Research Support Instruments
Infrared Cyrogenic Imaging Optic

Infrared Cryogenic Imaging Optics

Optimized for 8-11.5 micron light


RSI's IR Beam Expander is now for sale.  Features include:RSI IR Cyrogenic Imaging Optics

Germanium and Zinc Selenide optics optimized for 8-11.5 micron wavelength range
• 31 mm Entrance Pupil Diameter located 12 mm in front of lens
• 17-degree full Field Of View
• 18 mm back working distance for your spectral filter, or let RSI provide one to fit your needs.


  • Hyper- & Multi- Spectral Imagers
  • Chemical & Bio-agent detection
  • Target image recognition & analysis
  • Matched to currently available RSI/PSI products:
    • Fabry Perot Wide-Angle Interferometer
    • Infrared Beam Expander


Optical Substrate
Housing Substrate
MTF Performance ≥0.59 at 12.5 lp/mm
AR Coated
Per your specification
Mechanical Envelope
Ф50 mm, 77 mm long
Mechanical Interface

Optical Layout:

IR Cyrogenic Imaging Optics Optical Layout

Near Diffraction-Limited Performance at Cryogenic Temperatures:

  • 87% Encircled energy at Airy disk radial distance from centroid 0.4-milliradians
  • Wavefront error nearly invariant over field
  • Corrected for Spherical and Coma

Performance: Spot Diagram of image rays on image plane.

IR Cyrogenic Imaging Optics PSFs

Performance: Modulation Transfer Function in Spatial Frequency Space.

RSI IR Cyrogenic Imaging Optics Angular Frequency

Contact Mark Boies (Boies "at" for more information and to customize your order.

Research Support Instruments, Inc :: 4325-B Forbes Boulevard :: Lanham, MD 20706
(301) 306-0010 :: (fax) (301) 306-0295

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