Abstract

Infrared sensitization of photographic emulsion response to visible light is a useful technique for visualizing IR laser beams. In this work, it is demonstrated that this sensitization results from heating by the IR beam. Investigation of the dependence of sensitization by pulsed CO₂ laser (10.6-μm) preexposures on visible background density, IR fluence, visible wavelength, delay between exposures, and spatial frequency are described. Infrared fluences as low as 10 mJ/cm², a dynamic range greater than 100, and a resolution better than 50 lines/mm were observed. Suggestions for further improvements of the technique are made.

© 1981 Optical Society of America

Nanosecond photography at 10.6 μm using silver halide film

G. R. Mitchel, B. Grek, T. W. Johnston, F. Martin, and H. Pépin
Appl. Opt. 18(14) 2422-2426 (1979)

Response of standard silver halide emulsions to mid-infrared radiation

Juan Manuel Meza and Sergio Calixto
Appl. Opt. 35(31) 6140-6145 (1996)

Silver halide sensitized gelatin derived from BB-640 holographic emulsion

Cristian Neipp, Inmaculada Pascual, and Augusto Beléndez
Appl. Opt. 38(8) 1348-1356 (1999)

Recording of interferograms on normal high resolution plates using a CO₂ laser at 10.6 μm

D. P. Juyal, S. P. Gupta, and R. Hradaynath
Appl. Opt. 22(14) 2152-2154 (1983)

Holographic optical elements recorded in silver halide sensitized gelatin emulsions. Part 2. Reflection holographic optical elements

Jong Man Kim, Byung So Choi, Yoon Sun Choi, Jong Min Kim, Hans I. Bjelkhagen, and Nicholas J. Phillips
Appl. Opt. 41(8) 1522-1533 (2002)