Following the collaboration between NVIDIA and Stanford UniversityUltra-thin VR glasses with a thickness of only 2.5mmMeta is also currently working with Stanford University to create a thickUltra-thin VR display prototype, only 3 mm, using holographic projection technology and publishing the relevant design in the scientific journal Nature Photonics, in order to change the current VR devices that are bulky and difficult to wear.
Currently, mainstream VR headsets rely on microdisplays, traditional optical lenses, and lens modules, making overall size difficult to reduce. Both wearing comfort and long-term user experience still leave much room for improvement. Meta, in collaboration with a Stanford University research team, has developed a holographic projection prototype that utilizes a different design philosophy, attempting to fundamentally simplify the structure and significantly reduce the thickness of the device.
The research indicates that this design primarily combines RGB micro-laser projectors, fiber optic waveguide technology, and MEMS micro-lenses. Light is then directed to a spatial light modulator (SLM) to generate a holographic pattern, ultimately forming a virtual image. Unlike traditional imaging methods that use physical lenses, holographic projection technology uses the principle of interference to generate images. Therefore, it eliminates the need for heavy lenses to adjust focus, allowing for a thinner and lighter device design.
The research team has successfully achieved a 38-degree viewing angle in their prototype, expanding the comfortable viewing area to 9 x 8 mm. This means users will experience a more natural and stable visual experience. Holographic projection also avoids the "visual focus inconsistency" common in traditional VR devices—the mismatch between the depth of virtual objects and the focus of the eye, which can cause eye fatigue or dizziness. This helps enhance immersion and ensures long-term wear comfort.
However, while this technological prototype is exciting, many challenges remain before it can be practically applied in the consumer market. For example, the spatial light modulator (SLM) itself needs to possess extremely high resolution and instant response speed to cope with complex visual content. Furthermore, the integration and miniaturization of the laser light source and fiber waveguide module remain difficult, and fitting them into a pair of glasses-sized devices presents significant hardware design challenges.
In addition, the stability and manufacturing yield of MEMS micro-lenses will also affect the subsequent commercialization process.
Meta's past aggressive acquisitions of optical and display technology companies, investments in XR research institutions, and current collaborations with academic institutions exploring holographic projection applications demonstrate its commitment to the next generation of VR devices. In the long term, if this ultra-thin design can be successfully commercialized, it has the potential to break away from the current perception of VR headsets as bulky and unwieldy, gradually moving towards lighter, glasses-like designs, further integrating with the development trend of augmented reality (AR) devices.
Currently, this technology is still in the laboratory stage, with no specific timeline for commercialization. However, with the continued advancement of microdisplays, optical components, chips, and manufacturing technologies, related applications may gradually mature in the next few years, bringing new possibilities to consumer virtual devices.
