Color-coordinate system from a 13th-century account of rainbows

Smithson, Hannah E.; Anderson, P. S.; Dinkova-Bruun, Greti; Fosbury, R. A. E.; Gasper, Giles E. M.; Laven, Philip; McLeish, Tom; Panti, Cecilia; Tanner, B. K.

doi:10.1364/josaa.31.00a341

Cited by 11 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was done by extending a recent study that one of us (SG) did on current color naming for the Persian language . As shown also in other recent reconstructions of colors in historical texts, such identifications may provide important insights in the historical development of color theory. By using results from an experiment with modern observers, we assume that color coordinates identified by modern observers from Iran correspond to the colors al‐Tusi was refering to ∼750 years ago.…”

Section: Introductionmentioning

confidence: 53%

An attempt to reconstruct the meaning of al‐Tusi's color words

Kirchner¹,

Kandi

Saeedi

2015

Color Research & Application

View full text Add to dashboard Cite

In a text dating between 1259 and 1277, the Persian scholar al‐Tusi presented a systematic arrangement of 26 color terms. We propose a reconstruction of all color terms from al‐Tusi's scheme, in terms of preferred translation, mean CIEL*a*b* coordinates and digital representation. This reconstruction is based on a visual experiment with 30 subjects, who identified the Munsell chip best representing each color term. Persian words for which the meaning changed since the time of al‐Tusi were substituted by direct translations. The results show considerable interobserver variability in the colors selected when identifying color terms. This relatively large variation was shown to be a characteristic for memory matching experiments in general. Several specific color terms for which the resulting color variation was particularly large are discussed in more detail, and possible explanations for these variations are proposed. The proposed reconstruction suggests that al‐Tusi's list is largely consistent in modern colorimetric terms, although some large hue shifts are observed for color terms corresponding to green. We found no evidence for blue‐green (“grue”) confusion. © 2015 Wiley Periodicals, Inc. Col Res Appl, 41, 206–216, 2016

show abstract

Section: Introductionmentioning

confidence: 53%

An attempt to reconstruct the meaning of al‐Tusi's color words

Kirchner¹,

Kandi

Saeedi

2015

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…Surprisingly, this was indeed achieved. Examples include development of new computational methodology to overcome the challenge of modelling the creation of the perfected spheres in De luce [28], development of ray tracing to study of refraction in materials with little symmetry [23] and simulation of rainbows produced under different conditions of drop size and spectral characteristics using Mie theory [33]. What was completely unanticipated was the creative stimulus given to the practitioner artists which arose from their collaboration in the project including active engagement in Ordered Universe reading symposia and other knowledge-exchange workshops.…”

Section: Discussionmentioning

confidence: 99%

“…Colin Rennie's glass dish, shown in Fig. 9, was inspired by the colour-space spirals corresponding to variations in rainbow colour [33] and contains three orthogonal coloured spirals, created sequentially by picking up the ball of viscous glass in three orthogonal directions and trailing thin spiral lines of coloured glass in each direction. The final piece was then spun out to a bowl form before cooling.…”

Section: The Ordered-universe Project and The Response Of Creative Artistsmentioning

confidence: 99%

Robert Grosseteste: A Medieval Thinker With a Legacy for Modern Science

Tanner

2021

SCIENZE

Self Cite

View full text Add to dashboard Cite

Robert Grosseteste (ca. 1170-1253) was one of the first scholars to embed the newly rediscovered ideas of Aristotle into medieval natural philosophy. In a series of short scientific treatises written between about 1215 and 1230 he focused on explaining why, rather than how, the natural world behaves as it does. He adopted a principle of subalternation in which complex phenomena could be understood in terms of simpler underlying behaviour that could be tested by observation. For example, he explained the features of the rainbow in terms of optics, which in turn could be explained by geometry. Grosseteste’s “Big Bang” theory of the formation of the universe, based on the expansion of light from a point, is founded on the need to explain the stability of solid matter. Although surviving manuscripts do contain almost no diagrams, it is evident that he thought both mathematically and pictorially in developing a unified model of natural phenomena. In a unique interdisciplinary collaboration between historians, philosophers, palaeographers, linguists, artists and scientists (www.ordered-universe.com) we have shown how detailed examination of Grosseteste’s science can stimulate both new contemporary scientific research and artistic creativity.

show abstract

“…In Figure 2b, the scattering, absorption, and extinction efficiencies of the graphite are plotted against the relevant wavelength range. These data are calculated based upon the Mie scattering theory [32] using the MiePlot software [33], which has been successfully employed to calculate various scattering properties in a number of published works [34][35][36] by using the algorithm of Bohren and Huffman [37]. In order to perform the Mie scattering calculations, the particle size and refractive index must be known.…”

Section: Methodsmentioning

confidence: 99%

Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications

Caratenuto

Zheng

2021

Materials

View full text Add to dashboard Cite

This study introduces a movable piston-like structure that provides a simple and cost-effective avenue for dynamically tuning thermal radiation. This structure leverages two materials with dissimilar optical responses—graphite and aluminum—to modulate from a state of high reflectance to a state of high absorptance. A cavity is created in the graphite to house an aluminum cylinder, which is displaced to actuate the device. In its raised state, the large aluminum surface area promotes a highly reflective response, while in its lowered state, the expanded graphite surface area and blackbody cavity-like interactions significantly enhance absorptance. By optimizing the area ratio, reflectance tunability of over 30% is achieved for nearly the entire ultraviolet, visible, and near-infrared wavelength regions. Furthermore, a theoretical analysis postulates wavelength-dependent effectivenesses as high as 0.70 for this method, indicating that tunabilities approaching 70% can be achieved by exploiting near-ideal absorbers and reflectors. The analog nature of this control method allows for an infinitely variable optical response between the upper and lower bounds of the device. These valuable characteristics would enable this material structure to serve practical applications, such as reducing cost and energy requirements for environmental temperature management operations.

show abstract

Color-coordinate system from a 13th-century account of rainbows

Cited by 11 publications

References 16 publications

An attempt to reconstruct the meaning of al‐Tusi's color words

An attempt to reconstruct the meaning of al‐Tusi's color words

Robert Grosseteste: A Medieval Thinker With a Legacy for Modern Science

Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications

Contact Info

Product

Resources

About