1. Light Guide: The light guide consists of the sleeve connection of the diode holder, condenser lens, and objective lens. The diode holder can rotate and extend within the condenser lens tube, and the condenser lens tube can expand and contract within the objective lens tube to adjust the size and resolution of the light spot on the white screen. 2. Structure: This instrument mainly comprises light guides, light guide frame components, light intensity regulators, potentiometer knobs, light guide frame legs, light source switches, sockets, light source wiring, white screens, white screen frames, etc. 3. Install the Device: Mount the support legs on the light guide frame or the white screen. Insert the light guide into the round opening of the light guide holder to rotate the sphere. The white screen is positioned approximately 14 mm from the end of the light guide (beam exit end). 4. Adjust the Light Beam Emitted by the Light Guide: Turn on the power supply, allow the LED to illuminate, and adjust the position of the diode holder and condenser tube so that the edge of the light spot projected onto the white screen is clear. The three light guides are adjusted separately.