The flat bottom of the BPH's slotted base prevents the optical table mounting surface from the localized bending that typically occurs with fork-clamp mounted pedestal posts. In this way, stresses will not be induced into the skin of the optical table, making it more stable.

The integrated slotted bases of these post holders features both angled and straight reference surfaces and allow edge-to-edge mounting of adjacent post holders. With the addition of the BPH-XB-5 Base Extender, the slotted bases can convert to a double-slotted base for more flexibility in mounting to optical surfaces.

The top surface of the BPH post holder has a series of kinematic indentations which, when used with the BPH-C-5 Post Collar, provide repeatable rotational alignment and indexing at 45-degree increments.

By using precision machining techniques to remove a small portion of the interior surface opposite the set screw of our BPH Series Slotted-Base optical post holder, two lines of contact are created with a post when it is pushed in by the screw. These two lines of contact provide greater stability compared to a post held in place against another circular surface.

Post holders are available with heights of 1.0 in, 2.0in., 3.0 in. and 4.0 in. Each is offered with or without magnetic bases that provide additional ease in alignment and mounting of optical components. Cost-saving pack of 10 post holders are also available in each size while collars (BPH-C-5) and base adapters (BPH-XB-5) are sold in packs of 5. Post and Post Holder Combo Packs including one post of each size and four sizes of SP-series stainless steel optical posts provide a great starting set or stock for an optics lab.

A convenient, cost-saving pack of ten Post Holders with Post Packs or Post Holders is also offered at a discount for customers outfitting new laboratories or new research applications.