The LBTEK Fixed Microscope Slide Holder is designed for petri dishes and microscope slides on the Z-axis of LBTEK's three-axis translation platform, enabling integration into customized microscope setups such as optical tweezers. Two sets of mounting holes provide versatile applications: one set features four M4 countersunk holes with a 12.5 mm spacing, while the other has two M6 countersunk slots with a 50 mm spacing, ensuring compatibility with various components. The spring clips can be rotated for easy replacement of glass slides and petri dishes. The OT-SH1 clamp features a central 25.4 mm clear aperture for light transmission. The OT-SH35 offers a larger 35 mm clear aperture, accommodating not only microscope slides but also test targets, large-diameter objectives, and other rectangular optical components with widths exceeding 44.0 mm.