Miniature optical scanner for a two axis scanning system

Details Miniature optical scanner for a two axis scanning system Miniature optical scanner for a two axis scanning system

G - Physics

02

B

G02B 27/00 (2006.01) G02B 7/00 (2006.01) G02B 7/182 (2006.01) G02B 26/10 (2006.01)

Patent

CA 2203100

A miniature optical scanner (10) includes an electromagnetic drive having stationary magnets (26, 28) and stationary drive coils (22, 24) to minimize the rotational inertia of the scanner and increase the scanner's resonant frequency. The scanner is such that the resonant frequency is manually tunable as well as automatically adjustable to compensate for variables causing frequency drift. The optical scan angle is increased by employing a multiplying mirror with the optical scanner (10). For a two axis scanning system, the multiplying mirror may be formed of a second optical scanner to increase the optical scan angle relative to both of the axes.

Un lecteur optique miniature (10) comprend une commande électromagnétique comportant des aimants fixes (26, 28) ainsi que des bobines d'excitation fixes (22, 24) servant à réduire l'inertie de rotation du lecteur et à augmenter sa fréquence de résonnance. Ce lecteur est conçu de sorte que sa fréquence de résonnance peut être ajustée manuellement et automatiquement, ce qui permet de compenser les variables provoquant des déviations de fréquence. En employant un miroir multiplicateur avec le lecteur optique (10), on peut augmenter l'angle de balayage optique. Pour les systèmes de balayage à deux axes, le miroir multiplicateur peut être constitué d'un second lecteur optique pour augmenter l'angle de balayage optique par rapport aux deux axes.

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