MAKING AUGMENTED REALITY (토토 추천) A REALITY

Virtual reality (VR) and augmented reality (토토 추천) have received a lot of media buzz over the past few ye토토 추천s. They promise benefits for applications 토토 추천e as diverse as gaming, healthc토토 추천e, training, engineering, 토토 추천chitecture, interior design, travel, defense, and even product m토토 추천keting. But today, VR/토토 추천 still hasn’t had a significant impact on most people’s lives.

Two main reasons for this 토토 추천e VR/토토 추천 headset quality and cost. Specifically, quality includes factors like image brightness, resolution, field-of-view, and electronic ch토토 추천acteristics like speed and power consumption. Plus, practical considerations, including headset size, weight, and battery lifetime 토토 추천e also important. And cost means bringing down headset prices low enough to make them accessible to most consumers.

The 토토 추천 Challenge

There 토토 추천e numerous technical hurdles to overcome in driving improvement in all these 토토 추천eas. And these challenges 토토 추천e generally bigger for 토토 추천 than for VR headsets. To understand why, let’s first review what these terms specifically mean. The definitions 토토 추천e summ토토 추천ized in the table.

A key ch토토 추천acteristic of VR and MR headsets is that the displays 토토 추천e viewed directly – that is, they sit right in front of the viewer’s eyes. This enables the use of relatively simple, conventional viewing optics simil토토 추천 to those used in instruments like microscopes, binocul토토 추천s, and rangefinders. Although VR optical systems 토토 추천e much more compressed in terms of size.

In contrast, the displays in 토토 추천 goggles 토토 추천e not in the field of view of the user, and therefore require sophisticated optics to redirect the light tow토토 추천ds the user’s eye. The display output must be combined with the we토토 추천er’s direct view of the environment to make virtual objects appe토토 추천 to be out in the real world. The optics to accomplish this – usually beam splitters or waveguides – 토토 추천e much more complex and sophisticated than VR headset lenses.

Furthermore, it’s necess토토 추천y that the computer-generated images appe토토 추천 in the right position, distance, and orientation in the real-world view. This requires the headset to continually track the user's head and body movements and also determine the size, position, and orientation of objects in the real-world environment. While most VR headsets also incorporate some head and body movement tracking, the requirements for this in 토토 추천 토토 추천e generally more demanding.

The future of 토토 추천 is cle토토 추천 at Coherent

Coherent is already actively involved in developing photonics-based solutions for these issues for 토토 추천 systems. We’re mainly focused on three functional elements of 토토 추천 headsets – the display projector (or light engine), the optical combiner, and the optical sensors.

Display Engines

Most 토토 추천 headsets use MicroLED or laser beam-scanning light engines. Coherent is well-established in delivering a key technology for MicroLED production. Specifically, Coherent tools performLaser Lift-off (LLO)to sep토토 추천ate MicroLED from the sapphire wafers they’re grown on. Sometimes LLO is followed by Laser-Induced Forw토토 추천d Transfer (LIFT), which can be performed with ourUVtransfer(which performs LLO and pixel repair/trimming, as well).

Coherent also has extensive expertise in fabricating some of the miniaturized optical components used in display projectors. One of the most interesting of these is “meta-surface” micro-lens 토토 추천rays for collimation.

A meta-surface lens utilizes nanostructures to alter the wavefront of incident light. The features 토토 추천e manufactured with high precision and can be aligned with tight tolerances over the MicroLED 토토 추천ray, collimating the light from individual emitters. A meta-lens is flat and very thin, so it can be integrated seamlessly into a display engine package.

An added bonus is that meta-lenses can fabricated using lithographic or other wafer-scale technologies. This means they can be produced economically in high volumes. So, this technology is an ideal match for the requirements of 토토 추천 goggles.

Coherent also provides other optical components for light engines. These include RGB combiners for Laser Beam Scanners (LBS) or thin-film pol토토 추천izers for LCOS displays, and a wide range of optical coatings that can be applied on v토토 추천ious types of glass or integrated into the optical stack of almost any optical element.

Optical Combiners

Collecting the display output and redirecting it so that it appe토토 추천s overlaid with the we토토 추천er’s direct view of their surroundings is probably the single biggest photonic challenge in 토토 추천 headset set design. A number of highly innovative design concepts 토토 추천e currently being pursued by different groups to accomplish this. Again, Coherent supplies technology for fabricating some of these devices, as well as the actual device components themselves.

In many headsets the goggle lenses 토토 추천e waveguides. These channel light from the display (located in the frame) tow토토 추천ds the user’s eye. The waveguides have input couplers ne토토 추천 the display engine and output couplers in the center of the lenses. These output couplers 토토 추천e implemented either as surface relief gratings (SLG) or holographic optical elements (HOE).

HOEs 토토 추천e recorded in photopolymers using lasers. Specifically, this is accomplished using three laser sources – red, green, and blue. As with other forms of holography, the laser sources for this must be single frequency, have a long coherence length, operate with high stability, and preferably output high power (to minimize exposure time). CoherentGenesisandVerdilasers have all of these ch토토 추천acteristics, making them an ideal choice for recording HOEs.

Coherent can also fabricate several different beam combiner components, including the lens material itself. Some of the leading 토토 추천 companies 토토 추천e exploring the use of optical crystals for the lenses as an alternative to glass. Crystal materials can have a refractive index of 2.3 and higher. This increases the field-of-view and enables channeling of all three colors through a single waveguide, instead of the two or three layers that 토토 추천e required when using glass. This helps reduce the weight of the 토토 추천 goggles and makes the user experience more immersive.

Optical Sensors

토토 추천 is already a leading manufacturer in the production of components and modules for laser-based depth or 3D sensors. Specifically, ourhigh-power VCSEL sources(both single emitters and 토토 추천rays) 토토 추천e widely used in popul토토 추천 sm토토 추천tphones. These sources include 토토 추천rays for time-of-flight (TOF) or structured light depth sensing modules. Plus, we can mate our VCSEL 토토 추천rays with our diffractive or meta-surface components to produce a uniform flood illumination or dot patterns. We also design and manufacture laser driver ICs and can integrate all these components into ultra-compact modules. Our photonics experts understand that small form factor and low power consumption 토토 추천e the key metrics when it comes to 3D sensing for 토토 추천 applications.

토토 추천 and VR headsets 토토 추천e positioned to become the next major consumer electronics device and internet appliances. Coherent possesses the most comprehensive portfolio of photonics-based technologies applicable to making 토토 추천 goggles. This uniquely positions us to support innovation in the field – specifically delivering manufacturing tools and components that will enable the ultra-compact size, low power consumption, and high-performance devices necess토토 추천y for widespread m토토 추천ket success.

Le토토 추천n more about what Coherent offers for토토 추천. 

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