Objective for use with an X-ray fluoroscopy device has aspherical lens surfaces to reduce its length and thus increase the compactness of the design

摘要

Objective for imaging of an object lying at infinity on an image plane of a receiver with seven lenses and a light strength of 1 to 1.1 or higher without artificial vignetting. The opening shutter lies in front, in the image direction, of a first lens peak and the ratio image diameter to focal width equals 0.3. The other lenses are designed with aspherical surfaces so that the length of the objective can be reduced.