DOUBLE-CHANNEL SPACE TELESCOPE FOR SIMULTANEOUS OBSERVATION OF EARTH AND STARS (VERSIONS) Russian patent published in 2015 - IPC G02B23/04 G01C21/24 

FIELD: physics, optics.

SUBSTANCE: invention can be used in space equipment for remote probing of the Earth with strict requirements for gridding obtained images. The telescope comprises, arranged in series on the beam path of a first channel, a first main mirror, a secondary mirror, a lens corrector, a recording device mounted in the focal plane of the telescope and, on the beam path of a second channel, a main mirror which is common for the first and second channels, and a second recording device. The channels of the telescope are coaxial with opposite arrangement of entrance pupils. The main mirror is biconcave with formation of two oppositely directed working surfaces and two focal planes of the telescope. In the first version, both focal planes of the telescope and both recording devices are located on the side of the entrance pupil of the second channel. In the second version, each channel is provided with a separate secondary mirror, both focal planes and both recording devices are located in the central area of the main mirror and the recording devices are located on the side of the entrance pupils of corresponding channels.

EFFECT: reduced error in referencing the image of the earth's surface.

2 cl, 2 dwg