Introduction

• 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 4.7 mm, f/1.0 lens
  • - Use of diffractive-aspheric lens
  • - Ultralight, wide-angle, passively athermalized LWIR lens
• Applications and capabilities
  • - Thermal imaging and thermography

Optical specifications

• Focal length4.7 mm
• Aperture-based f-numberf/1.04
• Waveband8~12 um
• Focus range1 m to infinity
• Distortion< ‐7 % (80x60, 35 um)
• Transmittance(average@waveband)> 95 % (AR coating)
• > 90 % (DLC coating)
• Relative illumination> 96.3%
• Field of view (FOV)

  Sensor array	Pixel size(um)	FOV (deg)
  		H	V	D
  206 x 156	12	30.5	23	38.4
  160 x 120	17	33.6	25.1	42.2
  	12	23.6	17.6	29.5
  80 x 60	35	34.6	25.8	43.5
  	25	24.6	18.4	30.8

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