This instrument is a modular optical beam system designed for precise projection, alignment, and control of three separate light paths. It emphasizes independent channel adjustment, clear beam definition, and straightforward installation, making it suitable for lab, teaching, and calibration tasks. Key benefits Independent threechannel control: adjust each light pipe separately for parallel or individual alignment tasks. Adjustable beam spot: diode holder rotation and expansion inside the condenser lens barrel, with the condenser lens barrel expanding and contracting inside the objective lens barrel to finetune the size and definition of the beam spot on the white screen. Clear, sharp projection: aim the edge of the spot on the white screen for precise alignment and measurement. Simple installation: dedicated feet and a compact layout with a roundhole light pipe holder that allows smooth rotation. Consistent spacing for reliable results: white screen positioned about 140 mm from the end of the light pipe to maintain uniform projection conditions. Structure The instrument is mainly composed of light pipes, light pipe rack components, light intensity regulators, potentiometer knobs, light pipe rack legs, light source switches, power sockets, light source wiring, white screens, white screen racks, and related accessories. Light pipe design and function The light pipe is formed by the sleeve connection of the diode holder, the condenser lens tube, and the objective lens tube. The diode holder can rotate and expand within the condenser lens barrel. The condenser lens barrel can expand and contract inside the objective lens barrel. This arrangement allows adjustment of the size and definition of the outgoing beam spot that is projected onto the white screen. Installation steps 1) Install the support feet on the light pipe rack and on the white screen as required. 2) Insert the light pipe into the round hole of the light pipe holder and rotate the ball to secure and align. 3) Place the white screen about 140 mm away from the end of the light pipe (the beam exit end). 4) Ensure the components are stable before adjusting. Beam adjustment and operation To adjust the emitted beam, first turn on the power and light the lightemitting diode. Adjust the position of the diode holder and the condenser lens tube to refine the beam. Aim for a clearly defined edge of the spot projected on the white screen. The three light pipes can be adjusted independently to achieve the desired alignment and spot quality. Applications and use scenarios Optical alignment in a photonics or laser lab: use three independently adjustable light pipes to align multiple beams against a single reference screen, ensuring consistent spot definition across channels. Component testing and calibration: verify beam quality and size by adjusting diode holder and condenser lens positions, then compare spot edges on the white screen for repeatable measurements. Educational demonstrations: illustrate how adjusting the diode holder and lens assembly changes beam size and focus, using the white screen as a visual teaching aid. Notes The description maintains the original structure, components, and functional details while presenting clear, customerfocused language. No additional features, models, or specifications have been added beyond the provided information.