Infrared Optics
Long Wave Infrared (LWIR) thermal imaging camera lenses are integrated lens assemblies operating at 8-12 micron spectral regions, and are often coupled with uncooled infrared FPA detectors/sensors. Compared to MWIR and SWIR thermal lenses, the LWIR thermal camera lenses are the more conventional option for thermal imaging due to their affordable price and the fact that LWIR lenses work well when capturing objects at room temperature. LWIR radiations are also less susceptible to smoke and aerosol and hence are more advantageous than MWIR imagers in contexts like firefighting. However, for users whose prior requirement is long detection and sharp images, LWIR lenses are disadvantaged because for LWIR radiation there is a severe problem of signal attenuation due to long distances or other disrupting factors such as molecules in the air. A set of LWIR lens modules, for the most part, is constituted of multiple (>2) single IR lenses with different surface profiles (e.g. diffractive lens, aspheric lens) made of various LWIR-transmitting materials (e.g Ge, ZnSe, Chalcogenide glass, etc.) with complementary optical properties to compensate the spherical and chromatic aberrations and optimize for the image quality. With excellent detection, recognition, and identification (DRI) capabilities, the LWIR lens assemblies meet the specific requirements for a wide range of industrial, medical, commercial, defense, and homeland security applications.
Hangzhou Shalom EO offers off-the-shelf thermal camera lenses and custom lens modules, hundreds of stocked LWIR lenses, with individual specifications listed are prepared for online purchasing. Shalom EO uses a wide assortment of materials including Germanium, Zinc Selenide, Chalcogenide glass, ZnS, and Gallium Arsenide(GaAs), etc. as LWIR lens substrates, deposited with anti-reflection (AR) coatings or diamond-like carbon(DLC) coatings on the lens front. The LWIR thermal lenses are categorized into six classifications: Athermalized Lenses exhibit high resistance to temperature fluctuations thus shrinking the possibility of defocus at unstable temperatures, and Super Wide Angle and Fisheye Lenses provide broad fields of view, Single FOV Lenses have a certain designated focal length each, thus a fixed FOV, while Dual FOV Lenses have two switchable focal lengths each and hence a double FOV. The Zoom Lenses have continuous variable focal lengths, allowing flexible observation over a wide range of distances and real-time detection. And Microscope IR Lenses are also available.
Shalom EO has established its trustful image as a manufacturer and a worldwide supplier of Infrared thermal imaging lenses over years of dedication. Our lens production line is of cutting-edge techniques under rigorous inspection, including CNC fabrication and single-point diamond turning (SPDT) polishing. The sealings of lens groups are IP67-rated waterproof, and dust-tight. For focal length-variable lens modules, built-in manual and motorized focus mechanisms are incorporated, where compact mechanical architectures for lightweight concerns s could be customized upon request. Other specifications and structures such as pinhole lenses for temperature monitoring in furnaces could all be arranged.
