Colored Glass(Cut-off, Absorption,-selective, Neutral color glass)

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.
 

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.

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.

1、What are laser windows?

Laser Protect Windows(Laser protective glass, protective filters or welding protective windows) are used to save for the high cost of laser optics.

2、What are laser windows used for?

These windows are normally used in applications like laser cutting, laser welding machine, they are used for avoiding the high-precision laser optics damage by material splashes.

3、The key features of UNI Optics' Laser Windows

High Transmission

High Damage Threshold

Low Scatter

Low Absorption

Excellent Film Density

Excellent Environmental Stability

Typical Specifications:

Dimension: 4mm-80mm, round or square

Material: BK7, Fused Silica, ZnSe...etc

Surface quality: 10/5

Surface flatness: Lambda/10@632.8nm

Parallelism: 30’’

Roughness: 3A

For lithium battery electrode, copper foil and ceramic separator inspection, PCB & single-layer FPC AOI detection, silicon wafer routine sorting, food packaging & label printing quality control and electronic ceramic substrate inspection.

· Covering a wide working distance range

· Lockable distance and aperture settings

Product information: Custom designs are available upon request.

For Intelligent Transportation Systems (ITS) Applications: Road Surveillance, ANPR/ALPR, Automatic Incident Detection, Traffic Enforcement Systems, Railway/Tunnel Safety Monitoring, etc.

· Excellent edge sharpness and uniform illumination
· Designed to resist strong light interference, adaptable to complex lighting conditions
· High stability and low distortion ensure measurement accuracy

For inspection of lithium battery separators and coated copper & aluminum foils, high-end printing and anti-counterfeit packaging, precision testing of PCBs and 3C electronics, and surface defect detection of metal sheets and coils.

· Developed for 64mm big frame sensor
· Low distortion
· Compatible for 2K, 4K, 8K line scan camera
· Excellent optical performance, uniform imaging of center and edge

Product information: Custom designs are available upon request.