现在,越来越多的办公场合投影需要用到短焦,尤其是在一些受到空间限制的场合里要想顺利地进行演示,短焦投影机必不可少。一般的投影机通常要26～3米左右才能打出80～100寸的画面,而使用了短焦镜头的投影机,通常只需要19～23米就能够打出同等大小的画面。显而易见,短焦投影机对于空间有限的公司非常有帮助。细分来说,短焦功能的实现主要有两种原理:一种是纯粹的利用镜片的焦距技术,即直射式;而另外一种则是利用了新的光反射 Nowadays, more and more office projects require short focal length projection, especially in some space-constrained situations where smooth presentation is required, and short-throw projectors are essential. The average projector usually takes about 26 ~ 3 meters to play 80 ~ 100 inch screen, and the projector using the short-focus lens, usually only need 19 ~ 23 meters can play the same size of the screen. Obviously, short-throw projectors are very helpful for companies with limited space. Subdivision, short focus function to achieve the two main principles: one is the pure use of the focal length of the lens technology, which is the direct type; the other is the use of a new light reflection