The LBTEK 30 mm coaxial system cylindrical lens mount is designed to install cylindrical lenses or other rectangular optical components into a 30 mm coaxial system. The mount primarily consists of three main parts: upper and lower sliding arms, a coaxial plate, and two 50 mm long Ø6 mm coaxial rods. The optical component is mounted between the two sliding arms, each of which is lined with a rubber pad and features an edge that conforms to the lens surface for secure lens fixation. Each sliding arm and the coaxial plate are secured to the Ø6 mm posts using two M3 set screws. The sliding arms and coaxial plate can be separately adjusted and locked. Therefore, when the coaxial plate is loosened while the sliding arms remain tightened, users can translate the lens parallel to the coaxial rods (i.e., in the lateral direction) without affecting other parts of the coaxial system. Additionally, users can reposition the sliding arms from one side of the coaxial plate to the other, enabling switching between left-handed and right-handed configurations based on the application environment. Furthermore, both sides of the coaxial plate feature scale markings, with primary divisions spaced at 5 mm intervals and secondary divisions at 1 mm intervals, covering a total length of 20 mm. To assist in aligning the optical component coaxially, since the central main scale line on the coaxial plate is positioned on the centerline of the coaxial system, and the cylindrical axis of the lens is parallel to the sliding arms, users can achieve coaxial alignment by comparing the upper and lower scale lines on the coaxial plate while adjusting the sliding arms.