Device for measurement of wall thickness of e.g. cylindrical cross-section plastic bottle, has transmission and receiver units arranged on sides of fluoroscopy region, and evaluating device evaluating signals determined by receiver unit

摘要

The device (1) has measurement units comprising two photodiode units for detection of incident radiation. The photodiode units comprise a collimator and photodiodes. A beam splitter controls the incident radiation of an illumination device e.g. elongated surface emitter and thermal emitter, on the photodiode units. A transmission unit (6) and a receiver unit (7) are arranged on opposed sides of a fluoroscopy region (4) for transporting a plastic container (2). An evaluating device evaluates signals determined by the receiver unit. The beam splitter is a wavelength-independent beam splitter and dichroic beam splitter. The evaluating device is a computer or a data processing apparatus. An independent claim is also included for a method for wall thickness measurement of plastic containers by a transmitted light principle.