T E C H N I C A L B A C K G R O U N D 2. IR CORRECTIVE LENS.

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T E C H N I C A L B A C K G R O U N D 2. IR CORRECTIVE LENS

IR Correction T E C H N I C A L B A C K G R O U N D By the reason that the strength of the refraction is directly proportional to the wavelength, the longer infrared beams have a shorter focal point than the visible light beams. Blurry and unsharp pictures when using IR illumination with a normal Lens (NIR Spectrum 700 – 1000 nm) IR Light IR Light Focal Plane Visible Light Focal Plane Visible Light Focus Shift

IR Correction T E C H N I C A L B A C K G R O U N D With LD Glass (= Low Dispersion) and a special coating, IR-Corrected lenses can compensate the different focal points between normal light and IR light. No Focus Shift anymore. Reliable sharp pictures for Day & Night Surveillance !!! IR Light Visible Light Focal Plane

Technical Manual Tamron D/N Lens Performance Lens: Tamron 3.0-8mm IR Wavelength: 900nm

Technical Manual Competitor D/N Lens Performance Lens: Competitor Wavelength: 900nm

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