spookyphoto
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Recently I've been thumbing thru a calibration manual for a Kodak 1B model 5 and the MTL Star sensitometers. Both of which I have used and calibrated in my previous life. Both units were in the $ 250K range and are considered the finest on the planet. I've selected some pages to post that I think some people here might be interested in. In the table of contents you will see the steps that are taken. In looking at all the pages that I posted make sure you read the file name "scanned image last.jpg. This is the worst nightmare that a photo analyst can have. After all the calculations and calibration steps the last line reads "Conclusions: Differences between calculated and measured values cannot be accounted for. ASD/ENAML photometer may be in error." Ouch
All measuring instruments are NBS traceable. This brings up the old chicken and the egg problem.
How do you calibrate a bulb ? With a spectrophotometer and photometer.
How do you calibrate the photometer ? With a calibrated light bulb.
Special thanks to Kino for giving me the manual.
All measuring instruments are NBS traceable. This brings up the old chicken and the egg problem.
How do you calibrate a bulb ? With a spectrophotometer and photometer.
How do you calibrate the photometer ? With a calibrated light bulb.
Special thanks to Kino for giving me the manual.