The next generation 3D vision system for measuring the individual parameters of spectacle wearers

The ImpressionIST®3 is the third generation of the video centering systems developed by Rodenstock. This device uses a 3D stereo vision system for measuring the individual parameters of spectacle wearers for optimizing the individual lens designs. These parameters are especially important for progressive spectacle lenses generated with free form technology. The new generation implements an optimized software algorithm for an automated recognition of the correspondent points in the two images. Therefore the 3D information is more accurate and can be retrieved much faster. Another big advantage is the specially developed WLAN based dual head camera system, which enables the separation of the measurement system and the evaluation system. This feature allows a slim mechanical setup in three different shapes to fulfill the cost and space saving needs of the optometrist. The new cameras have a larger depth of field and a bigger field of view compared to the preceding generations, which leads to an easier and more flexible positioning of the person under test. An optimized camera orientation leads to images with a better cosmetic impression of the spectacle frame suitable for consulting.