Tillämpningen av modern teknik är ett viktigt genombrott i det globala kulturarvskonserveringen . Bland dessa har laserrengöringsteknik för kulturella reliker, med dess icke-kontakt, högprecision och miljövänliga egenskaper, blivit ett revolutionerande verktyg inom området kulturella kulturarv .}}}}}}}}}}}}}
01 Principer och utveckling av laserrengöringsteknik
Laserrengöringsteknologi använder de fototermiska eller fotomekaniska effekterna som genereras av interaktionen mellan laserstrålar och material för att uppnå icke-kontaktrengöring genom att selektivt ta bort föroreningar från materiella ytor . dess kärnprincip kan sammanfattas som "selektiva fototermiska effekter," Betydelse att olika material uppvisar signifikanta skillnader i deras absorpering för specifika laser) av 2) med 2)) Precis styrande laservåglängd, energitäthet och pulsfrekvens är det möjligt att uppnå exakt avlägsnande av föroreningar utan att skada själva kulturell reliken .
På 1970 -talet föreslog amerikanska forskare som Asums att lasrar skulle kunna användas för att rengöra gamla väggmålningar och skulpturer och genomförde en serie rengöringsexperiment på härdade ytföroreningar på stenytor i Venedig, därmed initiera tillämpningen av laserrengöringsteknik inom området kulturella kulturarv. the conservation of stone cultural relics. Part of the sculptures at world-famous historical sites such as Amiens Cathedral in France, Cologne Cathedral in Germany, and St. Stephen's Cathedral in Austria have been restored to their former glory through laser cleaning technology.
After over 30 years of development, modern laser cleaning technology has achieved a technical leap from nanosecond to femtosecond ultra-short pulses, with cleaning precision reaching the micrometer level. Compared to traditional cleaning methods, laser cleaning offers revolutionary advantages: non-contact operation avoids physical friction damage, sub-micrometer precision is suitable for cleaning complex patterns, no chemical residue effectively prevents Sekundär skada, och rengöringsprocessen kan övervakas i realtid . Dessa egenskaper gör det till "precisionskalan" av modernt kulturarvskonservering .
Since the year 2000, laser cleaning technology has seen numerous successful applications in the field of cultural heritage preservation. Among these, the femtosecond laser system developed by the Institute of Electronic Structure and Laser at the Greek Foundation for Research and Technology successfully removed stubborn crusts from marble components on the Acropolis of Athens. It has since completed cleaning projects on the wall sculptures of the Parthenon on the Acropolis, the frieze sculptures of the Wingless Victory Temple, and the roof of the portico of the Caryatid Hall of the Erechtheion Temple. Additionally, the mobile laser equipment from Italian company OPTO has been widely applied in the conservation of Pompeii's wall paintings, and the British Museum has established a comprehensive database of laser cleaning Parametrar ... Laserrengöringsteknik har nu blivit ett viktigt tekniskt verktyg inom det globala kulturarvskonserveringsfältet .
02 Det optimala valet balanserar säkerhet och effektivitet
At the Erechtheion Temple on the Acropolis of Athens, six caryatid columns bearing over 2,400 years of history were once severely threatened by black crust erosion. These marble sculptures had undergone three restorations. However, sulfur deposits caused by increased industrialization in Athens during the 1950s led to their surfaces being covered by a dense black crust, gradually obscuring their details. In 2010, the Acropolis Museum collaborated with a team from the Greek Institute of Electronic Structure and Laser to innovatively adopt a dual-wavelength laser combination technology using 1064nm infrared and 355nm ultraviolet lasers to precisely peel off pollutants in layers. The infrared laser reduced the thickness of the black Skorpa, medan den ultravioletta lasern avlägsnade restpartiklar och undviker skadan på marmor orsakade av traditionella rengöringsmetoder och på ett smart att undvika risken för att basmaterialet blir gult .
The Diocletian's Palace in Split, Croatia, has a history of over 1,700 years, featuring 16 towers and four palace gates. The two 11-meter-wide arched colonnades at the palace's center attract visitors from around the world to stop and admire. However, its iconic milky-white arches and columns have darkened over time. From the late 19th century to the mid-20th century, industrial smoke and dust from nearby areas further obscured the building's unique style and decorative elements, with some areas accumulating layers of dirt up to several centimeters thick. The excessive buildup of deposits made traditional cleaning methods highly prone to damaging the building's structure, leading to the loss of cultural relic details. Starting in 2010, local cultural heritage preservers pioneered the use of laser cleaning technology to "remove millennia of dust" from this 4th-century Roman palace. This marked Europe's first large-scale laser cleaning project for stone structures, spanning a decade and demonstrating the technology's advantages in complex environments.
In 2012, the Louvre Museum in France exhibited Leonardo da Vinci's masterpiece "The Virgin and Child with Saint Anne," whose surface had been cleaned using laser technology. The three figures in the painting were "liberated" from their dull, gloomy tones. Laser technology precisely removed contaminants, restoring the painting's delicate tonal layers, making it a classic case study I oljemålning Restaurering .
The murals in the "Mysterious Villa" of Pompeii, Italy, were discolored due to volcanic ash coverage. Laser technology penetrated the surface impurities, restoring the murals' original vibrant colors without damaging the pigments. This approach was evaluated by Italian cultural heritage protection authorities as "the best choice balancing safety and effectiveness."
03 Teknologiska genombrott och globalt samarbete
Despite the significant advantages of laser cleaning technology, its application still faces challenges. In terms of material adaptability, different materials exhibit varying responses after laser cleaning. For example, while laser cleaning of stone artifacts is well-established in Europe, it causes yellowing when applied to Chinese white marble.
In September 2020, under the guidance of the Ministry of Science and Technology and the recommendation of the Ministry of Culture and Tourism, the "China-Greece Cultural Heritage Conservation Technology 'Belt and Road' Joint Laboratory," jointly applied for by the Palace Museum of China and the Greek Institute of Electronic Structure and Laser under the Hellenic Foundation for Research and Technology, was officially approved for construction, pioneering a new model of cultural heritage conservation innovation under the "Belt and Road" framework. The Chinese-Greek team tackled this technical challenge by adjusting multi-wavelength combinations or using auxiliary reagents. They employed ultra-short pulse (picosecond laser) technology to minimize thermal effects and prevent damage to the base material.
In addition, the lack of standardization is a major challenge in the promotion of laser cleaning technology. Different cultural relics require customized parameters to enable practical operations by various departments. The laser holographic speckle interferometry device jointly developed by Shanghai University and the Greek IESL can detect subsurface micro-cracks in cultural relics, providing quantitative evidence for disease varning .
Currently, various modern technologies are developing rapidly, and the integration of laser cleaning with other technologies is an important trend. In the Pompeii project in Italy, the combination of laser and hyperspectral imaging technology not only makes the restoration process quantifiable and traceable but also establishes a "diagnosis-restoration-monitoring" full-process management system, providing a model for technological collaboration and injecting Teknologisk momentum i arv och främjande av kulturarv .
Laser cleaning technology transcends time and space, serving as a bridge for dialogue between Eastern and Western civilizations. Cultural heritage protection is not only a technical issue but also a practice of civilizational exchange. In the future, with the intelligentization of technology and the globalization of collaboration, laser cleaning technology will undoubtedly inject more wisdom and strength into the sustainable inheritance of human cultural arv .
