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2012, Applied Optics
SHS web of conference, vol. 15, 00005 (2015) edited by B. Barberis, F. Lattarulo, P. Di Lazzaro, D. Petri.
Shroud like coloration of linen, conservation measures and perception of patterns onto the Shroud of Turin2015 •
We present new experimental results on ultraviolet laser processing of linen fabrics that complete and update the previous studies at the ENEA Research Centre of Frascati seeking a coloration mechanism able to reproduce the microscopic complexity of the body images embedded onto the Shroud of Turin. The achievement of a Shroud-like coloration of linens by using vacuum ultraviolet light pulses allowed to recognize the main photochemical reactions possibly involved in the coloration process. The identification of these reactions offered hints for long-term conservation measures of the body images on the Shroud of Turin. Finally, we discuss how image processing of photographs of the Shroud may cause misleading effects, which led some researchers to perceive, e.g., inscriptions and a second face on the backside of the cloth, which are unlikely to be on the Shroud, confirming that there is a narrow boundary between image enhancement and manipulation.
Journal of Imaging Science and Technology
Deep Ultraviolet Radiation Simulates the Turin Shroud ImageEnergia Ambiente Innovazione Special issue on conservation of cultural heritage, pp. 89-94
THE CONSERVATION OF THE SHROUD OF TURIN: OPTICAL STUDIES2012 •
The ancient linen cloth of the Shroud of Turin is one of the most studied archaeological objects in history, mainly because of the unexplained nature of its image. We have recently irradiated linen fabrics by excimer laser pulses obtaining a Shroud-like coloration, nd have recognized photo-chemical processes that may have played a role in the formation of the image embedded into the Shroud. Our results suggest some actions aimed at a long-term conservation of the Shroud and of its image
2008 •
2000 •
The faint body image embedded into the Turin Shroud has not yet explained by science. We present experimental results of excimer laser irradiation (wavelengths 308 nm and 193 nm) of a raw linen fabric and of a linen cloth, seeking for a possible mechanism of image formation. We achieved a permanent coloration of both linens as a threshold effect of
Applied Optics vol. 57, pp. 6626-6631
Investigating the color of the blood stains on archaeological cloths: the case of the Shroud of Turin2018 •
The unique reddish blood stains on the archaeological cloth known as the Shroud of Turin caught the attention of several scholars, who proposed different hypotheses to explain the unusual blood color. To date, just few hypotheses have been tested experimentally, and the results are debatable. In this paper we test the strength of two hypotheses (namely, the presence of carboxyhemoglobin and the long term influence of ultraviolet light on high-bilirubin blood) by the spectral reflectance of the blood stain regions on the Shroud and by color analyses of ultraviolet irradiated high-bilirubin blood stains on linen. The relevance of these simple methods to the study of stained textiles is discussed.
SPIE Proceedings HPLS&A
Influence of ultraviolet radiation on the color of blood stains embedded in the archaeological textile known as the Shroud of Turin2019 •
The archaeological cloth known as the Shroud of Turin is a controversial object for both scientific and religious reasons. After a brief introduction on the scientific data about the age of the cloth and the microscopic complexity of the images embedded on it, we discuss the unique reddish color of blood stains on the Shroud, which caught the attention of several scholars in the last decades. Various hypotheses were proposed to explain the blood stains reddish color, and the experimental tests produced uncertain results because data were not sufficient or were obtained in vitro. We have tested the strength of two hypotheses, namely, the long term influence of ultraviolet (UV) light on high-bilirubin blood and the presence of carboxyhemoglobin, respectively by RGB color analyses of high-bilirubin blood after irradiation by ns excimer laser pulses and UV lamp and by the study of the spectral reflectance of the blood stains on the Shroud.
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Proceedings of the Conference “FIAT LUX – Let there be Light”, E. Fazio and R. Pascual, eds., Nova Science Publishers (Hauppauge, NY). http://www.fiatluxconference.com/
A Ray of Light on the Shroud of TurinIEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 10, No. 6, 1435 (2004)
Point Defects in Lithium Fluoride by EUV and Soft X-Rays Exposure for X-Ray Microscopy and Optical ApplicationsProc. SPIE 3423, Second GR-I International Conference on New Laser Technologies and Applications, 35 (July 14, 1998); doi:10.1117/12.316586
Hercules: an XeCl excimer laser facility for high-intensity irradiation experiments1998 •
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Microscopic and macroscopic characteristics of the Shroud of Turin image superficiality2010 •
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Pirenoxine prevents oxidative effects of argon fluoride excimer laser irradiation in rabbit corneas: biochemical, histological and cytofluorimetric evaluations2005 •
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Optics and Lasers in Engineering
Recent developments on microablation of glass materials using excimer lasers2007 •
Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2013
Laser removal of mold and foxing stains from paper artifacts: preliminary investigation2013 •
Spectrochimica Acta Part B: Atomic Spectroscopy
Soft X-ray imaging by optically stimulated luminescence from color centers in lithium fluoride2007 •
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Femtosecond and ultraviolet laser irradiation of graphitelike hexagonal boron nitride2004 •
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