PLASA Photometric Standard in Public Review

21 August 2012

USA - ANSI E1.35 - 2007, Standard for Lens Quality Measurements for Pattern Projecting Luminaires Intended for Entertainment Use, is being revised to increase the accuracy of the measurement procedure while still keeping it simple. The draft of the revised standard is available for free download and comment through 8 October at http://tsp.plasa.org/tsp/documents/public_review_docs.php.

E1.35 describes a method that uses a projected gobo image for measuring stage and studio luminaire lens quality, with particular emphasis on quantifying contrast and perceived image quality (sharpness). It also offers a way for presenting these results on a datasheet in a format that is readily understood by a typical end-user. It's a simple way of saying, "This lens is sharper than that lens."

(Jim Evans)

 

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Standard revised simple E1.35 image lens quality way

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