Patent ID: 7738153

Claim:
A device comprising a scanner comprising: a base member; a scanning beam reflective member having a first tilt axis and a second tilt axis orthogonal to the first tilt axis; a reflective member mounting assembly for mounting the reflective member on the base member for tilting of the reflective member along the first and second tilt axes; an actuator for causing the reflective member mounting assembly to tilt the reflective member along at least on of the first and second tilt axes to provide a tilt orientation; a magnet assembly which generates one or more magnetic fields which are responsive and correlated to the tilt orientation; and a magnetic field sensor assembly for sensing the magnetic fields generated by the magnet assembly to thereby indicate the tilt orientation, wherein the reflective member mounting assembly comprises a reflective member tilt imparting assembly and a reflective member holder assembly connected to the tilt imparting assembly, wherein the reflective member holder assembly comprises a reflective member holder and a reflective member holder shaft connected to the reflective member holder, and wherein the tilt imparting assembly comprises a spring member, a spring holder which holds the spring member, an outer frame which is mounted on the base member, and a tiltable inner ring which receives the reflective member holder shaft, and wherein the spring member connects the outer frame and inner ring to the spring holder, wherein the spring member comprises a first pair of diagonally opposed spring segments which connect the spring holder to the inner ring along a first inner ring tilt axis, and a second pair of diagonally opposed spring segments which connect the spring holder to the outer frame along a second inner ring tilt axis perpendicular to the first inner ring tilt axis, and wherein the first inner ring tilt axis is generally aligned with the first tilt axis of the reflective member, and wherein the second inner ring tilt axis is generally aligned with the second tilt axis of the reflective member, wherein the actuator comprises an outer yoke connected to the reflective member holder shaft, a pair of diagonally opposed first tilt axis motor coils, a pair of diagonally opposed second tilt axis motor coils, an inner yoke connected to the outer yoke and having four outwardly extending poles, one pair of poles being aligned along a first inner yoke axis and extending through the first tilt axis motor coils, the other pair of poles being aligned along a second inner yoke axis and extending through the second tilt axis motor coils, wherein the first tilt axis motor coils are actuated to cause the reflective member to tilt along the first tilt axis of the reflective member, and wherein the second tilt axis motor coils are actuated to cause the reflective member to tilt along the second tilt axis of the reflective member.