Patent ID: 7079227

Claim:
Optical assembly to be mounted on a microscope for measuring periodic movements of a microstructure, comprising: a lower field lens ( 1 ) and an upper field lens ( 2 ); an imaging lens system ( 4 ) arranged between the two field lenses ( 1 , 2 ) in a beam path ( 3 ) thereof; a stroboscope lamp ( 6 ) including an LED with an aperture angle θ and with a phosphor surface having a diameter d, which satisfies the relation: d*θ<0.5, wherein d is in mm and θ is in rad; a beam splitter ( 5 ) arranged between the two field lenses ( 1 , 2 ) for coupling light pulses of the stroboscope lamp ( 6 ) into the beam path ( 3 ); wherein the optical assembly in the region of the lower field lens ( 1 ) is adapted to be mounted on a camera mount of the microscope; and wherein the field lenses ( 1 , 2 ) and the imaging lens system ( 4 ) are dimensioned and arranged so that the first object image ( 7 ) at the camera mount of the microscope is imaged from below the lower field lens ( 1 ) to above the upper field lens ( 2 ) onto a second object image ( 8 ); and wherein the optical assembly in the region of the upper field lens ( 2 ) is configured for mounting a camera ( 12 ) to the camera mount of the microscope.