Optical filters are important components in modern optical systems and are widely used in optical instrument fields such as scientific research, industrial production, biomedicine, and communication technology. In the manufacturing process of optical filters, the selection of substrate optical materials is crucial because their performance…
Optical components are an indispensable part of optical systems, used to manipulate, adjust or detect the behavior of light. With the continuous development of optical technology, the functions and application range of these components are becoming increasingly rich. From basic optical functions to complex adaptive…
Knowing how to choose a wavefront error specification means defining more than a number such as λ/4 or λ/10. A complete specification should identify what wavefront is being controlled, whether the limit is PV or RMS, the reference wavelength, the evaluated aperture, which low-order terms…
Choosing a silicon lens starts with the operating wavelength, not the lens diameter or catalog shape. Confirm that silicon is suitable for the complete spectral band, then define the optical prescription, aperture, material grade, AR coating, temperature range, mechanical interface, and acceptance criteria. For demanding…
When engineers compare hard coated vs soft coated optical filters, the most important difference is not simply whether one coating feels physically harder than another. The terms describe two broad approaches to thin-film filter construction that differ in coating materials, deposition conditions, film density, environmental…
Choose a germanium infrared window when you need a rugged, visible-blocking aperture for an 8 to 14 µm thermal imager that stays below roughly 100 °C. Choose a zinc selenide (ZnSe) window when the aperture has to pass a high-power CO2 laser beam at 10.6…
An optical filter is an optical element used to select the required radiation band of light, while filtering out the unnecessary wavelength range. Of course, its most essential function is to filter out unnecessary light. It plays a key role in various optical systems and…
A flat-top bandpass filter holds near-peak transmission across the whole passband and then drops steeply at both edges. A Gaussian bandpass filter reaches maximum transmission only at the center wavelength and falls away gradually on either side. The choice between a flat-top vs Gaussian bandpass…
Choosing an F-theta scan lens manufacturer is not simply a matter of matching a lens to a laser wavelength. An F-theta lens works as part of a complete scanning system. Its practical performance depends on the laser wavelength, input beam diameter, effective focal length, galvanometer…
Engineers usually reach the question of how to calculate F-theta scan field size at one of two moments: when a marking field has to cover a part of known dimensions, or when a calculated field does not agree with the number printed on a lens…
When specifying a mirror, beamsplitter, filter, or other coated optical component, choosing between a dielectric coating and a metallic coating is not simply a question of which one has higher reflectivity. The two coating families produce optical behavior through different physical mechanisms. Metallic coatings are…
Infrared temperature measurement filters are optical filters specially designed for infrared bands and are commonly used in non-contact temperature measurement equipment. They can selectively transmit infrared radiation and filter out interference light from other bands, thereby achieving high-precision temperature detection. This article will introduce in…
