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Eye‐safety analysis of current laser‐based scanned‐beam projection systems
Author(s) -
Buckley Edward
Publication year - 2010
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid18.11.944
Subject(s) - miniaturization , computer science , projection (relational algebra) , brightness , optics , laser safety , laser , reliability (semiconductor) , power (physics) , computer vision , artificial intelligence , physics , electrical engineering , engineering , algorithm , quantum mechanics
— Scanned‐beam projection systems have attracted much interest recently, with claimed advantages including power efficiency and potential miniaturization consistent with embedding in mobile devices. However, the laser‐safety classification and concomitant performance implications, which are arguably the most important issues pertaining to this technology, remain widely misunderstood. In this paper, Class 1 and 2 laser‐safety radiometric image power limits for scanned‐beam systems are derived with reference to the IEC 60825‐1 standard. By calculating the equivalent photometric measure of luminous flux, it is possible to show that the brightness limits for scanned‐beam projection systems using current technology are approximately 1 and 1 7 lm for Class 1 and 2 safety classifications, respectively.