20x20mm One Dimensional Holographic Diffraction Grating Laser Beam Gratings

Small diffraction grating spectroscope geology tool with leather case

Silver Diffraction Grating Spectroscope Gem/Gemological Tool for GIA use

20x20mm Glass Holographic Diffraction Grating Laser Beam Spliter Interference

20x20mm One Dimensional Holographic Diffraction Grating Laser Beam Gratings

Ultra Precision Nano Engraving PET Trasmission Diffraction Grating 36x38mm

10x Laser Line Module Lens / Plastic Colophony 30°/45°/60°/90°/120° Optional

Planar Diffraction Grating One Dimensional Holographic Interference Spectrometer