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  • Vhiktor

    veterán

    válasz BIGi75 #55015 üzenetére

    Előtét szűrő arra való, hogy lehatjva a lencse előtt méred.
    Egyébként is a lencse elött mérve adják meg ezeket.

    Measuring screen gain is simple and inexpensive if you have a reference material. Tape a small piece of the reference to your screen, light it with the PJ, measure the reflected light of each with a spot-lightmeter, then calculate the gain. Stewart Filmscreen samples are probably accurate as far as gain rating.

    nits = candela/m^2 (area over which candela are measured)

    SG = screen gain

    lux = (projector lumen output)/(screen area in m^2)

    (lux * SG)/pi = nits

    SG = (pi * nits)/lux

    SO there you go. If you know how many lumens your projector puts out, and you can measure candela, then you can figure out the SG for one point (one specific angle). Do that multiple times for many different angles, and you can figure out the actual SG for your screen.

    ISF Kalibrátor. Tv, projektor, monitor KALIBRÁLÁS PROFESSZIONÁLIS szinten Film Stúdióknak is. Spectrophotometer + Colorimeter! Bit perfect minta generátorral(YUV, RGB) web: tokeleteskep.wixsite.com/kalibralas █Profi megjelenítő tesztelés: https://www.youtube.com/c/tokeleteskep █ Klein K10A

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