Airy Unit
The pinhole diameter expressed as a multiple of the back-projected first-minimum diameter of the Airy disk, which normalizes pinhole size across objectives and emission wavelengths. One Airy unit is the standard compromise, passing about 75 percent of in-focus photons while retaining most of the sectioning benefit.
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The pinhole diameter expressed as a multiple of the back-projected first-minimum diameter of the Airy disk, which normalizes pinhole size across objectives and emission wavelengths. One Airy unit is the standard compromise, passing about 75 percent of in-focus photons while retaining most of the sectioning benefit.
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