12x35mm Aluminum Laser Housing for TO18 5.6mm with Plastic Lens

This 12×35mm aluminum laser diode housing is a modular cylindrical enclosure designed to hold a TO-18 packaged laser diode (5.6mm) along with its driver board. The main body is a lightweight aluminum cylinder that provides mechanical protection and acts as a heat-conducting path for the diode, helping to dissipate the heat generated during operation. The housing features a detachable base and a removable head that includes a plastic lens and lens cap, allowing users to access the diode and adjust the assembly as needed. Because the TO-18 laser diode is sensitive to thermal buildup and electrical drift, mounting it in a metal housing is a practical way to improve thermal stability in continuous or pulsed operation. This TO18 laser housing is commonly used in DIY laser module builds, educational optics projects, and compact laser pointer assemblies where a 12mm diameter barrel is required. The plastic lens focuses the emitted beam, and the lens cap protects the optical surface from dust and scratches when the module is not in use. The 35mm length provides enough internal space for a small driver board and wiring, while the 12mm outer diameter keeps the overall footprint compact. Whether you are replacing a damaged housing or building a custom laser module from individual components, this 5.6mm laser case offers a straightforward mechanical solution for integrating a TO-18 diode into a finished assembly.