The new 3D lens aims to solve many augmented reality display problems

The new 3D lens aims to solve many augmented reality display problems

Photo: Kryal

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Swiss startup Creal is developing an AR lens that should offer significant advantages over existing AR optical systems. New video explaining its function.

The lens is one of the essential components of transparent augmented reality headsets. Called “complexes” in technical jargon, they combine natural and digital light for believable augmented reality.

Ideally, AR lenses should meet the full range of requirements:

  • It should be transparent in both directions,
  • Does not produce artifacts (such as rainbow effect),
  • Allows high-quality, bright and energy-efficient 3D graphics,
  • vision correction support,
  • Fits a slim AR headset,
  • And it is inexpensive to produce.

The most common combination is waveguides, which are used in Hololens 1 and 2 and Magic Leap 1 and 2, among others.

Creal Evolution 3D AR Lens

Swiss startup Creal (pronounced “see-real”) is based on a different type of ROM, called HOEs (3D visual elements“).

“The HOE is essentially a thin film – comparable to a human hair – that allows all visible light to pass through it without any effects while reflecting one or more specific colors in the desired way. Thus, HOEs forAR are completely transparent to almost all real world light but reflect almost all The light projected by the display (which should only use those few specific colors that interact with the HOE, of course).The physical concept of HOEs is very simple, they are very energy-saving, low-cost and can be directly integrated into the traditional prescription lens.

Kryal writes in september white paper.

HOE development began in January 2021 at the company’s Holographic Laboratory. by summer, First, the working lens model Featured, it delivers high quality 3D visuals and supports Creal’s light field technology, which can simulate different depth levels of AR elements.

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Creal’s AR Lens: HMD’s First Prototype Coming in 2023

The HOE Uniform is not an innovation. Sony, Intel, and North have already developed and used them for AR devices. The sub-gender of the holographic lens could also play an important role for VR headsets in the future (see Meta Mirror Lake Model).

What makes the new HOE collector from Creal special is that Supports company’s proprietary light field technology It addresses the biggest drawback of previous HOEs: the small eye square, or the area in which holograms are displayed in the eye.

Tabelle, Die verschiedene optische AR-Systeme vergleicht.

In the white paper, Creal compares the advantages and disadvantages of different augmented reality systems. Creal’s light-field HOE is shown in the center, with waveguides on the right. | Photo: Kryal

While the AR 3D lens is new, Creal has been working on its own light field technology for many years and has already introduced several VR and AR models.

Creal’s light field representation mimics the behavior of natural light. So the focal planes are already included in the image information and do not need to be simulated separately (See this explanation). This allows the eye to focus naturally, which resolves The conflict between vergence and housing.

The video above from September 2022 shows how the technology works using the latest augmented reality prototype as an example. note the Focal shift between foreground and background Depending on what the camera is focusing on: once in 3D and hands, once in the background.

Creal’s new HOE lens is not in action here: According to Creal, it will be integrated into a new h.eadset model with light field display in early 2023.


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