Choosing a ZnSe lens manufacturer comes down to three things you can actually verify: the grade and traceability of the chemical vapor deposition (CVD) zinc selenide blank, the measured bulk absorption at your operating wavelength, and whether the polishing and coating processes hold surface figure…
As an important optical component, optical filters are widely used in scientific research, medical treatment, industry and other fields. In the production process of filters, there is a significant difference in cost between customized filters and standard filters. This article will explore the reasons for…
Optical glass refers to glass materials with specific optical properties, which are widely used in various components in optical systems. Optical glass can be divided into many types according to different optical properties, application requirements and material composition. Each type of optical glass has unique…
Two optical components can look almost identical, use the same substrate material, and have similar dimensions—yet their coating costs may be very different. The reason is that optical coating cost is driven less by the visible amount of coating material and more by the difficulty…
Wavelength in optics is the spatial distance over which a light wave repeats, commonly measured from one wave crest to the next. It is represented by the Greek letter λ (lambda) and is normally expressed in nanometers (nm) for visible and near-infrared optics or micrometers…
Temperature drift refers to the phenomenon that the performance, parameters or output results of a physical device or system are offset or changed due to changes in ambient temperature. This drift is usually an unavoidable physical effect that affects measurement accuracy, system stability and equipment…
Extinction ratio is the ratio between the transmittance a polarizer gives to the polarization state it passes and the transmittance it gives to the orthogonal state it is meant to block, at a stated wavelength, angle of incidence and aperture. A part specified at 1000:1…
Edge steepness describes how quickly an optical filter transitions between its passband and its blocking region. It is measured as the wavelength interval between two defined reference points on the transition — for example between the 50% transmission point and the wavelength where transmission drops…
Interference filter is an important device in optical technology. It uses the interference effect of light waves to selectively transmit or reflect specific wavelengths within the spectral range. With its high-precision and high-efficiency optical performance, it plays an irreplaceable role in scientific research, industrial manufacturing,…
Infrared filters, as a specially designed optical device, allow infrared light within a specific wavelength range to pass through while blocking other wavelengths of light, especially visible light and ultraviolet light. The working principle of this filter is based on the selective absorption and transmission…
The topic is suitable as a foundational definition page. GIAI already has more specific content covering 1064 nm F-theta lenses, field-size calculation, standard vs. telecentric designs, and F-theta lens selection, so this page should act as the conceptual pillar rather than duplicate those narrower articles.…
Short-wave pass filter, also called short-wave filter, low-pass filter, long-wave cut-off filter, is a type of cut-off filter. It is an optical filter that only allows short-wavelength light to pass through and blocks long-wavelength light, that is, it is mainly used to block the interference…
