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Table 1 Performance parameters of selected triangular laser heads (Source: https://www.keyence.co.uk/products/measure/laser-1d/lk-g3000/models/)

From: In situ erosion measurement tools for electric propulsion thrusters: triangular laser head and telemicroscope

Reference distance [mm] Measurement range\(^{(a)}\) [mm] Minimum spot size\(^{(b)}\) [mm] Linearity [mm] Repeatability [μm] Sampling frequency [μs] Dimension [mm3] Weight\(^{(c)}\) [g]
10 ± 1 0.02 ± 0.0003 0.02 20–1000 54 × 73 × 27 90
30 ± 5 0.03 ± 0.0025 0.05 20–1000 85 × 77 × 26 280
80 ± 15 0.07 ± 0.0075 0.2 20–1000 95 × 76 × 36 380
150 ± 40 0.12 ± 0.02 0.5 20–1000 83 × 77 × 34 290
400 ± 100 0.29 ± 0.05 2 20–1000 108 × 86 × 37 380
500 −250 to +500 0.30 ± 0.1 to ± 0.5 2 20–1000 108 × 86 × 37 380
  1. \(^{(a)}\) Given with respect to reference distance. \(^{(b)}\) Given at reference distance. \(^{(c)}\) Including cable.