Question:  Which physicist is associated with Photography in Luxembourg and developed a method to reproduce colors photographically based on the phenomenon of interference?

Context articles: Duratrans
Color balance
Color Quality Scale
Gabriel Lippmann
Sagnac effect
Photography in Luxembourg
Thin-film interference
Windows Color System
Fano resonance
Separation masters

Duratrans were invented by Eastman Kodak Co. in the late 1970s and trademarked in 1982, to ascribe to their newly developed large-format backlit color transparency film, by shortening the material name of Endura Transparency.
 The original duratrans film was exposed photographically and developed chemically using a similar silver halide process as conventional lab photography.
In photography and image processing, color balance is the global adjustment of the intensities of the colors (typically red, green, and blue primary colors).
 An important goal of this adjustment is to render specific colors – particularly neutral colors – correctly.
 Hence, the general method is sometimes called gray balance, neutral balance, or white balance.
 Color balance changes the overall mixture of colors in an image and is used for color correction.
 Generalized versions of color balance are used to correct colors other than neutrals or to deliberately change them for effect.
Color Quality Scale (CQS) is a color rendering index (a quantitative measure of the ability of a light source to reproduce colors of illuminated objects).
 Developed by researchers at NIST the metric aims to overcome some of the issues inherent in the widely used CIE Ra.
Jonas Ferdinand Gabriel Lippmann (16 August 1845 – 13 July 1921) was a Franco-Luxembourgish physicist and inventor, and Nobel laureate in physics for his method of reproducing colours photographically based on the phenomenon of interference.
The Sagnac effect, also called Sagnac interference, named after French physicist Georges Sagnac, is a phenomenon encountered in interferometry that is elicited by rotation.
 The Sagnac effect manifests itself in a setup called a ring interferometer.
 A beam of light is split and the two beams are made to follow the same path but in opposite directions.
 On return to the point of entry the two light beams are allowed to exit the ring and undergo interference.
 The relative phases of the two exiting beams, and thus the position of the interference fringes, are shifted according to the angular velocity of the apparatus.
 In other words, when the interferometer is at rest with respect to the earth, the light travels at a constant speed.
 However, when the interferometer system is spun, one beam of light will slow with respect to the other beam of light.
 This arrangement is also called a Sagnac interferometer.
 Georges Sagnac set up this experiment to prove the existence of the aether that Einstein's theory of special relativity had discarded.
Photography in Luxembourg is often associated with two figures who were born in Luxembourg but left when very young: Edward Steichen (1879–1973) was an American who made outstanding contributions to fashion and military photography during the first half of the 20th century; while Gabriel Lippmann (1845–1921), a Frenchman, was awarded the Nobel prize in physics for his achievements in colour photography.
 There are however many Luxembourg nationals who are remembered for recording the development of the city of Luxembourg and the country as a whole from the 1850s to the present.
Thin-film interference is a natural phenomenon in which light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.
 When the thickness of the film is an odd multiple of one quarter-wavelength of the light on it, the reflected waves from both surfaces interfere to cancel each other.
 Since the wave cannot be reflected, it is completely transmitted instead.
 When the thickness is a multiple of a half-wavelength of the light, the two reflected waves reinforce each other, increasing the reflection and reducing the transmission.
 Thus when white light, which consists of a range of wavelengths, is incident on the film, certain wavelengths (colors) are intensified while others are attenuated.
 Thin-film interference explains the multiple colors seen in light reflected from soap bubbles and oil films on water.
 It is also the mechanism behind the action of antireflection coatings used on glasses and camera lenses.
Windows Color System (WCS) is a platform for color management, first included with Windows Vista, that aims to achieve color consistency across various software and hardware, including cameras, monitors, printers and scanners.
 Different devices interpret the same colors differently, according to their software and hardware configurations.
 As a result, they must be properly calibrated to reproduce colors consistently across different devices.
 WCS aims to make this process of color calibration automatic and transparent, as an evolution of ICC profiles.
In physics, a Fano resonance is a type of resonant scattering phenomenon that gives rise to an asymmetric line-shape.
 Interference between a background and a resonant scattering process produces the asymmetric line-shape.
 It is named after Italian-American physicist Ugo Fano, who gave a theoretical explanation for the scattering line-shape of inelastic scattering of electrons from helium; however, Ettore Majorana was the first to discover this phenomenon.
 Because it is a general wave phenomenon, examples can be found across many areas of physics and engineering.
Separation masters are a method of long-term preservation for most modern color motion picture film.
 Since monopack color film - (where materials for registering all the colors of the spectrum are contained on one film - its opposite is bipack colour film where two films face each other and the lower spectrum reds and yellows are on one film and the higher spectrum greens and blues are on another film - see Technicolor three strip) used in such processes as ECN, ECP and their successive revisions - contains photographically active color couplers which remain in the film after development, the emulsion will continue to produce chemical reactions in the image which cumulatively create a color fading, usually heavily biased towards the pink spectrum.
 In order to protect against this occurrence, the technique of separation masters was created.