Diffractive Optical Element

Output Power: ≤200 mW Transverse Mode: Multimode Drive Mode: Analog Modulation, Digital Modulation, Computer Control

Diffractive optical elements (DOEs) are an emerging class of optics. Micro/nano-etching typically forms two-dimensional arrays of diffractive units with defined geometry and refractive index to control laser-wavefront phase precisely. Light diffracts at each unit and interferes at a distance, usually infinity or a lens focal plane, to create a specified intensity distribution. ELITE works with overseas DOE suppliers and offers customized elements. Sixteen patterns are available, including dot matrices and 3-, 5-, 7-, 11- and 81-line patterns.

Light-splitting element: Reflection diffraction grating Light-source system: Low-pressure mercury lamp (wavelength calibration) + broadband LED source (continuous spectrum) Output Wavelength: Continuously adjustable (covering the visible region)

The BEX-8518 diffraction-grating-based comprehensive photoelectric-effect apparatus was jointly developed by Boyuan Optoelectronics and Southeast University. It won first prize in the thirteenth self-made-instrument competition of the national university experimental-physics teaching research association and is a new-generation system for introductory university physics laboratories. Traditional experiments combine mercury-lamp lines with bandpass filters, providing only five discrete wavelengths: 365nm, 405nm, 436nm, 546nm, and 577 nm. Students cannot observe continuous spectral response. This apparatus uses a reflective diffraction-grating monochromator with a low-pressure mercury lamp and broadband LED source to provide continuously tunable monochromatic light. The mercury lamp calibrates wavelength; the broadband LED supplies a continuous spectrum, from which the grating selects any wavelength to illuminate the phototube. The controller acquires photocurrent and stopping voltage for Planck-constant determination, spectral-response studies, and current-voltage measurements, allowing wave-particle duality to be verified within one apparatus. All optics mount on a precision breadboard with an open, visible path, showing the complete collimation-dispersion-focusing structure. This overcomes the teaching limitations of enclosed monochromator black boxes and supports both verification experiments and design-oriented inquiry in general- and modern-physics teaching.

Metalens Metasurface Uses Varied Subwavelength Arrays for Phase/Amplitude/Focus/Imaging,Thin/Light for Integration;慕德微纳 Nanometre High-Aspect Arrays for Visible/NIR.