Simply put, a fiber optic cage (also commonly called an optical transceiver cage or cage assembly) is a precision metal housing designed to securely hold, align, and connect an optical transceiver module to a printed circuit board (PCB). Optical systems built this way can be more compact than can be achieved using an optical table, and the system provides more flexibility than an optical. An optical cage system uses four rigid steel rods to mount optical components along a common optical axis. Cage systems are available with center-to-center rod spacings of 16 mm, 30 mm, or 60 mm so as to accommodate Ø1/2", Ø1", or Ø2" optics, respectively. Thorlabs provides an extensive selection. Optical Cage Systems are used to create optical setups in a variety of prototyping or university research applications. Optical Cage Systems are designed for modularity with. Our systems are compatible with industry standards, though, our intent was to design and build cage systems that are more stable and accurate vs. A unique feature is the ability to place and remove individual components by “Dropping them In-Place” when 3-rods are. Newport OpticsCage+™ offers fast, snap-in assembly for optical systems.