Optical: systems and elements – Image stabilization – By movable refractive structure
Patent
1989-04-21
1992-06-16
Arnold, Bruce Y.
Optical: systems and elements
Image stabilization
By movable refractive structure
359554, G02B 2764
Patent
active
051229080
ABSTRACT:
A stabilizing controller system is disclosed for passive inertial stabilizers having case mounted optics moving in combination with inertially suspended optics to stabilize images against accidental angular motion. The controller system utilizes second terms to resolve the conflict between weak coupling for good stabilization and strong coupling for good panning. The controller system, applicable to either the preferred pendulum type or to gyro stabilized systems, includes the use of non-linear functions for both first and second order restoring forces. A relationship utilizing the critical damping function is disclosed between applicable first and second order controller functions and their applicable constants to enable uniform controller system response. Examples of the controller function are applied to an inertial pendulum stabilizer and a gyroscope stabilizer. The inertial pendulum stabilizer is illustrated in a polar displacement and restoration embodiment and a preferred gimbaled displacement and restoration embodiment. Functions are set forth for non-coincidence of sensors and torque motors on the gimbal axes. There results a controller function imposed on the inertial stabilizer from the case which imparts substantially linear forces of correction for pendulum excursion adjacent the line of sight. Non-linear and increasing forces are applied for movement outside of the linear range. Improved panning results.
REFERENCES:
patent: 3756686 (1973-09-01), Humphrey
patent: 3892467 (1975-07-01), Shin
patent: 4013339 (1977-03-01), Ando et al.
patent: 4123164 (1978-10-01), Tambor
patent: 4315610 (1982-02-01), Malueg
patent: 4387971 (1983-06-01), Grove et al.
patent: 4393597 (1983-07-01), Picard et al.
patent: 4623930 (1986-11-01), Ohima et al.
patent: 4911541 (1990-03-01), Alvarez et al.
patent: 4911541 (1990-03-01), Alvarez et al.
Arnold Bruce Y.
Nguyen Thong
Tinsley Laboratories, Inc.
LandOfFree
Non-linear controller functions for inertial optical stabilizers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-linear controller functions for inertial optical stabilizers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear controller functions for inertial optical stabilizers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1758310