Optical reading device for a pointer instrument
AssigneeSiemens Aktiengesellschaft
InventorsRalf Huck, Stefan Klehr
Life of this patent
Estimating the term…
Abstract
An optical reading device for a pointer instrument which has a pointer and a scale face or dial with different degrees of reflectance in each case, includes an illumination device for illuminating the scale face or dial and a plurality of light sensor elements which are arranged in a circular arc about the rotational axis of the pointer in order to detect the light of the illumination device reflected back by the scale face or dial, wherein the illumination device is configured to uniformly illuminate the scale face or dial and each light sensor element is configured with an isosceles triangle outline, where each light sensor element is offset with respect to one another by half of the base width in the circumferential direction of the circular arc.
Claims8
An optical reading device of a pointer instrument having a pointer and a scale face or dial with different reflection properties, comprising:
- an illumination apparatus for illuminating the scale face or dial of the pointer instrument;
- and
- a plurality of triangular light sensor elements which are arranged in a circle about a rotation axis of the pointer for capturing light of the illumination apparatus reflected back by the scale face or dial of the pointer instrument;
- wherein the illumination apparatus is configured to evenly illuminate the scale face or dial at least in a region opposite the circle;
- and
- wherein the plurality of triangular light sensor elements each substantially formed as isosceles triangles and are each arranged adjacent to one another along a circumferential direction of the circle.
An optical reading device of a pointer instrument having a pointer and a scale face or dial with different reflection properties, comprising:
- an illumination apparatus for illuminating the scale face or dial of the pointer instrument;
- and
- a plurality of triangular light sensor elements which are arranged in a circle about a rotation axis of the pointer for capturing light of the illumination apparatus reflected back by the scale face or dial of the pointer instrument;
- wherein the illumination apparatus is configured to evenly illuminate the scale face or dial at least in a region opposite the circle;
- wherein the plurality of triangular light sensor elements each substantially formed as isosceles triangles and are each arranged adjacent to one another along a circumferential direction of the circle;
- and
- wherein each light sensor element of the plurality of light sensor elements abuts, via limbs of a triangular outline of the light sensor element, another limb or base side of an adjacent light sensor element.
Dependencies are inferred from the claim text.