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| physical object > artifact > device > instrument > optical device > wavefront modifier > spectrograph dispersing element > diffraction grating > blazed grating | 
| blazed grating comparison table | ||
| Subject | is a kind of | has definition | 
|---|---|---|
| diffraction grating | spectrograph dispersing element | An optical device containing thousands of very fine parallel grooves which produce interference patterns in a way which separates out all the components of the light into a spectrum. | 
| blazed grating | diffraction grating | Diffraction grating so ruled that the reflected light is concentrated into only a few orders, or even a single order, of the spectrum. | 
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