■WAS 160 wedge angle sensor
Portable sensor for measuring radius and wedge angle. For measuring the shape of windshields of cars, helicopters, and airplanes.
WAS 160: Portable sensor for radius and wedge angle measurements
■Applications Car, helicopter, airplane windshields
»WAS 160« performs the function of measuring the wedge angle and radius of curvature of a car windshield. In principle, it can also be used for various other transparent objects. Both wedge angle and radius of curvature are common criteria that determine the quality of a windshield. These are especially important if the vehicle is equipped with a head-up display that reflects information from a projector into the driver's field of vision. If the parameters deviate too much from the required values, ghosting or blurred images will occur, rendering the projector useless.
»WAS 160« has been specially developed to measure both parameters with one sensor. The sensor essentially consists of a motorized focusable autocollimator with an image processing system for data acquisition and evaluation.
■Autocollimator
Autocollimators are used to measure wedge angle and radius of curvature. There are many applications where the autocollimation principle has been described and we recommend the relevant literature for more detailed information. Autocollimators usually have a focal point at infinity, so only reflections from flat surfaces are formed as autocollimation images.
When bringing the spherical surface to the autocollimation position, focus on the center of curvature to obtain a reflected image. Focusing is performed by shifting the front lens of the autocollimator objective. In the measuring head, this is achieved by a stepper motor and a spindle with a small upward slope.
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