On April 26, 2024, the highly anticipated Yokohama International Optics and Photonics Exhibition (OPIE) officially came to an end. GATE also showed its style in this exhibition. GATE’s participation not only demonstrated its profound strength in the field of optics, but also reflected its keen…
Protected aluminum and enhanced aluminum start from the same vacuum-deposited aluminum film. The difference is what goes on top: protected aluminum adds a single dielectric overcoat that stops oxidation and makes the surface cleanable, with almost no change to the reflectance curve, while enhanced aluminum…
Color filter is a key material in modern display technology, especially in the field of liquid crystal display (LCD). It filters white light into three basic pigment dot matrices of red, green and blue through a specific process, thereby realizing color display. This article will…
A beamsplitter is often described simply as an optical component that divides one incident beam into transmitted and reflected paths. In an actual optical system, however, an important question comes first: Should the splitting behavior depend on polarization? That question separates two major categories: polarizing…
Polarizer, also known as polarizing filter, is an optical element that controls the polarization state of light waves. By filtering out light with a specific polarization direction or generating a beam with specific polarization characteristics, polarizers play an important role in optical imaging, photography, polarization…
Photorejuvenation is a popular non-invasive beauty method that relies on advanced optical technology to improve skin quality. It acts on the skin with photons of specific wavelengths, reduces pigmentation and stimulates collagen production. The optical screening process requires the use of filters. The core of…
Optical filters are essential components in a wide range of applications, from scientific research to industrial processes. Their performance is defined by a set of key parameters that determine their suitability for specific tasks. Understanding these parameters is crucial for selecting the right filter for…
In the field of optics, filters are widely used in various optical instruments and equipment as an important optical element. Among them, long pass filters (LPF, also known as high pass filters, HPF) have become an indispensable part of the optical field with their unique…
Physical thickness is the actual geometric thickness of a thin-film layer, while optical thickness describes how that layer affects the phase of light. At normal incidence, optical thickness is commonly written as ndn d, where nn is refractive index and dd is physical thickness. Two…
Optical prism, as an important component in the field of optics, plays an irreplaceable role in various optical instruments due to its diverse structures and functions. This article will explore in depth the classification of optical prisms and their unique role in various application scenarios.…
Optical filters may not be as well-known as lenses or mirrors, but they play a crucial role in modern technology, science, and everyday life. From enhancing the clarity of images in cameras to enabling cutting-edge scientific discoveries, optical filters are indispensable tools. This article dives…
A filter described as “850 nm,” “550 nm longpass,” or “10 nm bandpass” is not fully specified by those nominal numbers alone. Real optical filters are manufactured and measured against an allowable range. A nominal 850 nm bandpass filter, for example, may require its actual…
