全息投影 需要屏幕的吗不是投影在空中,生成影像的吗?

原始象是虚像，共轭象是实像，不可能去掉其中之一。
图中的共轭光波，与照相时的参考光是共轭的，即，光的传播方向是相反的。这时看到的共轭的像是对称的虚像，即，与原来的物体左右相反，就像照镜子一样。
最好把原来的照相光路贴出来，否则不好讨论。

演唱会上所采用了一款3D全息透明屏幕来把初音给全方位显示出来.3D全息透明屏幕是一种采用了全息技术的透明投影屏幕,这种投影屏幕具有全息图像的特点,只显示来自某一特定角度的图像,而忽略其他角度的光线.即使是在环境光线很亮的地方,也能显示非常明亮、清晰的影像.也就是说,这个演唱会的关键是3D全息透明屏幕,在初音跳上舞台那一刻,无论你从哪个角度来看,你都能看到一个完整的初音.
所谓的全息投影技术,是全息摄影技术的逆向展示,本质上是通过在空气或者特殊的立体镜片上形成立体的影像.全息投影技术突破了传统声、光、电局限,空间成像色彩鲜艳,对比度、清晰度都非常高,空间感、透视感很强.不同于平面银幕投影仅仅在二维表面通过透视、阴影等效果实现立体感,全息投影技术是真正呈现3D的影像,可以从360°的任何角度观看影像的不同侧面.

全息投影技术还很不成熟,应用到手机上还实现不了

楼上的说的是全息投影,人家问的是伪全息投影,不解释了,楼主自己明白了

Holographic projection is a kind of do not need to wear glasses 3D technology, the audience can see three-dimensional virtual characters. This technique is widely used in some museum. Holographic projection device is realized by the digital technology, but the projection device will different angle image projection to import the MP holographic film, let you see not one's own perspective in the other image, thus realizing the true three-dimensional holographic images. 360 degrees of phantom imaging is a three-dimensional frame suspended in the real midair imaging, creating is also true fantasy atmosphere, unique effect, has a stronger feeling of depth, real hard. Formation of air can be combined with the real vision, image and real union. Also can be matched with a touch screen to realize the interaction with the audience. According to the requirements made four window on each side, the largest 2-4 M. Can be made into a holographic illusion stage, products stereo 360 degrees demonstration; real and unreal people perform; science and Technology Museum dream stage. Suitable for the representation of details or the internal structure of a wealth of individual items, such as cars, watches, jewelry, industrial products, can also be the performance figures, cartoon, to give the audience a feeling is fully three-dimensional.