DLPA078B February 2017 – September 2021 DLP160AP , DLP160CP , DLP2000 , DLP2010 , DLP230GP , DLP230KP , DLP230NP , DLP3010 , DLP3310 , DLP4710 , DLP471TP , DLPC3420 , DLPC3421
Throw ratio (see Figure 3-3) describes how large of a projected image an optical module creates at a given distance from the projection surface. It is defined as the ratio of D (the distance from the final optical element to the projection surface) to W (width of projected image). For pico projection applications, throw ratios typically range from around 0.3 (“ultra-short”) to 2.0 (“long”). For example:
Shorter throw ratios typically result in larger projection lenses and mirrors, and therefore larger overall optical modules.