Part name: Interference diffraction grating set Material: Plastic Size: As shown Color: As shown Overview This interference diffraction grating set provides five distinct optical elements for classroom experiments, laboratory demonstrations, and hobbyist optics work. Precisely defined slit widths, spacings, and pattern geometries produce predictable diffraction and interference results for analysis and comparison. Key features and specifications Single slit options: slit widths 0.05 mm, 0.10 mm, 0.20 mm. Double slit: slit width 0.05 mm with spacing options 0.20 mm, 0.30 mm, 0.45 mm. Point apertures: point diameters 0.20 mm, 0.30 mm, 0.40 mm. Mesh grid: 90 degree cross lines with line densities of 20 lines/mm, 40 lines/mm, and 60 lines/mm. Composite grid: contains single, double, triple, and quadruple seams plus multiple line patterns and shaped apertures. Seams for single, double, triple, and quadruple are 0.06 mm with 0.05 mm spacing and overlapping arrangements. Multipleline patterns include 30 lines/mm and 60 lines/mm. Shaped apertures include round hole diameter 0.36 mm, triangle side length 0.30 mm, square side length 0.20 mm, and rectangle size 0.60 mm by 0.28 mm. Package contents 1 x singleslit grid, 1/2 inch 1 x doubleslit grid, 1 inch 1 x round hole grid, 1 inch 1 x mesh grid, 1/2 inch 1 x composite grid Why this set is useful Versatility: Multiple slit widths, spacings, point sizes, and grid densities let you compare interference and diffraction behavior across configurations without needing separate parts. Precision: Defined slit widths, spacings, and line densities give consistent, repeatable patterns for measurement and demonstration. Ease of use: Lightweight plastic pieces are easy to handle, mount, and switch during experiments. Compact and complete: A compact set that covers basic and advanced patterns for education, optical alignment, and experimental demonstration. Applications and use scenarios Classroom demonstration: Show singleslit and doubleslit diffraction, measure fringe spacing, and illustrate the effect of slit width and spacing on pattern visibility. Laser experiments and alignment: Produce stable diffraction patterns for wavelength estimation, beam profiling, and comparing beam quality. Optical testing and imaging: Use mesh and composite patterns to evaluate imaging system resolution, test microscope illumination, or calibrate detectors. Performance and compatibility Function: Suitable for visiblelight diffraction and interference demonstrations with lasers, LEDs, and broadband sources. Material: Durable plastic construction for routine handling and setup flexibility. Size and mounting: Grids are supplied in common small sizes so they can be mounted in standard optics holders or used freehand for quick demonstrations. Notes Follow safe laser handling practices when using coherent light sources. Sizes and patterns are provided as shown in product images and technical details.