Measuring ranges Displacement measurement 2 Fizeau-type measurement method 2 Measurement methods 2 Optical configurations 2 Reference grating 2 Scale grating 2 Sensor head 2 Signal encoding 2 Signal interference 2 Surface encoders 2 Two-axis 2 Z-directional measuring range 2 reference grating 2 scale grating 2 surface encoder 2 Adaptive 1 Constrained optimization 1 Constraint optimization problems 1 Cuckoo Search Algorithm 1 Cuckoo search algorithms 1 Learning algorithms 1 Levy Flight 1 Levy flights 1 Measuring distances 1 Multi dimensional 1 Node location 1 Node-based 1 Sensor network nodes 1 Sensor nodes 1