Overview
We developed a full suite of infrared lenses, enabling both microscopic and macroscopic temperature measurement. Lenses are manufactured from Germanium, Zinc Selenide, and Zinc Sulfide with anti-reflective coatings for maximum transmission in the long wave infrared region. Each lens is designed for maximum sensitivity, long working distance, and with minimum distortion for clear, precise imaging. We developed a bayonet-style mechanical interface enabling quick lens attachment and removal while maximizing thermal uniformity between the lens and camera body to maintain the high measurement accuracy.
Applications
- Semiconductor device failure analysis
- Circuit board failure analysis
- Microscopic temperature measurement and analysis of materials
Features
Comprehensive Calibration
Each lens is calibrated while installed on the camera, resulting in unsurpassed accuracy and measurement uniformity across the entire field-of-view.
Compatible Lenses
Specifications
Optics
| IS640 Macro Lens PN0120 | IS640 80 Micron Lens PN0119 | IS640 40 Micron Lens PN0117 | IS640 20 Micron Lens PN0116 | IS640 10 Micron Lens PN0653 | IS640 5 Micron Lens PN0118 | |
| Pixel Resolution | Minimum 140 μm resolution (at 100 mm) | 80 µm | 40 µm | 20 µm | 10 µm | 5 µm |
| Focus | Manual | Fixed | Fixed | Fixed | Fixed | Fixed |
| Working Distance | 100 mm to infinity | 69 mm | 27 mm | 31 mm | 20 mm | 19.5 mm |
| Field of View | 89.6 x 67.2 mm minimum | 51.2 x 38.4 mm | 25.6 x 19.2 mm | 12.8 x 9.6 mm | 6.4 x 4.8 mm | 3.2 x 2.4 mm |
| Focal Length | 12 mm | 16.3 mm | 15.2 mm | 36.4 mm | 40.9 mm | 20.6 mm |
| Working F/# | 1.00 | 1.05 | 0.76 | 1.09 | 1.41 | 2.62 |
| Object Space NA | 0.003 | 0.10 | 0.28 | 0.39 | 0.60 | 0.65 |
| Depth of Field | Dependent on working distance | ±900µm | ±120µm | ±40µm | ±25µm | ±15µm |
Measurement
| Calibration Range † | Low range: 10 to 80°C * High range: 10 to 300°C | Low range: 10 to 80°C * High range: 10 to 300°C | Low range: 10 to 60°C * High range: 10 to 250°C | Low range: 10 to 80°C * High range: 10 to 300°C | Low range: 10 to 80°C * High range: 10 to 300°C | 10 to 300°C * |
| Sensitivity (NETD) ‡ | Low range: < 35 mK (60 Hz) High range: < 70 mK (60 Hz) | Low range: < 35 mK (60 Hz) High range: < 70 mK (60 Hz) | Low range: < 25 mK (60 Hz) High range: < 50 mK (60 Hz) | Low range: < 35 mK (60 Hz) High range: < 70 mK (60 Hz) | Low range: < 50 mK (60 Hz) High range: < 90 mK (60 Hz) | < 300 mK |
| Accuracy | Low range: +/-2°C High range: +/-2°C or 2% of reading § | Low range: +/-2°C High range: +/-2°C or 2% of reading § | Non-radiometric (used for lock-in thermography testing) | Low range: ± 2°C High range: ± 2°C or 2% of reading § | Low range: ± 2°C High range: ± 2°C or 2% of reading § | Non-radiometric (designed for lock-in thermography testing and spatial/temporal relative measurements) |
* Sentris low range calibrations are optimized for highest sensitivity and may have reduced calibration range.
† The calibration range stated in the specification indicates the range of black-body temperatures used during calibration. Temperature measurements outside of the stated range may be able to be performed but may not meet the specified measurement accuracy.
‡ Noise Equivalent Temperature Difference (NETD) specifies the smallest temperature difference that can be detected. The value stated is NETD at 60 Hz frame rate. Activating real-time image averaging can improve NETD but will increase the measurement response time.
§ whichever is greater
Optical Magnification Comparison
Optical magnification is calculated by dividing the sensor pixel size (17µm) by the lens image pixel size.
| Image pixel size | Optical Magnification |
| 80µm | 17/80 = 0.2125x |
| 40µm | 17/40 = 0.425x |
| 20µm | 17/20 = 0.85x |
| 10µm | 17/10 = 1.7x |
| 5µm | 17/5 = 3.4x |
Width of a line in micrometers in USAF Resolving Power Test Target 1951
| Group Number | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| Element | |||||||||||||
| 1 | 2000.00 | 1000.00 | 500.00 | 250.00 | 125.00 | 62.50 | 31.25 | 15.63 | 7.81 | 3.91 | 1.95 | 0.98 | |
| 2 | 1781.80 | 890.90 | 445.45 | 222.72 | 111.36 | 55.68 | 27.84 | 13.92 | 6.96 | 3.48 | 1.74 | 0.87 | |
| 3 | 1587.40 | 793.70 | 396.85 | 198.43 | 99.21 | 49.61 | 24.80 | 12.40 | 6.20 | 3.10 | 1.55 | 0.78 | |
| 4 | 1414.21 | 707.11 | 353.55 | 176.78 | 88.39 | 44.19 | 22.10 | 11.05 | 5.52 | 2.76 | 1.38 | 0.69 | |
| 5 | 1259.92 | 629.96 | 314.98 | 157.49 | 78.75 | 39.37 | 19.69 | 9.84 | 4.92 | 2.46 | 1.23 | 0.62 | |
| 6 | 1122.46 | 561.23 | 280.62 | 140.31 | 70.15 | 35.08 | 17.54 | 8.77 | 4.38 | 2.19 | 1.10 | 0.55 |
Figure 1: From left to right: USAF 1951 chart from Macro, 80µm, 40µm, 20µm, 10µm, 5µm lens perspective
Setup, Operation, & Maintenance
Additional product resources are linked under Documents at the bottom of this webpage.
Troubleshooting
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