| 摘要 |
Luminous beams toward a scanning unit (20) are spread out, pass through first lattice structures (24.1,24.2), are reflected by reflectors (26.1,26.2) and pass through second lattice structures before hitting a measurement object (10). The lattice structures are disposed to produce a lens effect on the luminous beams during the passage of the luminous beams through the lattice structures. |
