The fθ field mirror is a lens used for a two-dimensional laser scanning using a scanning galvanometer or a polyhedral mirror.
1.The constant-speed rotational motion of the mirror of the scanning galvanometer or the like is converted into the constant-speed linear motion of the spot on the focal plane by the distortion effect of the lens.
2.Can provide a relative focus plane, can be vertically illuminated telecentric field mirror.
3.(1064 nm) and higher harmonics (266 nm, 355 nm, 532 nm), and CO2 laser (9.3 to 10.6 μm) with a fθ field mirror.