Automatic colour control apparatus for test body with bright gold colour surface

摘要

The apparatus measures colour differences between different test bodies. A widened light source with spectral parts in red, green and blue range of the visible spectrum is imaged across the test body as an intermediate imaging element on a detector. The energy current density parts are separated in red, green and blue range, to enable measuring to be carried out. The signals from the detector are evaluated by an evaluation circuit and are indicated. A thermal light source is used. An illuminated diffusing lens as light source is imaged. A colour CCD camera can be used as a detector. A photo sensitive semiconductor with preset spectral filters can be used as a detector.