A few days ago, China's leading micro-nano optical core technology company: BJYG Micro-nano Optical Technology Corporation has launched a new diffractive optical waveguide product with completely independent patent design, world-leading optical performance, and mass production.
With its deep accumulation in micro-nano optical design, semiconductor precision processing, efficient automatic detection and other links, BJYG has conducted in-depth research and repeated development iterations on diffractive optical waveguide technology after tracking various AR technologies for many years, and successfully launched a completely independent patent design. , AR diffractive optical waveguide products with excellent optical performance and excellent mass production performance.
This is the second-generation diffractive optical waveguide product of BJYG. Its goal is to meet the balanced needs of customers in the market for performance and cost. On the premise of maintaining leading performance, it can effectively support end customers in mass production next year. Consumer AR glasses products.
Optical waveguide is an optical technology, which is widely used in the fields of optical communication and laser. In simple terms, it is the directional propagation of light in a specially designed material device structure. The principle of total reflection is applied. The material with a large refractive index is used in the center and the material with a small refractive index is used around it, It can confine light to propagate in the medium.
Optical waveguides can be roughly classified into two types: Geometric Waveguides and Diffractive Waveguides.
Among them, the geometric optical waveguide is the array optical waveguide, which mainly realizes the output of the image and the enlargement of the eye-moving frame by stacking the array mirrors. The representative optical company is Israel's Lumus. At present, there is no large-scale mass production of eyewear products on the market.
Diffractive optical waveguides can also be subdivided into surface relief grating waveguides (Surface Relief Grating) fabricated by photolithography technology and holographic volume grating waveguides (Volumetric Holographic Grating) fabricated based on holographic interference technology. HoloLens 2 and Magic Leap One belong to the former; Akonia, a company acquired by Apple, and Digilens are dedicated to the latter.
There are two major breakthrough difficulties in diffractive optical waveguide products: one is design capability, which is reflected in product performance and patent barriers; the other is mass production performance and cost.
This is reflected in recent industry events:
In May 2021, the British optical waveguide manufacturer WaveOptics was acquired by the American social giant Snap for more than US$500 million. It is speculated that the important reason is to obtain core patents, and to compete with technology giants such as Meta (Facebook) and Microsoft. tickets.
At present, there are only a handful of companies in China that have the core technology of diffractive optical waveguides. Most of the products that are brought to the market are imitating the patented microstructure design of Microsoft or WaveOptics, which has the risk of infringing international patents.
In 2021, many companies at home and abroad will launch AR terminal products equipped with diffractive optical waveguides, but they are all too expensive or have not announced the price, so they cannot be mass-produced. The main constraints are the mass production and cost of optical waveguides.
BJYG is committed to the design, manufacture and application of advanced diffractive optical elements (DOE) and micro-nano optics, providing customers with complete diffractive optical solutions, which are widely used in 3D scanning, 3D sensing, intelligent recognition, machine vision, AR/VR , behavior big data analysis, intelligent monitoring, vehicle assistance systems and many other fields.
A few days ago, BJYG launched a new diffractive optical waveguide product, which not only possesses the intellectual property rights of its own core technology, but also breaks through the patent blockade of foreign manufacturers such as WaveOptics and Microsoft, forming a more advanced and original technical route and patent layout; , imaging quality and other aspects have excellent performance in third-party tests, ranking among the top international levels.
Taking the diffractive optical waveguide with MicroLED optical machine as an example, the average luminous efficiency of the full screen brightness is higher than 320 nit/lm, which can meet the requirements of use in bright outdoor environments, and the imaging uniformity exceeds 95%. The single-chip design field of view Reaching more than 40, it surpasses comparable products on the market in all aspects.
More importantly, the product has the advantages of mass production and cost. It has formed a monthly production capacity of thousands of pieces and is continuously improving. The cost is controllable and continuously optimized, which can effectively support the mass production and launch of consumer AR glasses products for end customers.
Under the premise of maintaining leading performance, BJYG's optical waveguide products avoid the use of helical teeth, variable depth and other processes that affect yield, and the performance fluctuation between chips is more stable, which improves mass production and reduces costs. , and retains room for further performance improvement.