optical-quantities

Articles

• EtendueMeasure of the "spread" of light in an optical system
• Rayleigh lengthConcept in laser optics
• Optical powerDegree to which an optical system converges or diverges light
• Optical cross section
• Rayleigh distance
• Beam divergenceHow much a beam expands as it travels
• Optical cross section
• Spatial cutoff frequency
• Optical cross section