The image forming apparatus object with a step change in the visual field

摘要

FIELD: physics.;SUBSTANCE: device has narrow and wide field of vision channels which consist of the following, arranged in series on the axis of a Kepler afocal system which collects luminous flux from the object: a scanning mirror, an optical system for dual transfer of an image from the afocal system into a photosensitive plane and a photodetector with a cooled diaphragm. In the narrow field of vision device, the first component of the Kepler afocal system is formed from a single lens, and the second is formed from two lenses. Each lens of the second component is turned through 180° about an axis perpendicular to the optical axis of the system. In the wide field of vision device, three lenses are further mounted after the first component of the Kepler afocal system with possibility of removal. The optical system for dual transfer of an image from the Kepler afocal system into a photosensitive plane is in the form of a first component consisting of a single lens and, mounted in front of the photodetector, a second component in which two lenses are added for transfer of the image into the photosensitive plane.;EFFECT: increase in aperture ratio without increasing the number of components of the optical system while maintaining image quality.;1 dwg, 6 tbl