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Translating Cage Segment Plates![]()
Front Back CPX1 30 mm Translating Cage Segment Plate Application Idea LCPX1 Post-Mounted via 8-32 (M4) Tap on Bottom with Moving World Offset by 8 mm LCPX1 60 mm Translating Cage Segment Plates Related Items ![]() Please Wait ![]() Click to Enlarge Iris Mounted in CPX1 Translated 4 mm to Select Output from Beam Displacer Features
Thorlabs' 30 mm and 60 mm Translating Cage Segment Plates allow an entire cage subsystem to be laterally offset. Each consists of two plates: the fixed world plate is attached to a fixed cage segment, while the moving world plate translates all attached cage elements. This makes the translating cage segment plate ideal for compensating for the beam displacement caused by optics such as plate beamsplitters, anamorphic prism pairs, and beam displacers (shown to the right). To translate the moving world, first loosen the position-locking cap screw located on the top of the part with a 5/64" (2.0 mm) hex key (not included). Then, slide the moving world plate along the dovetail until the desired displacement is achieved. Tighten the position locking screw and then attach any additional components to the moving world plate. Alternatively, the translating plates can be rotated 90° for vertical translation (shown above) to correct for beam displacement in the Y axis, but it cannot be post-mounted in this orientation. To mount the translating cage plate onto a Ø1/2" post, the fixed world plate is equipped with an 8-32 (M4) tapped hole on the bottom. The fixed world plate has four blind holes for attaching cage rods. Each rod is held in place by a side-located M4 x 0.7 locking setscrew, which can be secured using a 5/64" (2.0 mm) hex key. The moving world plate has four 4-40 tapped holes to attach ER series cage rods. To aid in alignment, the fixed world plate is laser engraved with a 1 mm graduated scale, while the moving world plate is engraved with a witness line. Cage System OverviewThe Cage Assembly System provides a convenient way to construct large optomechanical systems with an established line of precision-machined building blocks designed for high flexibility and accurate alignment. 16 mm, 30 mm, and 60 mm Cage System StandardsThorlabs offers three standards defined by the center-to-center spacing of the cage assembly rods (see image below). The 16 mm cage, 30 mm cage, and 60 mm cage standards are designed to accomodate Ø1/2", Ø1", and Ø2" optics, respectively. Specialized cage plates that allow smaller optics to be directly inserted into our larger cage systems are also available. Standard ThreadsThe flexibility of our Cage Assembly System stems from well-defined mounting and thread standards designed to directly interface with a wide range of specialized products. The three most prevalent thread standards are our SM05 Series (0.535"-40 thread), SM1 Series (1.035"-40 thread), and SM2 Series (2.035"-40 thread), all of which were defined to house the industry's most common optic sizes. Essential building blocks, such as our popular lens tubes, directly interface to these standards. ![]() An example of the standard cage plate measurements determining cage system compatibility.
![]() ![]() Click to Enlarge CPX1 Rotated 90° to Correct for Vertical Beam Displacement within a 30 mm Cage System
The CPX1(/M) Translating Cage Segment Plate allows a 30 mm cage system to be laterally offset. The moving world plate has a 5.3 mm deep, SM1-threaded (1.035"-40) central bore for attaching lens tubes or SM1-threaded mounted optics, such as filters or irises. A single SM1RR retaining ring, sold separately, can be used for securing an unmounted optic up to 3.0 mm thick against the retaining lip of the moving world plate. The aperture on the fixed world plate is 1.32" wide, so that even a maximum offset of 6 mm will still have a minimum clear aperture of 0.89". The maximum clear aperture is 0.94", which is the inner diameter of the retaining lip on the moving world plate. ![]() ![]() Click to Enlarge LCPX1 Rotated 90° to Correct for Vertical Beam Displacement within a 60 mm Cage System
The LCPX1(/M) Translating Cage Segment Plate allows a 60 mm cage system to be laterally offset. The moving world plate has a 5.84 mm deep, SM2-threaded (2.035"-40) central bore for attaching lens tubes or SM2-threaded mounted optics, such as lenses or irises. A single SM2RR retaining ring, sold separately, can be used for securing an unmounted optic up to 3.0 mm thick against the retaining lip of the moving world plate. If the moving world is offset at the maximum of 12 mm, the moving world will still have a minimum clear aperture of 1.73" (43.9 mm). The maximum clear aperture is 1.90", which is the inner diameter of the retaining lip on the moving world plate. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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