Development trend of optical component technology

Mar. 11, 2019

Optical components refer to the main components of optical systems that use optical principles to carry out various activities such as observation, measurement, analysis and recording, information processing, image quality evaluation, energy transmission and conversion. They are important components of the core components of various optical instruments, image display products and optical storage equipment. According to the classification of precision and use, it can be divided into traditional optical components and precision optical components. Traditional optical components are mainly used in traditional cameras, telescopes, microscopes and other traditional optical products; Precision optical components are mainly used in smart phones, projectors, digital cameras, cameras, photocopiers, optical instruments, medical equipment and a variety of precision optical lenses.

With the development of science and technology and the improvement of manufacturing technology, smart phones, digital cameras and other products have gradually become important consumer products of residents, driving optical products to increase the precision requirements of optical components.Smart phones and digital cameras are the most important applications of precision optical components in the world. In the security monitoring, car camera, smart home also put forward higher requirements for camera definition, which not only increased the demand for hd camera optical lens film, but also prompted the traditional optical coating products to upgrade to higher gross margins of optical coating products.

The development trend of industry

1.1The changing trend of product structure

The development of precision optical component industry varies with the demand of downstream machine products. Optical components are mainly used in photovoltaic products such as projectors, digital cameras and precision optical instruments, and in recent years, with the rapid popularity of smartphones, the digital camera industry has been in decline, the market share has been gradually replaced by the high clear photo phone, and the wave of smart wearable devices led by apple has been a fatal threat to traditional Japanese photoelectric products.
Overall, the rapid growth in demand for security, on-board and smart phone products has led to the structural adjustment of the optical component industry. With the adjustment of product structure in the downstream of the photoelectric industry, the optical component industry in the middle of the industrial chain is bound to change the direction of product research and development, adjust the product structure, and move closer to new industries such as smart phones, security systems and vehicle-borne lenses.
1.2The changing trend of technology upgrading
The terminal photoelectric products are developing in the direction of higher pixels, lighter and cheaper, and higher technical requirements are put forward for optical components. In order to adapt to the trend of product changes, optical components have changed in the materials, technical technology and so on.

1, The optical non-spherical mirror is partial

Spherical lens has the disadvantages of aberration in imaging, such as decreased definition and distortion. Aspherical lens can obtain better imaging quality, correct various aberrations, and improve the ability of system discrimination. One or several aspheric lens parts can replace multiple spherical lens parts, simplify the instrument structure and reduce the cost. Parabolic mirror, hyperboloid mirror and elliptical mirror are commonly used.
2, The wide use of optical plastics
With the development of synthetic technology and the improvement of processing technology, optical plastics have developed rapidly. The traditional optical glass material is expensive, the production and reprocessing technology is complex, and the yield is not high. Compared with optical glass, optical plastic has good molding process characteristics, light weight, low cost and other advantages, has been widely used in photography, aviation, military, medical, education and other civilian fields of optical instruments and equipment.
From the perspective of the application of optical lens, all kinds of lenses and lenses have plastic products, can be directly molded by molding process, do not need the traditional milling, grinding, polishing and other processes, especially suitable for aspheric surface optical elements. Another feature of the use of optical plastic is that the lens can be directly formed with the frame structure, simplifying the assembly process, ensuring assembly quality and reducing production costs.
In recent years, it has been studied to use solvents to diffuse into optical plastics, change the refractive index of optical materials, and control product characteristics from the stage of raw materials. In recent years, China also began to pay attention to the application of optical plastic development, its application has been extended from optical transparent pieces to the optical system of imaging, domestic manufacturers in the viewfinder optical system in part or all optical plastic instead of optical glass. In the future, if the defects of optical plastics such as poor stability, refractive index changing with temperature and poor wear resistance can be overcome, the application of optical plastics in the field of optical components will be more extensive.
3, The popularity of blue glass IRCF
The blue glass IRCF is mainly used in cameras above 8 million pixels. Since 2012, the blue glass IRCF has been used in new models of high-end apple and Samsung mobile phones, as well as high-end OPPO, Xiaomi and other domestic mobile phones. In the future, blue glass IRCF will become an indispensable part of smartphones with over 8 million pixels.

By coating the glass with infrared cutoff film, IRCF can cutoff the infrared ray in the incident light, so as to obtain better imaging effect, which is an indispensable part of the camera. However, in the high pixel camera, because the lens layer is more, it is easy to form bright spots and ghost after multiple reflections. Blue glass IRCF USES its special material to absorb infrared light, avoiding the interference of reflected light and achieving better imaging effect. It is mainly used in cameras with over 8 million pixels.

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