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News 博视 Company News 博视 Quantizability of facial recognition and fingerprint recognition
Quantizability of facial recognition and fingerprint recognition

2023 . 03 . 17

Source:长春博视光电

With the rise of electronic games, entertainment, and online conferences, augmented reality technology has been widely applied in the creative industry. Especially after the outbreak of COVID-19, online conferences and online courses with social networks in education, medicine, industry and other fields have developed rapidly, providing a broad prospect for the application of AR glasses.

Meanwhile, optical system testing: Thanks to the optical waveguide devices in micro displays and AR glasses, AR technology is constantly evolving, resulting in better image quality and lighter weight for wearable devices. Smart glasses and other augmented reality wearable devices enable users to see images generated by virtual worlds.

With the breakthrough of AR in mobile technology, capital investment in the market has promoted the research and mass production of different AR glasses. In the consumer market, we can see that new products are constantly being released. AR glasses original equipment manufacturers need to compare the specifications of each product horizontally, and they are also interested in knowing the nominal parameters of imaging quality for similar products.



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We have heard that in many cases AR glasses are needed to measure Eyebox, line of sight, FOV, and image distortion, as customers want to verify their product specifications and understand whether the DOE provided by the supplier can meet the imaging effect provided by the actual specifications. Therefore, optical waveguide design components are an important component of augmented reality glasses display image evaluation.

It is widely believed that optical waveguides are one of the promising ways to achieve economical augmented reality (AR)/hybrid reality (MR) devices, combining small-scale image quality to provide a complete immersive user experience. Multiple optical structures - waveguides, reflective combiners, and splitters - can be used to manufacture AR wearable devices. Each architecture has different advantages in terms of appearance (size and weight), visual comfort, optical quality, and cost. In all these aspects, the existing architecture needs to weigh the pros and cons, otherwise it cannot fully leverage its advantages. The portability and lightweight appearance are key factors that can be widely adopted in the market, and the optical path design of optical waveguides is one of its advantages. The use of high-quality and high refractive index glass can achieve a wider FOV and enhance the optical conductivity of wearable devices.

In order to achieve virtual components that are mixed with real environments, it is necessary to consider pupil size, virtual image, optical distance to the eye (line of sight), image magnification, and field of view when designing optical systems. Due to the use of optical components such as reflectors and beam splitters, the entire device becomes cumbersome and difficult to install various components in narrow spaces. The necessary part is the input and output optocouplers, which are made of high-precision nano grating diffraction optical devices. DOE and HOE are currently two commonly used light guiding technologies in wearable devices.

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