The N-BK7 Ground Glass Alignment Disk is made of ground glass diffuser. Due to the diffuse reflection properties of ground glass, the user can see the beam size and spot position from the side, allowing for observation of the beam status within the optical path and facilitating real-time optical path adjustments. The LBTEK Ground Glass Alignment Disk features an alignment hole in the center, allowing the user to clearly observe the outgoing beam position. All LBTEK circular optical components can be mounted in LBTEK standard lens tubes, fixed lens mounts, and various coaxial mounting plates. Customers can select the optimal mounting method for their specific application.