3D objects vs. holograms

We have already mentioned that HoloLens doesn’t create holograms by itself. The so-called holograms are actually 3D objects made entirely out of light. By using Microsoft’s special goggles, these virtual 3D objects are projected onto our field of vision.

In contrast, researcher Xuewu Xu and some of his colleagues  from Data Storage Institute in Singapore succeeded in developing a method to create “real” holograms.  Engadget’s Felix Knoke shared a German article about the topic here and attempts to get a demo video from Xuewu Xu and his colleagues. Basically, they explain their approach in the following way:

hologram“We propose a new approach to spatiotemporally multiplex sub-holograms and stream hologram data in parallel by using multiple spatial light modulators (SLMs) to increase the spatiotemporal resolution of holographic display system.

With the proposed approach, we have achieved a spatiotemporal resolution of 4.5 × 1010 pixel/s, as compared with 1.89 × 109 pixel/s of a single SLM. Each frame of computer-generated hologram video has a pixel count of 378 Mpixels and is divided into 288 sub-holograms, each of 1.31 Mpixels.

During the playback of holographic video, these sub-holograms are spatiotemporally multiplexed and streamed in parallel to form the integrated hologram within 16.67 ms, which enables full-color holographic video display with a 10-in. diagonal at a hologram data frame rate of 60 frames per second (fps).

New SLM devices with higher spatiotemporal resolution need to be developed in order to meet the data bandwidth requirement of about 1012–1014 pixel/s for future 3D holographic displays.”

via So gehen Hologramme richtig – Engadget Deutschland.

Nevertheless, HoloLens offers a great possibility to blend virtual objects into our physical reality. Even if HoloLens doesn’t create holograms by definition, Microsoft avoids negative connotations connected with AR and establishes best conditions for HoloLens to be accepted by potential customers.

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