Table 1.
The table compares the specs of the two cameras which are used in the active thermographic non-destructive test of the aerospace grade composites [14,15]. FPA—focal plane array; A/D—analogue to digital; IEC—International Electrotechnical Commission; RMS—root mean square; N/A—not applicable.
| Jenoptik VarioCAM High Resolution | FLIR Phoenix | |
|---|---|---|
| Spectral range | LWIR (7.5–14) μm | MWIR (3–5) μm |
| Pixels | 640 × 480 | 640 × 512 |
| Detector | Uncooled microbolometor FPA | InSb (indium antimonide) FPA |
| Start-up time | <60 s | 10–15 min |
| IR frame rate (full frame) | 50/60 Hz | Up to 90 Hz |
| A/D conversion | 16 bit | 14 bit |
| Power supply | Battery (3 h) | Cabled power supply |
| Vibration resistance in operation | 2 G, IEC 68-2-6 | 6.7 g, RMS random vibe, all 3 axis |
| Size (L × W × H) | (133 × 106 × 110) mm | (190.5 × 111.8 × 132.1) mm |
| Weight | 1.5 kg (completely equipped) | 3.2 kg (excluding lens) |
| Cooling engine | N/A | Stirling closed cycle (~77 K) |
| Noise-equivalent temperature difference (NETD) performance | 70 mK | 25 mK |
| Integration time (electronic shutter speed) | N/A | 9 µs to full frame time |
| Lens | 25-mm lens Field of view = 30° × 23° |
50-mm lens Field of view = 18° × 15° |