WebJul 12, 2016 · Optical Density vs. Transmittance vs. % An optical density of six (or OD6) for example describes that at a given wavelength a filter transmits only one millionth of the incident radiation. Please ... WebMay 24, 2024 · $\begingroup$ Optical density is extremely used in academic contexts, for example in the spectroscopy field where OD (optical density) is the logarithmic light absorbance. Also recall how ND filters in optics are "neutral density" because they display an optical density (in absorption terms) that is roughly the same for a broadband region, and ...
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Optical Density - an overview ScienceDirect Topics
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