초록 ▼

An incremental position encoder comprising a first member arranged for movement with a second member the movement of which is to be monitored, a plurality of light transmissive or reflective elements of three distinct colors, said elements being arranged in a row on said first member, and the elemen

An incremental position encoder comprising a first member arranged for movement with a second member the movement of which is to be monitored, a plurality of light transmissive or reflective elements of three distinct colors, said elements being arranged in a row on said first member, and the elements being arranged in the row in a repeating sequence of said three colors, a light source directing light to said elements and a color sensitive light detector for receiving light transmitted by, or reflected from said elements, said color sensitive detector being arranged to produce, at any given instant, one of three distinct outputs dependant upon the color of the three available, of the element which is at that instant transmitting or reflecting light from the source to the detector.

대표청구항 ▼

An incremental position encoder comprising a first member arranged for movement with a second member the movement of which is to be monitored, a plurality of light transmissive elements of three distinct colours, said elements being sequentially arranged on said first member in a repeating sequence

An incremental position encoder comprising a first member arranged for movement with a second member the movement of which is to be monitored, a plurality of light transmissive elements of three distinct colours, said elements being sequentially arranged on said first member in a repeating sequence of said three colours, a light source directing light to said elements, a colour sensitive light detector for receiving light transmitted by said elements, said colour sensitive detector being arranged to product, at any given instant, one of three distinct outputs dependent upon the colour of the element which is at that instant transmitting light from the source to the detector, and means for analysing the output from the detector to determine one or more parameters of the movement of said second member.