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

• 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.

Applications

• 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
  

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

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.

Performance: Modulation Transfer Function in Spatial Frequency Space.

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