CSA2 Series CSA2-1 Ø2" Lens Tube Stacked Tube SM2 Threaded Shading Tube Cage Coaxial Lens Tube Frame Optical Experiment
Optical commonly used thread size standard This is the unique thread of Thorlabs in the United States, not the commonly used optical thread. SM is the code for the thread of the sewing machine in terms of thread expression, but this company in the United States uses it to connect the internal and external threads of the optical lens and the sleeve. The nature of the thread is UNS, and the United States has a special thread with a tolerance accuracy of 2A / 2B. The special place of this thread is 40 teeth per inch regardless of the diameter. The specific dimensions are as follows: Parameter: (Multiple specifications are available) Model CSA2-0.5 CSA2-1 CSA2-1.5 CSA2-2 Thread type SM2 (2.035"-40) Protruding Thread 3mm Height 0.5 inch (12.7mm) 1 inch (24.5mm) 1.5 inch (38.1mm) 2 inch (50.8mm) Diameter Ø55.9mm compatible with Ø50.8mm optics Weight 16.6g 29.4g 41.6g 54.4g Material #7075 aluminum alloy