VN4.012

Molded LWIR Lens FL 4.0mm f/1.2 (Model VN4.012)

VN4.012 product image
  • Precision molded LWIR lenses using chalcogenide glass
    • - High-volume, cost effective manufacturing
    • - Optimized for the 8~12 um wavelength range
  • High performance LWIR lenses
    • - FL 4.0 mm, f/1.2 lens
    • - Use of diffractive-aspheric lens
    • - Ultralight, wide-angle, passively athermalized LWIR lens
  • Suitable for use with qVGA and qqVGA detectors and smaller
  • Applications and capabilities
    • - Thermal imaging and thermography
    • - Automotive vision enhancement

Optical specifications

  • Focal length4.0 mm
  • Aperture-based f-numberf/1.18
  • Maximum image circle8.6 mm
  • Waveband8~12 um
  • Focus range0.1 m to infinity
  • Distortion< |32| % (384x288, 17 um)
  • Transmittance(average@waveband)> 95 % (AR coating)
  • > 90 % (DLC coating)
  • Relative illumination> 70%
  • Field of view (FOV)
    Sensor array Pixel size(um) FOV (deg)
    H V D
    384 x 288 17 90 68.7 112.6
    12 64.9 49 80.1
    320 x 240 17 75.9 57.7 93.5
    12 54.4 41.1 67.4
    160 x 120 25 56.6 42.7 70.1
    17 38.8 29.2 48.3

    Note : Each lens is optimized for a specific detector format represented by bold values.
    This table shows values for other compatible detector formats with nonā€optimal performance.