PHOTOMETRIC DEVICE
PURPOSE:To execute photometry by various photometric modes, and also to prevent a large-sized optical system, by placing a photometric element in a relfection mirror, providing a lens in front of the photometric element to give the directivity. CONSTITUTION:Lenses 7, 7' and 7'' are po...
Gespeichert in:
Hauptverfasser: | , , , , , , |
---|---|
Format: | Patent |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | PURPOSE:To execute photometry by various photometric modes, and also to prevent a large-sized optical system, by placing a photometric element in a relfection mirror, providing a lens in front of the photometric element to give the directivity. CONSTITUTION:Lenses 7, 7' and 7'' are povided on a reflection mirror 3 coaxially with light beams L, L' and L'' converging to specified image height from a cemera lens 5, so that only light converging to the specified image height reaches photometric elements 6, 6' and 6''. Since, to each photometric element, only a luminous flux having extremely strong directivity is made incident by selecting and combining each photometric output, various photometric modes such as spot photometry, center photometry, circumferential photometry, mean photometry, etc. can be selected. |
---|