High performance optical system enabling extremely dynamic and precise guidance of unmanned flying objects


Laser guidance system

Developed and manufactured by MPS Microsystems based on customer specifications, this lens actuator forms an essential component of a laser guidance system for unmanned flying objects. It enables 2 lens groups to be displaced individually over a total range of 48 mm and makes it possible to focus a laser over a distance of several kilometres.

The main technical difficulty inherent to this actuator lies in meeting very stringent requirements for alignment between the two lens groups (< 10 µm) and in maintaining a very small tilt of the lenses over their entire stroke (lateral deviation < 2 µm).

The key part making it possible to ensure such specifications is a frame machined by milling from an aluminium block, into which the 2 drive systems are fastened. These systems each consist of a Ø16 mm brushless motor and a Ø4 mm ball screw  with an axial play of less than 5 µm. Backlash-free and frictionless sliding of the lens holders is ensured by standard L306 linear ball bearings manufactured by MPS Microsystems.

Characteristics

     

    Length: 80 mm
    Diameter: 50 mm
    Motor drive: 2 Faulhaber 1628 024B motors with IE3/AES-4096 digital absolute encoder
    Co-axiality of lens groups: < 10 µm
    Lateral deviation of lenses: 2 µm
    Temperature: -40°C to +70°C

     

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MPS expertise

The key part making it possible to ensure such specifications is a frame machined by milling from an aluminium block, into which the 2 drive systems are fastened. These systems each comprise a Ø16 mm brushless motor and a Ø4 mm ball screw with axial play less than 5 µm. Backlash-free and frictionless sliding of the lens supports is ensured by standard L306 linear ball bearings manufactured by MPS Microsystems.


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