LENS OF SURVEYING SYSTEM FOR REMOTE SENSING OF EARTH OF HIGH-RESOLUTION VISIBLE AND NEAR-IR RANGES FOR SPACECRAFTS OF MICRO CLASS Russian patent published in 2019 - IPC G02B23/06 G02B17/08 G02B7/183 

FIELD: optics.

SUBSTANCE: lens consists of a main concave mirror, a secondary convex mirror, a three-lens pre-focus corrector of field aberrations, on which a cone-shaped blend, a base plate is installed, on which on one side there is a cylindrical base-tube with a lens corrector of field aberrations inside. On the external surface of the base-tube there is a main mirror, inside the lens there are pins fixed on the base-barrel, on the opposite end of which there is a secondary mirror unit, on the back side of the base plate there is a photodetector unit mounted on the bars. Mirrors, as well as pins, rods and cylindrical base-tube are made of sintered silicon carbide with coefficient of relief of up to 85. Main mirror is fixed by means of a clamping through a plank from the inoperative side of the main mirror by means of fixing guide screws passing through the holes in the main mirror. Length of spokes corresponds to distance between vertices of forming forms of optical surfaces of main and secondary mirrors.

EFFECT: providing high resistance to adjustments and temperature drops and low weight for highly detailed shooting in the visible and near infrared spectral ranges.

1 cl, 2 dwg