UV cut filter: A filter that efficiently cuts ultraviolet rays.

Optical filters are important devices used to extract only the necessary wavelengths from light or to block unnecessary wavelengths. They are utilized in a wide range of fields, from cameras and displays that we commonly see, to spectroscopic analysis devices used in medical and bio fields, as well as in industrial applications such as laser processing and optical communication. Light encompasses a broad wavelength range, including ultraviolet, visible, and infrared light; if the desired light cannot be precisely controlled, it can lead to issues such as false detection, increased noise, and decreased image quality. This is where the concepts of "cut-on" and "cut-off" come into play. These concepts indicate the boundary where light begins to transmit and the boundary where transmission ends, forming the foundation of optical filter design. 1. Definition and Basic Principles of Cut-On and Cut-Off The most important parameters for correctly designing and evaluating optical filters are the "cut-on wavelength" and "cut-off wavelength." These are not just names; they are reference values that numerically define the effective performance of the filter, specifically which wavelength ranges are transmitted and which ranges are blocked. 2. Technical Points of Design and Control For more details, please visit our company website.

The UV-IR cut filter is an optical thin-film filter that selectively removes unwanted light in the ultraviolet (UV) and infrared (IR) wavelength ranges, allowing only specific wavelength bands of light to be transmitted or reflected with high precision. This filter achieves wavelength selectivity by utilizing interference effects through the precise layering of multilayer dielectric films and metal films. Generally, it requires control of film thickness on the order of nanometers, exceeding several tens to over a hundred layers, and its optical properties are determined by multiple parameters such as film thickness accuracy, refractive index of the film material, smoothness of the film interfaces, and adhesion of the films. 1) What is a UV-IR cut filter? 2) Historical background of UV-IR filter manufacturing in Japan 3) Why has overseas manufacturing of UV-IR cut filters progressed? 4) If UV-IR cut filters were to be produced again in Japan... necessary points (hypothesis) 5) Technically important points when selecting UV-IR cut filters 6) Future prospects Conclusion - The efforts of Adachi New Industry Co., Ltd. to focus on domestic production in Japan For more details, please visit our company website.

At the 2025 Osaka-Kansai Expo, cutting-edge technology and cultural expression were beautifully integrated, with projector technology fully utilized to stimulate the senses of visitors. Immersive video presentations and interactive exhibition experiences, both inside and outside the pavilions, were made possible through projection with high brightness, high resolution, and wide color gamut. It may be a bit late to say this, but from the perspective of "Could projectors hold the key to future visual expression?", I have summarized the optical components used in projectors in a way that can be understood in five minutes. Please feel free to read on. 【1】Changes in the projector market 【2】Comparison of LCD, DLP, and LCOS 【3】General optical structure of projectors 【4】Types and specifications of optical filters for projectors 【5】Future trends in projectors and the position of Japanese thin-film manufacturers Conclusion - Nevertheless, Adachi New Industry is committed to domestic production For more details, please visit our company website.

The 2025 Osaka-Kansai Expo will feature the theme "Designing a Future Society Where Life Shines," showcasing numerous cutting-edge visual productions and experiential exhibits. Central to creating immersive video experiences that strongly engage visitors is projector technology. Supporting this performance at its core are optical thin films (optical filters) applied to lenses and optical components. As brightness and resolution increase, the quality of optical thin films directly impacts the clarity, color reproduction, and durability of the images. The "amazingness" of the video technology at this Kansai Expo has evolved beyond merely providing visual information to becoming a means of reconstructing the space itself. In particular, in the field known as "immersive video," stimulating multiple senses such as sight, hearing, and touch allows viewers to be drawn into the narrative, blurring the boundaries between reality and the virtual experience. 【1】The Power of Video Supporting Immersive Experiences 【2】What is a Three-Sided Screen? - The Key to Video Production Supported by Projectors 【3】What are the Representative Pavilions Where You Can Actually See a Three-Sided Screen at the Expo? 【4】What Optical Thin Films are Necessary for Projectors to Achieve a Three-Sided Screen? 【5】What is the Future Where Three-Sided Screens and Projectors are Introduced into Homes?