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Pulse position modulation (ppm)
| Glossary Of Laser Terminology |
A means of encoding digital data by varying the position of a bit in a word that has m bit positions.
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Holography, английский
A medium for bending and focusing light that uses the interference of monochromatic objects and reference waves to record and reproduce multiple two-dimensional images for three-dimensional viewing.
Optical density, английский
- A logarithmic expression for the attenuation produced by an attenuating medium, such as an eye protection filter.
- A logarithmic measure of the power attenuation, or the refractive index
- Оптическая плотность. см. absorbance — спектральная поглощатёльная способность.
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