3-wavelength anti-reflective coating

A technology that simultaneously imparts conductivity and near-infrared optical properties to rigid resin optical components. In recent years, with the proliferation of automotive LiDAR and various infrared sensors, the demand for optical components that achieve both high transmittance and low reflectance in the 905nm band has rapidly increased. Especially in sensing using ToF methods or pulsed lasers, even slight reflection losses or scattering directly affect detection accuracy, making wavelength-specific optical design essential. On the other hand, the cover materials that protect these sensors from external environments require specific characteristics of resin materials, such as mechanical strength, impact resistance, dimensional stability against temperature changes, processability, and suitability for mass production, making the coexistence of optical and mechanical properties a significant design challenge. At Adachi New Industries, we have established a composite thin-film process that combines the acrylic resin material "Alonix Sheet" from Toa Gosei Co., Ltd. with the following. Please check our company website for more details.

In recent years, technological innovations in the agricultural sector have significantly shifted from traditional biological approaches such as soil improvement and breeding to an engineering concept of "designing the environment itself." Particularly noteworthy is smart agriculture, which integrates precise control of light environments with sensing technology. Plant growth is complexly determined not only by light intensity but also by wavelength distribution, angle of incidence, temporal variations, and interactions with surrounding temperatures. In other words, agriculture can essentially be described as "the science of spectral control." In this context, optical thin films and optical filters play an extremely important role. Optical thin films are functional materials that allow for precise design of reflectivity, transmittance, absorbance, and interference characteristics through control of film thickness on the nanometer scale. By using multilayer interference structures, it is possible to selectively transmit and reflect specific wavelengths, which directly contributes to optimizing effective light for photosynthesis in plants and controlling unwanted infrared and ultraviolet light. For more information, please check our company website.

Optical thin-film filters are important optical components designed to transmit and reflect light at specific wavelengths. Optical filters have the troublesome characteristic of "angle dependence," where the transmission and reflection properties change depending on the observation angle and the angle of incidence. This property can be both an advantage and a challenge depending on the usage conditions of the filter. In this article, we will explain in detail the reasons for the angle dependence of optical thin-film filters and its effects, as well as practical considerations and countermeasures. 1. Basics of optical thin-film filters and angle dependence 2. What is angle dependence? 3. Effects of angle dependence and application examples 4. Countermeasures and design considerations for angle dependence A message to designers - from a film manufacturing company For more details, please visit our website.

The Kansai Expo is being held as an international event where cutting-edge technologies, services, and cultural expressions from around the world gather under the grand theme of "Designing a Future Society Where Life Shines" (as of the article dated September 29, 2025). From AI-driven autonomous robots and next-generation mobility to immersive video experiences, space exploration technologies, and future medical and healthcare innovations, a wide range of innovative technologies are being showcased right before the eyes of visitors, providing a valuable opportunity to experience the vision of society's future up close. In our series, we have focused on optical thin films and fine pattern processing (metallization) technologies, which function as the unsung heroes behind these cutting-edge technologies, introducing them over seven installments. Optical thin films enable precise light control, such as reflection, transmission, and wavelength selection, playing an essential role in various advanced devices like sensors, cameras, projectors, and space equipment. Meanwhile, fine pattern processing serves as a foundational technology that supports the high precision of electronic devices, biosensors, and next-generation displays by controlling structures at the nanometer level. For more details, please visit our company website.