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IR Lenses

IR Optical Lens

IR Optical LensIR Optics is precise optic component that can cope with IR wavelength & made of special materials used for UV & IR. Our IR Optical Lenses are High-quality spheres for the near, middle and far-infrared range (wavelength range from 3µm to 5µm & 8µm to 12µm) are diamond-turned optics with excellent properties for a very wide range of applications.

  • Materials: Germanium/ Silicon/ ZnSe/ MgF2/ CaF2/ Saphire/ ZnS
  • Shapes: Sphere/ Aspheric/ Plano/ Diffractive
  • Coatings: UV/ NIR/ SWIR/ MWIR/ LWIR/ Reflective/ Protective
Silicon Carbide Lenses

Our Silicon Lenses are High-quality spheres for the near, middle and far-infrared range (wavelength range from 3µm to 5µm & 8µm to 12µm) are diamond-turned optics with excellent properties for a very wide range of applications. Paras Defence has the complete infrastructure for the production of Silicon Lenses with Aspheric, Aspheric Diffractive, as well as Spherical profiles, can be made with utmost accuracy and precision. Material such as Germanium, Calcium Fluoride, Zinc Sulphide and Zinc Selenide are also produced.​

Germanium Lenses

Germanium Lenses Are ideal for use in Mid-Wave Infrared and Long-Wave Infrared applications, including thermal imaging, spectroscopy, or FLIR. Due to thermal runaway, or the decrease in transmission as temperature increases, Germanium Lenses should be used at temperatures below 100°C. Germanium’s high density (5.33 g/cm3) should be considered when designing for weight-sensitive systems.

Zinc Sulphide Lense

Paras Defence supply a range of quality Zinc Sulphide optical components including Zinc Sulphide lenses. Zinc Sulphide (ZnS) is a widely-used IR transmitting material used for windows, lenses and other optical components. The material transmits at about 50% between 0.4 -12μm before dropping off to zero transmission at around 15μm. Its low absorbance in the IR spectrum makes it suitable for CO2 lasers operating at 10.6μm.Zinc Sulphide has a pale yellow appearance and a hardness of HK160. Although the material is resistant to thermal shock, it is not recommended for harsh environments. Zinc Selenide is used in the form of optical windows in FLIR (Forward Looking Infrared) systems, as meniscus, spherical or cylindrical lenses and as resonator windows in CO2 lasers.

Diameter
10 to 200 mm
Diameter Tolerance
± 0.005
Center Thickness Tolerance
± 0.008
Focal Length Tolerance
± 2%
Surface Quality
40:20
Surface Irregularity
1 Fringe @ 633 nm