Utilizing the lens imaging principle and through the telephoto optical system, the brightness of the light source or object can be measured in a non-contact state.
1) LM-3 has extremely high sensitivity and precision, and is especially suitable for laboratory and verification-level measurements.
2) Excellent photoDetector: Use highly stable photodetection components whose spectral response curve matches the CIE (International Commission on Illumination) curve to ensure high measurement accuracy and stability.
3) Multiple Viewing Angle switching: 2°, 1°, 0.2°, 0.1° multiple Viewing Angle switching. It is suitable for measuring small objects such as indicator lights and instrument panels, as well as large-sized luminous objects such as outdoor LED displays.
4) Wide measurement range: meets brightness measurement as low as 0.001cd/m2 and as high as 4000000cd/m2.
5) 0.4m~infinity measuring distance: Equipped with a large-diameter, high-quality, internationally renowned objective lens from macro to infinity, measurement from close to long distances can be achieved.
6) The LM-2 aiming point photometer is a basic product for the single market, and its measurement accuracy meets the national first-level requirements.
model | LM-3 | LM-2 | ||||
test function | Brightness(Y) | |||||
lens focal length | f=85mm | |||||
Observation field | 8° | |||||
Test distance | 0.4m~infinite (32mm when equipped with close-up lens) | |||||
Measure the field of view | 2° | 1° | 0.2° | 0.1° | 1° | |
Minimum measurement size (0.4m test distance condition) | ~Φ11mm | ~Φ5.6mm | ~Φ1.1mm | ~Φ0.55mm | ~Φ6mm | |
Brightness measurement range cd/m2 (A light source) | 0.0001~10,000 | 0.001~ 40,000 | 0.01~1000,000 | 0.1~4,000,000 | 0.001ï½100,000 | |
Detector spectral mismatch | f1'<3.5% | f1'<5% | ||||
Brightness accuracy (A light source) | ±2.5%±1 word ±2.5%±1digit | ±5% | ||||
Brightness repeatability | 0.2% | 0.5% | ||||
Communication Interface | RS232-C | |||||
powered by | Battery powered or power adapter 12V/2A powered | |||||
application
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