Product description Key benefits Precise control of beam size and resolution: adjustable diode holder, condenser lens tube and objective lens tube let you shape the light spot on the white screen for repeatable results. Independent adjustment of three light guides: each light guide is set separately for multi-source comparisons or multi-wavelength tests. Simple installation and operation: quick mechanical assembly and straightforward electrical controls get the instrument ready for use without complex alignment tools. Integrated intensity control: potentiometer knobs and light source switches provide fast, fine control of LED brightness and beam appearance. What the instrument does The light guide assembly (Lichtleiter) couples an LED diode holder, a condenser lens and an objective lens in a sleeve connection. The diode holder can rotate and move inside the condenser lens tube; the condenser tube can slide in and out of the objective lens tube to adjust the beam diameter and the sharpness of the spot projected on the white screen. The complete instrument includes: light guides, light guide frame components, light intensity controller(s), potentiometer knobs, frame legs, light source switches and sockets, light source wiring, white screen(s) and white screen frames. Key attributes and compatibility Function: adjustable optical beam projection with independent control of three light guides. Components: diode holder, condenser lens tube, objective lens tube, potentiometer-based intensity control, switches and sockets for the light sources, white projection screen with frame, and supporting frame legs. Spatial setup: recommended distance from the light guide exit to the white screen is approximately 140 mm for optimal spot projection. Performance: mechanical sleeve connections allow rotation and axial adjustment of diode holder and condenser tube to tune spot size and edge sharpness; intensity controls adjust LED output and visual brightness. Installation and basic use Assembly: attach the support feet to the light guide frame and to the white screen frame. Insert each light guide into the round opening of its holder so it can be rotated and positioned. Positioning: set the white screen about 140 mm from the light guide beam exit as a starting point. Beam adjustment: switch on power and light the LED. Adjust the diode holder position and slide the condenser tube within the objective tube until the edge of the projected light spot on the white screen is sharp. Repeat adjustments for each of the three light guides independently. Intensity: use the potentiometer knobs to fine-tune LED brightness. Typical applications Optics education and demonstrations: teach lens coupling, beam focusing, and imaging principles using a visible, adjustable beam and an easy-to-read white screen. Quality inspection and alignment: project and shape a precise light spot for alignment checks, small-area inspections, or visual comparison of LED outputs. Sensor and detector testing: produce repeatable, adjustable illumination conditions for calibration or response testing of photodetectors and light sensors. Why customers choose this product Clear mechanical control over beam geometry without complicated optics: rotation and axial movement of the diode holder and condenser/ objective tubes provide intuitive adjustments. Independent control of multiple light guides for comparative tests or multi-source setups. Built-in intensity control and standard electrical connections make the unit ready to integrate into lab, classroom, or inspection environments. What you receive Assembled components for the light guide system: three light guides with diode holders and lens sleeves, light guide frame with legs, potentiometer knobs and intensity controller, switches and sockets with wiring, white screen and frame, and mounting feet. Support and operation tips Start with the white screen at 140 mm from the light exit and make small axial adjustments to the condenser tube for spot-size control. Rotate the diode holder gently to center the LED if the spot is asymmetric. Adjust intensity with the potentiometer to examine edge definition at different brightness levels. This instrument preserves the original component layout and functionality: diode holder, condenser lens and objective lens in sleeve connections, three separately adjustable light guides, intensity control via potentiometers, and a white screen positioned at about 140 mm from the beam exit.