Multi-band pass filter (dual band pass filter)

In recent years, the adoption of near-infrared sensing technology has rapidly expanded across a wide range of fields, including autonomous driving, industrial robots, smartphones, and medical devices. Applications such as spatial recognition using onboard LiDAR and TOF sensors, wearable devices for facial recognition and biometric measurement, and non-invasive medical applications using light are all reaching practical implementation and widespread use, leading to an increasing demand for optical components that support these technologies year by year. Among these, the "bandpass filter," which selectively transmits only specific wavelengths, is becoming increasingly important in development environments as a key component that affects the accuracy and reliability of sensors. At Adachi New Industry Co., Ltd., we offer a standard inventory of near-infrared bandpass filters ranging from 660nm to 940nm to meet these diverse needs. Chapter 1: Why are red to near-infrared bandpass filters attracting attention now? Chapter 2: Basics of bandpass filters and the characteristics of "near-infrared" Chapter 3: Detailed explanation of use cases by wavelength: Roles and market trends from 660 to 940nm Chapter 4: Introduction of standard inventory: A ready-to-use lineup of six wavelengths Chapter 5: Custom design support: Optimal filters tailored for customers Conclusion: The future opened up by near-infrared bandpass filters

Light includes "visible light," which can be seen by the human eye, and invisible light. Near-infrared (NIR) is one type of "invisible light" located right next to visible light. In fact, it is deeply involved in various devices and industrial processes around us, and its importance has been increasing in recent years. We will explain clearly from the basics of "What is near-infrared?" to the fields in which it is used, and its relationship with optical coating technology. 01: What is near-infrared? — Organizing the "companions" of light 02: Where is near-infrared used? — Expanding application fields 03: The relationship between near-infrared and optical coatings — The power of "thin films" that enhance performance 04: The precision required for near-infrared filters Summary: The key to utilizing near-infrared lies in precise optical thin films Near-infrared compatible filter "Artisan Infrared" For more details, please visit our company website.

"Extract only the desired light" — this is the role of optical components known as band-pass filters (BPF). We will explain the mechanism and selection of BPFs, which are used in various fields such as medical, industrial, and environmental measurement, in an easy-to-understand manner, even without specialized knowledge. Camera sensors, medical fluorescence microscopes, factory appearance inspection devices, environmental measurement sensors — these seemingly completely different devices share a common technical challenge: "accurately extracting only the necessary wavelengths from light that contains countless wavelengths." For example, in fluorescence imaging, it is essential to detect only the weak fluorescence signals amidst strong excitation light. In factory appearance inspection, it is necessary to shut out stray light from daylight and fluorescent lamps to detect only the illumination wavelengths. The optical component responsible for this "light selection" is the band-pass filter (BPF). The name may sound complicated, but once you understand its mechanism, it is based on a very simple principle. We will present the basic concepts of BPFs, manufacturing principles, and points for application selection in a format that can be read in five minutes. Please check our company website for more information.

The areas where drones are active are rapidly expanding from surveying, infrastructure inspection, agriculture, logistics, and disaster prevention to defense and security fields in recent years. In addition to the demand for high-precision sensing in the private sector, the requirements for optical systems mounted on drones are becoming increasingly stringent in defense applications such as border surveillance, information gathering, search and rescue, and unmanned operational support. While the miniaturization and weight reduction of the aircraft are progressing, the proposition of "obtaining more precise information in harsher environments" remains unchanged. One key to solving this contradiction is optical thin film technology. Optical thin films, which control the reflection, transmission, and blocking of light at the nanometer level, are a technology that fundamentally enhances the performance of mounted sensors across the visible light, near-infrared, and thermal infrared ranges. We will introduce the role that optical thin films play in drone development from the perspectives of industry, agriculture, and defense. 1. What are optical thin films? — Basic knowledge for drone developers 2. By field: The roles played by optical thin films 3. Featured technology: 8-14μm band infrared AR coating 4. Quick reference table for utilization images by development phase 5. Proposal for co-creation — Let's start together from a prototype For more details, please refer to our company website.