Quick Release Cage Plates for 60 mm Cage
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LCP90F Quick Release Magnetic Plate Shown in 60 mm Cage System
The LCP90F consists of a back plate compatible with the 60 mm cage system and a mounting carriage (front plate) that is magnetically coupled with pairs of rare earth magnets to the back plate. For stability, precision, and repeatability, the mounting carriage contacts the back plate at three points. Each point of contact is a ball bearing on the mounting carriage resting in the groove formed by two parallel steel pins. Since the axes defined by the three sets of pins share a common point of intersection, the system is properly constrained (kinematic). The mounting carriage can be easily inserted or removed from the fully assembled cage system by separating it from the back plate, rotating it sideways, and then extracting it from the cage.
The internal SM2 threading allows components up to 0.345" (8.7 mm) thick to be secured in the mounting carriage with the included SM2RR retaining ring. Components with external SM2 threading (OD = 2.2" (55.9 mm)) cannot extend more than 1" (25.4 mm) beyond the face of the mounting carriage without sacrificing the ability to remove the mounting carriage and component from a closed cage system. The lateral repeatability specification (10 µm) indicates that the X, Y, and Z position of the mount will not vary by more than 10 µm after being removed and replaced, while the 1 µrad angular repeatability refers to the rotation of the optic not changing by more than 1 µrad.
Both the LCP90F and LCP90F-B have four cage rod through holes that are accompanied by a side-located locking 4-40 setscrew, which can be secured using a 0.05" hex key.
The QRC2A cage mount is equipped with a spring-loaded dovetail clamp that secures or releases the cage mount to two of the four ER rods in the cage structure. The cage plate has internal SM2 threading that allows for components up to 0.15" (3.8 mm) thick to be secured with the included SM2RR retaining ring. In addition, components up to 1" (25.4 mm) thick [not including length of threaded stub, OD = 2.2" (55.9 mm)] with external SM1 threading can be attached without sacrificing the ability to remove the cage plate from a closed cage system.