Diffraction Grating 50 Lines Optical Spectrophotometer for Teaching Experiment

Diffraction Grating 80 Lines/mm for Spectrophotometer Teaching Experiments

Diffraction Grating Spectrophotometer for Teaching 50 100 300 600 Lines

2mm Thickness Diffraction Grating Suitable for Laboratory Use and Education

Transmission Grating Spectrophotometer with Various Line Options Available

Diffraction Grating Spectrophotometer 50 Lines for Teaching Experiment

Spectroscopy Diffraction Grating Spectrophotometer with Various Line Options

Spectroscopy Equipment Transmission Diffraction Grating Spectrophotometer