PI (Physik Instrumente) L.P. Voice Coil PIFOC Focus Drive for Objectives V-308

Z positioning of objectives with PIFOC A positioning of the sample in the Z direction, i.e. along the optical axis of the objective, is required in many examinations or for microscopy technologies. Alternatively, it is possible to move the objective itself in the Z direction. For this purpose, PI offers solutions named PIFOC. Integrated weight force compensation The product is equipped with a magnetic weight force compensation. This maintains the position of a load of up to 1 kg aligned vertically to the motion axis even if no power is applied. The weight force compensation can be adjusted by the user. PIMag® voice coil motor Voice coil motors are direct drives. In direct drives, the force of the drive element is transmitted directly to the load to be moved without the use of mechanical transmission elements such as coupling, drive screw, or gearhead. Voice coil drives consist of a permanent magnet and a winding body that are located in the air gap of the magnetic field. When current flows through the winding body, it moves in the magnetic field of the permanent magnet. Thanks to their low weight and friction-free drive principle, voice coil drives are particularly suitable for applications that require high dynamics and high velocities at limited travel ranges. High scan frequencies and precision positioning are also possible with these drives, because they are free of the effects of hysteresis. Crossed roller guide with crossed roller guides, the point contact of the balls in ball guides is replaced by line contact of the hardened rollers. Consequently, they are considerably stiffer and need less preload, which reduces friction and allows smoother running. Crossed roller guides are also distinguished by high guiding accuracy and load capacity. Force-guided rolling element cages prevent cage creep. Direct position measuring Position measuring is performed with the highest accuracy directly at the motion platform so that nonlinearity, mechanical play, or elastic deformation have no influence on position measuring. Application fields Microscopy: Multiphoton fluorescence microscopy, deep tissue inspection, digital slide scanning microscopy. Biotechnology: Genome sequencing with the Solexa-Illumina method, Immuno-Assay fluorescence. Medical devices: Scanning laser ophthalmology, automated cell counters/flow cytometers. Biomedical research: Optical & magnetic tweezers. Laser materials processing: Laser micromachining, laser ablation. Semiconductor industry: Semiconductor/wafer inspection.