| Zugriffsnummer | 45408 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Evaluation of the emissivity of a cavity source by reflection measurements |
| Autor(in); Institution |
Bauer, Georg; 4, Optik, PTB-Braunschweig
Bischoff, Kurt; 4.11, Strahlungsleistung, PTB-Braunschweig
|
| Quelle/Jahr | Applied Optics: 10 (1971), 12, 2639 - 2643 |
| ISSN | 1559-128X (PRINT) ; 1539-4522 (ONLINE) |
| DOI | |
| Verlag | Washington, DC: Soc. |
| Zusammenfassung | The emissivity ∊c of cylindrical cavities with different bases (flat, perpendicular to the axis; flat, inclined to the axis; conical) is derived from measurements of the cavity reflectance ρc. A general formula for the calculation of ρc = 1 − ∊c is given, which holds for high values of the ratio length L of the cylinder to radius R of the cylinder. For a flat base perpendicular to the axis only the value of the reflectance ρ0 of the wall material is needed; in both other cases one must refer to the measurements. |
