Dr. Alexander J. Kossolapov Profile

Dr. Alexander J. Kossolapov

at State Hermitage Museum

SPIE Involvement:

Author

Proceedings Article | 11 March 2011 Paper

X-ray image analysis of Lorenzo Lotto's Husband and wife

David Stork, Alexander Kossolapov

Proceedings Volume 7869, 78690L (2011) https://doi.org/10.1117/12.873191

KEYWORDS: Projection systems, X-rays, Mirrors, X-ray imaging, Image analysis, Visualization, Cameras, Image processing, Lenses, Digital image processing

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Underdrawings and pentimenti reveal intermediate states of a painting and thus may shed light on the working methods of some artists. It has been claimed that Lorenzo Lotto used optical projections during the execution of Husband and wife (1543) and, recently, that underdrawings in that work might reveal evidence of tracing of optical projections. We analyze x-ray images of this painting-captured under careful, museum-laboratory conditions and enhanced through digital image processing-with special attention to the possibility of evidence of the use of optical projections in the central passage of the depicted carpet. We also study the work in situ and in high-resolution macro optical images of the central portion of the carpet pattern. These photographs reveal that the top portion of the keyhole pattern is not "blurry, like an out-of-focus image," but instead was merely executed in a somewhat broader brush than was neighboring passages. Furthermore, x-ray, infra-red and visible light inspection show that the white portions and black contours were executed atop a broad layer of dark red and reveal no record of an optical projection would have been present when Lotto executed the visible portion. As such, an evidence of putative underdrawings in this region has no bearing on the optical projection claim. There is no evidence of tracing marks-in charcoal or in any medium-in the top, visible portion of this passage either. As such, this visual, infra-red and x-ray evidence does not support the claim that this painting was executed under optical projections. We also discuss the difficulties with the projection theory with special reference to Lotto's preparatory drawing in the Rijksmuseum-specifically the need for a needlessly complex optical system (two lenses rather than one). We also review briefly contemporary textual evidence in early 16th-century Venice that has been used to support the optical projection claim for Lotto and conclude that it also fails to support the projection claim for this painting.

Proceedings Article | 25 May 1998 Paper

Helium radiogenic clock for dating of archaeological gold

Alexander Kossolapov, Alexander Ivanov, Pavel Kuznetsov

Proceedings Volume 3315, (1998) https://doi.org/10.1117/12.308588

KEYWORDS: Gold, Metals, Helium, Manufacturing, Chemical species, Clocks, Corrosion, Magnesium, Statistical analysis, Diffusion

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Proceedings Article | 25 May 1998 Paper

Using Kodak DCS460IR digital camera in the museum

Alexander Kossolapov, Alexander Sizov

Proceedings Volume 3315, (1998) https://doi.org/10.1117/12.308586

KEYWORDS: Cameras, Photography, Optical filters, CCD cameras, Radiography, Digital cameras, Visualization, Luminescence, X-rays, Ultraviolet radiation

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Conference Committee Involvement (8)

Optics for Arts, Architecture, and Archaeology (O3A) VIII

21 June 2021 | Online Only, Germany

Optics for Arts, Architecture, and Archaeology VII

24 June 2019 | Munich, Germany

O3A: Optics for Art, Architecture, and Archaeology

28 June 2017 | Munich, Germany

Optics for Arts, Architecture, and Archaeology V

24 June 2015 | Munich, Germany

Optics for Arts, Architecture, and Archaeology IV

15 May 2013 | Munich, Germany

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