1 May 1990 DCG recording with red light: discovery of a new electron-donor system
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Proceedings Volume 1212, Practical Holography IV; (1990) https://doi.org/10.1117/12.18002
Event: OE/LASE '90, 1990, Los Angeles, CA, United States
Bright and scatter-free reflection holograms of about 4 cm. diameter can now be made in DCG using a 10mw HeNe laser and a one minute exposure. This breakthrough in DCG technology comes from the discovery of a new electron donor compound (tetramethylguanidine) used in conjunction with methylene blue. Other dyes will allow much greater sensitivity to green light than normally exists in DCG. This can lead to both easier fabrication of HOE's and full color DCG holograms. Furthermore, the high alkalinity of the system allows the unexposed coated material to have an effective lifetime at room temperature of weeks rather than hours. It has a much lower quantity of hexavalent chromium than normal unexposed DCG, thus making its toxicity comparatively much lower.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeff Blyth, Jeff Blyth, } "DCG recording with red light: discovery of a new electron-donor system", Proc. SPIE 1212, Practical Holography IV, (1 May 1990); doi: 10.1117/12.18002; https://doi.org/10.1117/12.18002

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