1. Structure: This instrument mainly consists of optical fibers, optical fiber rack components, light intensity regulators, potentiometer knobs, optical fiber rack legs, light source switches, power sockets, light source wiring, white screens, white screen stands, etc. 2. Optical Fiber: The optical fiber is formed by the sleeve connection of the diode holder, condenser lens tube, and objective lens tube. The diode holder can rotate and extend within the condenser lens tube, and the condenser lens tube can extend and retract within the objective lens tube to adjust the size and clarity of the outgoing beam's spot on the white screen. 3. Install the Instrument: Attach the support legs to the optical fiber rack and the white screen stand. Insert the optical fiber into the round hole of the optical fiber holder to rotate the sphere. The white screen is placed approximately 140 mm away from the end of the optical fiber (beam exit end). 4. Adjust the Light Beam Emitted by the Optical Fiber: Turn on the power to illuminate the LED, then adjust the position of the diode holder and condenser lens tube so that the edge of the light spot projected onto the white screen is clear. The three optical fibers are adjusted separately.