| 词条 | Throw (projector) |
| 释义 | {{no sources|date=May 2017}} In film terminology, throw is the distance between a movie projector lens and its screen. It is the distance the image is thrown onto the screen, and it has a large effect on screen size.{{explain|date=May 2017}} Home theatre installations may often have an incorrect{{explain|date=May 2017}} throw distance in the room but this can be corrected by use of a short throw lens. There are also "long throw" lenses available. A related measurement, throw ratio, is the ratio of the distance from the lens to the screen (throw) to the screen width. A larger throw ratio corresponds to a more tightly focused optical system. Throw Ratio = D / W 1 : Projectors |
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