METHOD AND DEVICE FOR ILLUMINATING DIAL PLATES AND HANDS Russian patent published in 2017 - IPC G01D13/02 

FIELD: physics.

SUBSTANCE: invention can be used to create uniform illumination of dial scales and hands both in classical mechanical watches from wrist and wall ones to street and tower ones, and in indicating instruments on instrument panels and boards in information-control systems or information display systems in land transport or airspace facilities. The proposed method for illuminating the dial plate and the hands and the device for its implementation comprise a dial palte, one or more hands, a radiation source optically coupled to the dial plate, a protective glass and an axially centered indicating mechanism located on the under-dial plate side with one central shaft and one or more outer shafts, made in the form of thin-walled cylinders of different diameters, successively strung one upon another, to the ends of which, on the dial plate side, the corresponding hands are strung in inverse sequence. A collimator and a scattering mirror, optically connected to each other and forming an optical axis coaxial with the axis of rotation of the dial plate and hands, are introduced along the direction of radiation propagation. The central shaft is made hollow in the form of a thin-walled cylinder, the radiation source and the collimator are located on the sub-dial plate side, and the scattering mirror is located on the dial plate side on the inner side and in the center of the protective glass.

EFFECT: accuracy of reading visual information with the image of any polarity regardless of external lighting from the dial plates.

3 cl, 1 dwg