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 19 mm, f/1.03 lens
  • - Use of diffractive‐aspheric lens
  • - Ultralight, wide‐angle, passively athermalized LWIR lens
• Suitable for use with VGA and qVGA detectors and smaller
• Applications and capabilities
  • - Thermal imaging and thermography
  • - Automotive vision enhancement

Optical specifications

• Focal length19 mm
• Aperture-based f-numberf/1.03
• Maximum image circle8.56 mm
• Waveband8~12 um
• Focus range2.4 m to infinity
• Transmittance(average@waveband)> 95 % (AR coating)
• > 90 % (DLC coating)
• Relative illumination> 85%
• Field of view (FOV)

  Sensor array	Pixel size(um)	FOV (deg)
  		H	V	D
  640 X 480	17	32.4	24.6	40
  	12	23	17.5	28.8
  384 X 288	17	20	15	24.6
  	12	14	10.6	17.5
  320 x 240	17	16.5	12.5	20.6
  	12	11.7	8.8	14.6

  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.