Precision Optical Experiment One-Way Fine-Tuning Blade Manual Adjustable Slit

Optical Slit Diaphragm Manual Single Opening Micrometer Adjustment Table

Precision Manual Adjustable Slit Optical Experiment One-Way Fine-Tuning Blade

Precision Optical lab slit 20um x approx 4mm.

Optical Single Opening Slit Experiment Platform Luminous Flux Adjustment Frame

Precision Optical Experiment One-Way Fine-Tuning Blade Manual Slit Adjustable

Micrometer Driven Slit Assembly 2" wide ~ MS257