Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Landis & Gyr A G.filedCriticalLandis & Gyr A G.
Application grantedgrantedCritical
Publication of AT194974BpublicationCriticalpatent/AT194974B/de
G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
G01J1/00—Photometry, e.g. photographic exposure meter
G01J1/02—Details
G01J1/04—Optical or mechanical part supplementary adjustable parts
G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
G01J1/0414—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using plane or convex mirrors, parallel phase plates, or plane beam-splitters
