Question: Who developed more in sample illumincation in 1953?
About the article "Microscope", section "Rise of modern light microscopy".

Candidate passages:
While basic microscope technology and optics have been available for over 400 years it is much more recently that techniques in sample illumination were developed to generate the high quality images seen today.
In August 1893 August Köhler developed Köhler illumination.
This method of sample illumination gives rise to extremely even lighting and overcomes many limitations of older techniques of sample illumination.
Before development of Köhler illumination the image of the light source, for example a lightbulb filament, was always visible in the image of the sample.
The Nobel Prize in physics was awarded to Dutch physicist Frits Zernike in 1953 for his development of phase contrast illumination which allows imaging of transparent samples.
By using interference rather than absorption of light, extremely transparent samples, such as live mammalian cells, can be imaged without having to use staining techniques.
Just two years later, in 1955, Georges Nomarski published the theory for differential interference contrast microscopy, another interference-based imaging technique. 
  "The Love Experience" contains a sample of "My Friend in the Sky", as performed by Switch  "Guess Who Loves You More" contains a sample of "Can't Hide Love", as performed by Earth, Wind & Fire  "Ask Yourself" contains a sample of "Right on Time", as performed by Boyz II Men  "Until" contains a sample of "Footsteps in the Dark", as performed by The Isley Brothers  
The first detailed account of the interior construction of living tissue based on the use of a microscope did not appear until 1644, in Giambattista Odierna's "L'occhio della mosca", or "The Fly's Eye".
It was not until the 1660s and 1670s that the microscope was used extensively for research in Italy, The Netherlands and England.
Marcelo Malpighi in Italy began the analysis of biological structures beginning with the lungs.
Robert Hooke's "Micrographia" had a huge impact, largely because of its impressive illustrations.
The greatest contribution came from Antonie van Leeuwenhoek who discovered red blood cells and spermatozoa and helped popularise microscopy as a technique.
On 9 October 1676, Van Leeuwenhoek reported the discovery of micro-organisms.
In 1893 August Köhler developed a key technique for sample illumination, Köhler illumination, which is central to modern light microscopy.
This method of sample illumination gives rise to extremely even lighting and overcomes many limitations of older techniques of sample illumination.
Further developments in sample illumination came from Frits Zernike in 1953 for inventing Phase Contrast, and Georges Nomarski 1955 for his development of differential interference contrast illumination; both of which allow imaging of unstained, transparent samples.
TSP was developed for use in satellite validation benches. 
Whereas loops are usually a phrase played on a musical instrument, this type of sample is usually a single note.
Music workstations and samplers use samples of musical instruments as the basis of their own sounds, and are capable of playing a sample back at any pitch.
Many modern synthesizers and drum machines also use samples as the basis of their sounds.
(See sample-based synthesis for more information.)
Most such samples are created in professional recording studios using world-class instruments played by accomplished musicians.
These are usually developed by the manufacturer of the instrument or by a subcontractor who specializes in creating such samples.
There are businesses and individuals who create libraries of samples of musical instruments.
Of course, a sampler allows anyone to create such samples.
Possibly the earliest equipment used to sample recorded instrument sounds are the Chamberlin, which was developed in the 1940s, and its better-known cousin, the Mellotron, marketed in England in the 1960s.
Both are tape replay keyboards, in which each key pressed triggers a prerecorded tape loop of a single note.
Musicians can reproduce the same samples of break beats like the "Amen" break which was composed, produced and mastered by the Winston Brothers in 1960s.
Producers in the early 1990s have used the whole 5.66 second sample, but music workstations like the Korg Electribe Series (EM-1, ES-1; EMX-1 and the ESX-1) have used the "Amen" kick, hi hat and snare in their sound wave libraries for free use.
Sampler production companies have managed to use these samples for pitch, attack and decay and DSP effects to each drum sound.
These features allow producers to manipulate samples to match other parts of the composition.
Most sample sets consist of multiple samples at different pitches.
These are combined into keymaps, that associate each sample with a particular pitch or pitch range.
Often, these sample maps may have different layers as well, so that different velocities can trigger a different sample.
Samples used in musical instruments sometimes have a looped component.
An instrument with indefinite sustain, such as a pipe organ, does not need to be represented by a very long sample because the sustained portion of the timbre is looped.
The sampler (or other sample playback instrument) plays the attack and decay portion of the sample followed by the looped sustain portion for as long as the note is held, then plays the release portion of the sample.