Patent ID: 7196844

Claim:
An imaging optical device comprising: a casing ( 2 ); an optical system ( 2 a ) having at least two optical components, the distance of which relative to each other is adjustable for focus setting of the optical system ( 2 a ); an adjusting device ( 5 ), which is coupled with at least one of the two optical components, for regulation of the distance between the two optical components; a detection device ( 11 ) for detecting the position of the optical components relative to one another; a processor ( 16 ) which is in signalling connection with the detection device ( 11 ) for conversion of position data obtained from the detection device ( 11 ) into a focal length of the optical system; an output device ( 17 ) which is in signalling connection with the processor ( 16 ) for readable display of the converted focal length; and an energy-supply device for the detection device ( 11 ), the processor ( 16 ) and the output device ( 17 ); wherein the adjusting device comprises a focusing wheel, the detection device ( 11 ) comprises a potentiometer pickoff which detects the current position of the focusing wheel, and wherein the potentiometer pickoff of the detection device ( 11 ) comprises a wiper ( 10 ) which is rigidly connected to an adjusting bar which is provided with the at least two optical components, and a wiper contact ( 12 ) which is fixed to the casing ( 2 ).