High Temperature Midwave Infrared (HMIR) Camera Engine

Camera Systems and Electronics

The High Temperature Midwave Infrared (HMIR) Camera Engine is comprised of a high operating temperature Infrared Focal Plane Array (IRFPA) packaged in an Integrated Dewar Electronics Cooler Assembly (IDECA) with a RICOR K527 Split-Linear or K562S integral stirling cooler (Lens and mounting bracets shown in picture not part of HMIR engine).

With the optional compact low power electronics, and the high operating temperature of the FPA, the lifetime and total power are significantly improved over other technologies like InSb.

Features and Benefits:

  • Lower Size, Weight, Power, (SWaP) and higher
    MTTF than InSb for the same performance
  • Built in Video Processing:
    ◦ Bad pixel replacement
    ◦ Onboard NUC
  • Field Tested Off the Shelf Read Out Integrated Circuit (ROIC)
    ◦ IWR, ITR
    ◦ Up to 120 Hz max frame rate at full frame
    ◦ < 25 mK NEdT at 30 Hz for a 300 K scene

The HMIR camera engine has:

  • HgCdTe sensors operated between 120 K and 150 K
  • 640 x 512 format
  • 15 μm pixel size
  • Total Camera Steady State Power at ambient <8 watts including FPA controller, NUC video processor and cryocooler
  • Compact form factor for improved size and weight
  • Cooler MTTF > 25,000 hours (split linear cooler)


With K527 Cooler.
Performance ParametersExpected Performance
Spectral Band3 – 5.0 μm nominal (0.4 – 5.0 μm if required)
Array Format640 x 512
Pixel Pitch (μm)15
NEDT (for 300 K background)25 mK @ F/4.5
FPA Operating Temperature120 – 150 K
F/#2.5 – 4.5
Pixel Operability (%)99.5 %
Frame Rate (Hz)30 or 60 Hz, 120 Hz max
Ambient Temp Range (°C)–40 to + 70
Integration ModeITR, IWR, snapshot and rolling shutter
Integration Time to Above NEDT~ 17 ms
Size and Weight (with Ricor K562S)
without Electronics
2" (W) x 3" (H) x 4" (L) 350 grams
Size and Weight (with Ricor K527L)
without Electronics
Dewar: 1.3" diameter x 5" length
Cooler: 1.4" diameter x 3.2" length
600 grams total weight
Steady State Power~ 4 W (without cooler control electronics)
Estimated Cooler MTTF (hours)> 25,000 (K527)
> 8,000 (K562S)