机械电视——用尼普科夫圆盘加一只灯泡，靠视觉暂留拼出图像的那种——原理不难理解。可要把这套技术搬进第三维？这就有点烧脑了。好在 AncientJames 用一段直观的视觉演示说明了其中的机关。
他没有用做逐行扫描的圆盘，而是用一只高速旋转、打了孔的鼓。取代单只灯泡的是一组 LED 点阵屏，每块分辨率 32×64 像素。关键在于把模型拆成一个光场，让每个孔在正确的角度投射出物体各自的那一份图像。
这次的演示用了三块点阵屏，但它们排列成六棱柱的一半，因此视角受限——要做到完整 360 度需要更多屏幕。透过鼓看到的等效分辨率只有每眼约 100×48 像素，不过这已经足够跑《DOOM》了。
这不是这位 Ancient 第一次把《DOOM》跑在体积显示上，参考他此前的成果（雾镜激光多视角 3D 投影、激光加气泡玻璃的体积显示），大概也不会是最后一次。而这一版实现让显示屏保持静止、也不需要昂贵的激光投影器，看起来是最容易复现的一种——只要注意别伤到手指。
本文来源：https://hackaday.com/2026-09-29/electromechanical-tv-goes-3d-with-this-light-field-display/
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Mechanical television—using a Nipkow disk plus a light bulb, relying on persistence of vision to piece together images—has a principle that is not hard to understand. But putting this technology into the third dimension? That is a bit mind-bending. Fortunately, AncientJames uses an intuitive visual demonstration to explain the trick.
He did not use a disk for line-by-line scanning; instead he used a high-speed rotating drum with holes. In place of a single light bulb is a set of LED dot-matrix screens, each with a resolution of 32×64 pixels. The key is to decompose the model into a light field, letting each hole project the object's respective part of the image at the correct angle.
This demonstration used three dot-matrix screens, but they are arranged as half of a hexagonal prism, so the viewing angle is limited—achieving a full 360 degrees would require more screens. The equivalent resolution seen through the drum is only about 100×48 pixels per eye, but this is already enough to run DOOM.
This is not the first time this Ancient has run DOOM on a volumetric display; referring to his earlier results (fog-mirror laser multi-view 3D projection, laser-plus-bubble-glass volumetric display), it probably will not be the last either. And this implementation keeps the display stationary and does not require an expensive laser projector, making it look like the easiest version to replicate—just take care not to hurt your fingers.