SE330784BSE07147/66ASE714766ASE330784BSE 330784 BSE330784 BSE 330784BSE 07147/66 ASE07147/66 ASE 07147/66ASE 714766 ASE714766 ASE 714766ASE 330784 BSE330784 BSE 330784B
Authority
SE
Sweden
Application number
SE07147/66A
Inventor
D Cooper
Original Assignee
Polaroid Corp
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 Polaroid CorpfiledCriticalPolaroid Corp
Publication of SE330784BpublicationCriticalpatent/SE330784B/xx
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
G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means
G01J1/122—Visual exposure meters for determining the exposure time in photographical recording or reproducing
G01J1/124—Visual exposure meters for determining the exposure time in photographical recording or reproducing based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface