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30 mm Cage to Ø1/2" Post Adapters
CPTR20 Adapter Used to Integrate a
10 mm Offset
Thorlabs' 30 mm cage to Ø1/2" post adapters allow the integration of our post-mounted components into our 30 mm cage system. The front face of this clamp is similar to the CP33 cage plate and accommodates our Ø6 mm ER cage rods, which are secured using the side-located locking 4-40 setscrews and are 30 mm apart. The center-located SM1 (1.035"-40) threaded bore, which is compatible with our popular Ø1" lens tubes, directly accepts a Ø1" optic up to 0.19" (4.8 mm) thick. Two SM1RR retaining rings are included. For additional information on our cage system, please refer to the Cage Overview tab.
The tail stock of this adapter has a double-bored through-hole and a spring-loaded thumbscrew that provides three-point contact for Ø1/2" posts for secure placement. Two versions are available, providing either 10 mm [CPTR10(/M)] or 20 mm [CPTR20(/M)] separation between the post center and the back of the cage plate.
Cage System Overview
The 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 Standards
Thorlabs 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.
The 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.