Platform for stereoscopy for hand-held film/video camera stabilizers
View Patent ↗To compensate for changes in weight distribution of transportable, hand-held camera supports when one or both camera translate or pivot in a two-camera stereographic imaging system, the bottom of the elongated camera support attaches to a compensation mechanism. The mechanism has a balance plate movable laterally on a bottom housing. Ballast mounts below the bottom housing. A motor in the bottom housing moves the balance plate and the pole laterally in response to camera pivoting or lateral movement to maintain the center of gravity of the system centered along the longitudinal axis of the elongated support.
1. A portable camera transport system comprising:
an upright support having a longitudinal axis and two ends;
a camera support mounted to one end of the upright support for receiving a stereographic camera including first and second cameras, an interocular motor to set an interocular distance between the first camera and the second camera, and a convergence motor to set a convergence angle between the first camera and the second camera;
a ballast mounted to the other end of the upright support;
a balance mechanism for automatically moving the camera support generally perpendicular to the longitudinal axis relative to the ballast, the balance mechanism comprising a balance plate and a balance housing moveable relative to each other, a balance motor in the balance housing engaging the balance plate for positioning the balance plate relative to the balance housing; and
a control system to control the balance motor to position the balance plate relative to the balance housing using the following equation:
Y=m 1 X 1 +m 2 X 2 +b , wherein
Y=a position of the balance motor,
m 1 =a predetermined Convergence Factor,
m 2 =a predetermined Interocular Factor,
X i =a position of the convergence motor,
X 2 =a position of the interocular motor,
b= a predetermined Offset.
2. The system of claim 1 wherein one end of the upright support attaches to the balance mechanism.
3. The system of claim 1 further comprising an upright support fitting receiving the upright support, and balance plate having openings for attaching the upright support fitting at one of a plurality of positions on the balance plate.
4. The system of claim 1 wherein the balance mechanism further comprises at least one rail receiving channel and at least one rail opposed to the at least one rail receiving channel, each rail receiving channel receiving a rail for movement of the rail relative to the rail receiving channel.
5. A method of operating a camera system, wherein the camera system includes an upright support having a longitudinal axis and two ends, a camera support mounted to one end of the upright support, a stereographic camera including first and second cameras mounted to the camera support, a ballast mounted to the other end of the upright support, and a balance mechanism for automatically moving the camera support generally perpendicular to the longitudinal axis relative to the ballast, the balance mechanism comprising a balance plate and a balance housing moveable relative to each other, a balance motor in the balance housing engaging the balance plate for positioning the balance plate relative to the balance housing, the method comprising:
setting an interocular distance between the first and second cameras using an interocular distance motor;
setting a convergence angle between the first and second cameras using a convergence motor; and
controlling the balance motor to position the balance plate relative to the balance housing using the following equation:
Y=m i X i +m 2 X 2 +b , wherein
Y=a position of the balance motor,
m 1 =a predetermined Convergence Factor,
m 2 =a predetermined Interocular Factor,
X i =a position of the convergence motor,
X 2 =a position of the interocular motor,
b=a predetermined Offset.