Abstract: A momentum balance-mechanism is disclosed in which a mirror or other object which must be rapidly dithered around tip and tilt axes is supported above a base. The momentum balance-mechanism permits rapid dithering of the mirror or other mechanism while minimizing the reaction forces generated by rotation of the mirror or other object. The mirror which is subject to being dithered and a balance weight are independently supported to permit each to rotate about a common center in opposite directions to achieve a momentum-balanced scanning system. The mirror and balance weight are independently supported by two concentrically-located tripods which terminate in a common support base at one end and in two interface fittings at the other end. One of the interface fittings supports the mirror while the other interface fitting supports the balance weight. The mirror and the balance weight rotate about the virtual intersection of the two sets of tripod legs.

Abstract: An adjustable mount for optical components is disclosed which permits a component held by the mount to be adjusted with six degrees of freedom. The mount includes means for locking the components of the mount to prevent vibration from affecting the adjustment of the mount while still permitting the mount to be assembled without applying excessive pressure to the mount's components, thereby permitting the position of an optical component held by the mount to be easily changed. When used to support an optical component, the mount permits the focus, tip and tilt, radial translation and rotation of the optical component relative to the brackets supporting the component to be changed without the need to cement the components of the mount into place to prevent vibration from affecting the adjustment of the components of the mount.