Sencore ColorPro III and ColorPro IV - Video Calibration Measurement Sensors

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Sencore ColorPro III and ColorPro IV -  Video Calibration Measurement Sensors
ColorPro III
The ColorPro III sensor, the thinner sensor with a milk-white diffuser glass, should be used to measure all front-projectors (e.g. CRT, LCD, DLP, D-ILA), rear-project (e.g. CRT, LCD, DLP), and direct-view displays (e.g. CRT, Plasma) - but not LCD flat panel displays.
ColorPro IV
The ColorPro IV sensor, the thicker sensor with four light tubes, should be used to measure all LCD flat panel displays. The restricted light acceptance angle of the ColorPro IV sensor, due to the light tubes leading back to the color sensors, allows the sensor to properly integrate the light emitted from a LCD flat panel. Since an LCD flat panel produces light with a restricted emission angle (similar to an automotive headlight), a sensor with a wide angle integrating diffuser cannot accurately integrate the panel's luminance output. Plus, the chromaticity readings will be inaccurate with a wide angle sensor. The ColorPro IV sensor reads luminance and chromaticity accurately for all LCD flat panel displays.