Infrared Silicon(Si) Lens

Silicon (Si) is one of the hardest minerals and optical materials available for use in the NIR (1µm) to about 6µm. Optical quality Silicon is usually doped (5 to 40 ohm cm) to prevent absorption bands within the transmission waveband. Silicon has a lower refractive index than germanium and has a lower density that makes for less weighty optical designs.

Silicon is ideal for use as windows in the 3 to 5µm (MWIR) waveband and as substrate for optical filters. This waveband (3 to 5µm) is important for the detection of sources radiating at a black body temperature of 700K, such as the muzzle flash from guns, such as sniper rifles and mortar pieces. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure all components meet our high quality standards. Its transmission is about 50% within the 1 to 6µm and above 50µm, which will mean that anti-reflection coatings are required to improve the transmission.

Optical Specifications of Silicon Lens

Transmittance of Antireflection coatings:

Silicon properties:

Infrared Elements Selection Guide

Company profile

Wuhan Siwer Optics is a professional manufacturer of various optical components.We focuses on production of optical interference filters,infrared and visible optical components.
The company has optical optimization design, precision optical processing and optical coating technology and production technology, with complete production processing and testing equipment, perfect quality management system.
With continuous technological progress and management innovation, we will create more value and provide better products and services for our customers.

Product Range

Discover the range of standard optical components,including interference filters,optical lenses,prisms,laser windows,dielectric and metallic mirors.We can supply quick interference filters purchase and delivery from our stock,design and manufacture custom optical elements from a wide range of optical materials with vacuum coatings.

Infrared and visible optical prisms,lenses,windows
Material:Germanium,Silicon,ZnSe,ZnS,CaF2,MgF2,Sapphire,Visible optical glass,etc.

Interference filters:bandpass filters,shortpass filters,longpass filters.

Our filters are widely used in: driverless, UAV, optical fiber communication, industrial laser, automation equipment, semiconductor production, micro measurement system, building surveying and mapping, biometrics, medical instruments and devices, security monitoring, beauty instruments, stage lighting, high-energy laser equipment, military equipment, infrared imaging, visual light source, biochemical analyzer, enzyme marker, fingerprint identification, rainbow Membrane recognition, micro projection and imaging systems.

Optical coatings:Infrared Anti-Reflective Coating,Partial Reflective Coating, High Reflective Coating, Polarization Beamsplitter Coating, Dichroic Coating.

Our products are widely used in Precision Instruments,Beauty Equipments,Medical Equipments,Infrared Imaging,Measurement Systems,Laser Processing Equipments,and Scientific area.