Welcome to Accusy Photontech, Ltd.



  Infrared Optical Components are specifically designed for use in the IR wavelength range from low-IR to mid-IR to long-IR. Accusy devotes to provide high-end domestic market, high quality and competitive price of infrared materials and infrared assembly products for customers. We can use optical grinding , polishing and diamond turning method to produce different dimension flats, mirror, windows and Lenses.




Accusy can provide infrared optics for kinds of different materials, including:
  • Zinc Selenide(ZnSe)
  • Zinc Sulphide(ZnS), Multi-spectral Zinc Sulphide (Ms ZnS)
  • Germanium(Ge)
  • Silicon(Si)
  • Calcium Fluoride(CaF2)
  • Other material on request. 
Manufacturing Ability:
-Max dimension (mm): 200mm
-Thickness: 0.5~50mm
-Form error: λ/10
-Coating: In-house coating facility for high-durable anti-reflection coating for use in the 3~5 µm,8~12um waveband, Environmental test chamber available
Zinc Selenide(ZnSe)
ZnS has high melting point administered, low thermal expansion coefficient, high hardness, good mechanical strength and wide optical wavelength. The  transmissivity is more than 65% during 2~12um. In addition, ZnS has low
absorption on infrared wavelengths, and can transmit visible light. It’s the best choice to make infrared lens, windows, output coupling mirror and beam expander.
Dimension: 150*150*15mm rectangular blank ;
Customized circular blank;
Forming blank, such as sphere with a radius of curvature blank, prism blank

(Multi-spectral) Zinc Sulphide
Zinc Sulphide has high fracture strength and hardness, it is often used in military field and other harsh environment. This kind of material is often used in 8 ~ 12 um spectrum.
Multi-spectral Zinc Sulphide has high transmission characteristics, suitable for high performance general aperture system, this system can work in quite 
wide wavelength.

Silicon is commonly used as a substrate material for infrared reflectors and windows in 1.5~8um. It is frequently used for laser mirrors because of its high thermal conductivity and low density. Silicon lenses are popular for many applications in IR. They are typically used for imaging applications in the 3~5um region of the spectrum, making them excellent for security and military applications. They can also be used to collimate infrared lasers. 
These lenses are coated with a BBAR coating that provides 98% transmission in the 3~5um spectral range.

Germanium is used widely for lenses and windows in thermal imaging and FLIR applications. The useful transmission range of Germanium windows is from 2 to12um.Germanium is opaque in the visible.
Germanium has the property of thermal runaway, meaning that the Transmission decreases as temperature increases. As such, Ge window should be used at temperatures below 100. Germanium’s high density (5.22g/cm3) should be considered when designing for weight-sensitive systems. 

Calcium Fluoride(CaF2)
Calcium Fluoride are widely used in the windows, lens and prisms from vacuum ultraviolet to infrared spectrum. Its low absorption make it can use in high power laser optics. In general, The polished surface of CaF2 is very stable, can 
be used for many years. In addition, the low refractive index of CaF2 make it can be directly used without antireflection coating.