Measures light transmission of the lenses (lux).
The device uses a calibrated light source which passes through the endoscope to the eye piece which is connected to a camera.
The light intensity is calculated by detecting the visible area and isolating the white pixels. Then the amount of light is calculated from the image.
Multiple shots with various shutter times are used to get histograms that are converted to determine a regression line with Y values. Every scope is measured with the same calculated Y value. The shutter times tells something about the LT.
These values are compared with the photodiode and temperature sensor in the markersphere and corrected if needed.
The camera takes single consecutive images and the system records these at pixel level. Each Pixel has an RGB value in the color spectrum.
The combination of all pixels is converted into a luminance value by an algorithm specifically developed for this task.
The system uses these images to cross-reference the measured value with data known about this brand and type of endoscope in the system.
Based on the measured value and the reference value, a score between 0 and 100% is given.