reflectographyn.
/ˌriːflɛkˈtɒɡrəfi/, /rᵻflɛkˈtɒɡrəfi/, U.S. /rəˌflɛkˈtɑɡrəfi/, /riˌflɛkˈtɑɡrəfi/ Any of various techniques for producing an image or graphical representation based on properties of reflection; spec. a technique for revealing hidden drawing lines beneath paintings using infrared scanning.
ΚΠ
1938 Photogr. Jrnl. 78 586/2 Materials for this new reflectography process.
1969 J. R. J. van Asperen de Boer in Stud. in Conservation 14 96 The author has developed a non-destructive method of examination to improve the detectability of underdrawings, which has been called infra-red reflectography, to distinguish between conventional infra-red photography and detecting systems employing a scanning process responsive to radiation up to 2·0μ.
1974 Ultrasonics 12 177/2 L. L. Morgan..proposed a method of measuring the depth of surface cracks using short broadband (1–10 MHz) Rayleigh waves... Pulse echo reflectography was used with a separate detector.
1999 N.Y. Times 24 Dec. e48/2 He called in scholars, and together they examined the painting with infrared reflectography, a method that reveals the drawing beneath the painting's surface.
2006 Vibrational Spectroscopy 41 171/1 Non-destructive analysis for identification of iron gall inks includes infrared reflectography and false colour infrared photography.
This is a new entry (OED Third Edition, September 2009; most recently modified version published online June 2022).
<
n.1938