Diffraction Grating 50 Lines Optical Spectrophotometer for Teaching Experiment

Diffraction Grating 80 Lines/mm for Spectrophotometer Teaching Experiments

Transmission Diffraction Grating Optical 50x50mm Teaching Demonstration

Optical Diffraction Grating Spectrophotometer for Educational Purposes

50x50mm Circular Interference Diffraction Grating Set for Optical Experiments

Diffraction Grating Spectrophotometer for Teaching 50 100 300 600 Lines

2mm Thickness Diffraction Grating for Optical Teaching Demonstration Experiment

Transmission Diffraction Grating for Optical Spectrophotometer 50 100 300 600