1 April 1990 Recent advances in retroreflective security materials
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As the title of this paper suggests, there are new optical systems that may be used for security applications. Several will be discussed here, along with a new selection procedure for consideration by those who search for utilization of the most effective "security" system to meet their requirements.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Edwin A. Grant, Edwin A. Grant, } "Recent advances in retroreflective security materials", Proc. SPIE 1210, Optical Security and Anticounterfeiting Systems, (1 April 1990); doi: 10.1117/12.17918; https://doi.org/10.1117/12.17918


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