Diffraction Grating 50 Lines Optical Spectrophotometer for Teaching Experiment

Diffraction Grating 80 Lines/mm for Spectrophotometer Teaching Experiments

for SPECTRUM Analysis Tool Diffraction Grating Wavelength Range 200nm 2000nm

Diffraction Grating 80 Lines for Spectrophotometer Teaching Experiments

Optical Diffraction Grating for Classroom Demonstrations and Experiments

Optical Diffraction Grating Transmission Type For Spectrophotometer Experiments

Optical Diffraction Grating Spectrophotometer for Teaching and Experiments