3nh company history
3nh starts from 1998, and has launched YS series Grating spectrophotometer, NS series spectrophotometer and NH, NR series colorimeter, ISO12233 resolution test chart, optical image test solution and s...
Prouducts 
Contant News
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Shanghai ChinaCoat 2017 - 3nh
3nh Shenzhen office will join this China Coat 2017, and we will bring YS series color measuring spectrophotometer, NS series handheld spectrophotometer, portable colorimeter, single angle and tri angl...
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ISO published new resolution standard for a good reason!
The International Organization for Standardization published a revision of “ISO 12233 Photography — Electronic still picture imaging — Resolution and spatial frequency responses” in February 2014....
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How to convert between sRGB and CIEXYZ
How to convert between sRGB and CIEXYZ Describing color has always been a complex challenge. Cameras provide their image data in the common sRGB color space, so chances are high that any image ...
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CIE Standard Observers
In the visual observing situation, the observer is the human eye that receives the light reflected from or transmitted through an object, and the brain which perceives the vision. The visual observing...
