Handheld Gemology Instrument with Clear Spectral Display via Grating Optics

Diffraction Grating Handheld Spectrometer Diffraction Optics Eyepiece Viewing

Handheld Spectrometer Diffraction Optics Clear Spectral Display Eyepiece Viewing

Compact 55x15mm Spectroscopic Accessory for Light Analysis and Teaching

Spectroscopic Analysis with Transmission Diffraction Gratings Available

Handheld Spectrometer Diffraction Optics Clear Spectral Display Eyepiece Viewing