| blazed grating | has definition Diffraction grating so ruled that the reflected light is concentrated into only a few orders, or even a single order, of the spectrum. |  |
| is a kind of diffraction grating |  |
| spectrograph dispersing element | has dispersion |  |
| has wavefront modification wavelength |  |
| instrument | has operator |  |
| artifact | has creator |  |
| has creation date |  |
| has purpose |  |
| has owner |  |
| physical object | has location or center of gravity |  |
| has angular momentum |  |
| has mass |  |
| has velocity |  |
| has momentum |  |
| has temperature |  |
| has volume |  |
| has extent |  |
| has material |  |