Optical recording in the mid-IR in photochromic polymers

Victor Weiss; Asher A. Friesem; Valeri Krongauz

doi:10.1117/12.151088

13 August 1993 Optical recording in the mid-IR in photochromic polymers

Victor Weiss, Asher A. Friesem, Valeri Krongauz

Proceedings Volume 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine; (1993) https://doi.org/10.1117/12.151088
Event: 8th Meeting in Israel on Optical Engineering, 1992, Tel Aviv, Israel

Abstract

Real-time recording of mid-infrared laser radiation in photochromic spiropyran-MMA copolymer materials is investigated. The laser radiation, derived from a CO₂ laser, bleached pre-colored merocyanine, thereby converting it back to spiropyran. The exposure sensitivity at 50 percent of the initial merocyanine optical density was about 0.1 J/mm² at 10.6 micrometers laser wavelength and 0.2 J/mm² at 10.5 micrometers . The difference of sensitivity at the two laser wavelengths points to differences in thermal energy dissipation mechanisms. The characteristics and examples of imagery, recorded in these photochromics, are presented. A resolution equal or better than 40 lines/mm was achieved.

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Victor Weiss, Asher A. Friesem, and Valeri Krongauz "Optical recording in the mid-IR in photochromic polymers", Proc. SPIE 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine, (13 August 1993); https://doi.org/10.1117/12.151088

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