초록 ▼

In a method and apparatus wherein components and/or markings applied to substrates are illuminated with illumination devices and imaged via a camera, adequate contrast between useful and unwanted structures is achieved even in the case of highly disparate optical properties of different materials fo

In a method and apparatus wherein components and/or markings applied to substrates are illuminated with illumination devices and imaged via a camera, adequate contrast between useful and unwanted structures is achieved even in the case of highly disparate optical properties of different materials for the substrates, components and markings by the use of an illumination device composed of a number of illumination units that respectively emit light in spectral ranges different from one another and which are thereby separately varied in intensity. This illumination with variable spectral distribution assures an adequate contrast even given the employment of different materials for the illuminated items.

대표청구항 ▼

[ I claim as my invention:] [6.] An apparatus for optimally illuminating a group of objects having substantially identical object features, comprising:a camera having a field of view;means for placing a first object of a group of objects in said field of view of said camera, said camera obtaining an

[ I claim as my invention:] [6.] An apparatus for optimally illuminating a group of objects having substantially identical object features, comprising:a camera having a field of view;means for placing a first object of a group of objects in said field of view of said camera, said camera obtaining an image of said first object, said first object having an object feature and said object feature being present in said image;means for illuminating said first object while said first object is in the field of view of said camera, with illuminating light formed by emitted light from a plurality of illumination sources, the emitted light from each illumination source having a spectral distribution;a plurality of control devices respectively connected to said illumination sources and controlling said illumination sources by varying parameters of said control devices to vary the spectral distribution of the emitted light from each of said illumination sources until an optimized illumination of said first object by said illuminating light is achieved at which said object feature is reliably recognizable in said image;means for storing said parameters which produce an optimized illumination of said first object as stored parameters; andmeans for setting said control devices with said stored parameters for illuminating all other objects in said group.