10/5 Scratch/dig
Coating options: Single layer and BBAR coatings for UV/VIS/NIR with R.avg.<0.25%
More information on the achievable specifications for your individual application can be found by contacting our technical sales team.
N-BK7 and Fused Silica Wedge Prisms
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