Why Resolution Improves

While many concentrated arc lamps provide good luminous density, the distribution over the arc is highly non-uniform. The projection of such an arc onto the condenser aperture will then no longer illluminate the aperture uniformly. As a result, the diffraction pattern produced by each point in the specimen will depart from the ideal Airy disk, further limiting the resolution obtainable. The Scrambler projects a nearly uniform source of illumination onto the specimen, whose diffraction pattern more closely approaches the ideal Airy disk, thus effecting a dramatic improvement in resolution.