Space camera focusing mechanism

Abstract

The invention provides a space camera focusing mechanism. The focusing mechanism comprises an optical lens barrel, a motor assembly and a focusing cam roller assembly. The motor assembly comprises a motor and a small gear arranged on an output shaft of the motor in a sleeving mode. The focusing cam roller assembly comprises a cam gear, a CMOS bracket, and at least one set of cam roller clamps which is assembled on the CMOS bracket and is used for clamping the cam gear, wherein the cam gear and the CMOS bracket sleeve the optical lens barrel; and the cam gear is engaged with the small gear, andwhen the cam gear rotates, rotation motion of the cam gear is converted into reciprocating linear motion of the CMOS assembly fixed on the CMOS bracket so as to change a distance between a CMOS focalplane of the CMOS assembly and an optical lens group in the optical lens barrel. An outer wall of the optical lens barrel serves as a rotating shaft of the cam gear, axial support is provided for thecam gear, self-lubrication is achieved through a molybdenum disulfide material of a cam roller and a PEEK material of the cam gear, and lubricating grease does not need to be used. Therefore, self-lubricating continuous reciprocating focusing in a vacuum environment can be simply realized.

Description

technical field [0001] The present invention relates to the technical field of optical focusing, and more specifically, to a space camera focusing mechanism. Background technique [0002] During the launch process, the space camera is affected by the loading conditions (shock, vibration, overload, etc.) and the environmental conditions (pressure, temperature, microgravity, etc.) Equipped with focusing mechanism is necessary. The cam focusing mechanism has a simple structure, high precision, and strong shock resistance, and is the most commonly used focusing mechanism for space cameras. [0003] However, the traditional cam focusing mechanism has the following disadvantages: [0004] 1. The cam groove is made on the cylindrical cam, the processing process is relatively difficult, and the accuracy is difficult to guarantee; [0005] 2. It is necessary to set a limit device at the limit position, which cannot realize continuous focusing, and it is easy to get stuck at the li...

AI Technical Summary

Problems solved by technology

[0004] 1. The cam groove is made on the cylindrical cam, the processing process is relatively difficult, and the accuracy is difficult to guarantee;

[0005] 2. It is necessary to set a limit device at the limit position, which cannot realize continuous focusing, and it is easy to get stuck at the limit position;

[0006] 3. It needs to rely on the forward rotation and reverse rotation of the motor to realize the reciprocating linear motion of the focusing mechanism, and the control system is relatively complicated;

[0007] 4. Grease needs to be used, but the grease is easy to volatilize in a vacuum environment, which causes serious wear between the cam roller and the cam, and cold welding occurs

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