660nm bandpass filter (visible light range): FA sensor, laser, etc.

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.

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.

We have added a standard stock lineup for the "bandpass filters using colored glass," which has been frequently inquired about! If you are considering a 900nm bandpass filter, please feel free to utilize it. This product is designed to maintain a consistent transmission rate even when the angle changes, and the waveform remains stable even if the angle is misaligned, thanks to the use of colored glass. ◆ About standard stock items from Adachi Shin Sangyo Co., Ltd. .. - I need a few pieces at different levels for urgent product development and performance testing... - I want to try a rough estimate for now... - I would like to make a slight change in shape for prototyping... Adachi Shin Sangyo sincerely addresses the voices of such customers! In today's world, where simulation technology has advanced, we will respond quickly to customer requests by providing standard stock items, so please feel free to contact us!