GIAI Photonics
Here we provide articles about popular science and applications of filters, lenses, prisms, reflectors, ND mirrors and other optical components. You are welcome to read! optical engineering articles, optical engineering guides, optical components, optical design, optics technology, photonics engineering
Peak transmission vs average transmission: peak transmission (Tpeak) is the single highest transmission value inside a filter's passband. Average transmission (Tavg) is the mean transmission…
Read articleAbsorptive and reflective neutral density (ND) filters both reduce light intensity, but they manage rejected optical energy differently. Absorptive ND filters primarily convert light energy…
Read articleCosmetic defects on optical components — scratches, digs, edge chips and coating blemishes — are inspected by cleaning the part, viewing each surface inside its…
Read articleTwo optical windows may use the same nominal anti-reflection coating design, yet deliver different optical results. One may achieve the expected reflectance, while the other…
Read articleHow are coating materials selected for a wavelength range? Engineers first find materials that are transparent across every wavelength where the coating must transmit or…
Read articleIn an optical filter, FWHM (full width at half maximum) is the width of the passband, measured between the two wavelengths where transmission falls to…
Read articleAn anti-reflection (AR) coating for a lens is not picked from a catalog name. It is selected by working backward from the optical system: what…
Read articleA coating that meets its spectrum at the center of a part can still fail at the edge of the clear aperture. The reason is…
Read articleShort answer: To choose an infrared optical material, start from the operating waveband and detector, then confirm low absorption at the real thickness and temperature.…
Read articleThin film interference works by splitting one light wave into two or more reflected waves, one from the top surface of a film and one…
Read articleA narrowband optical filter may meet its wavelength specifications during laboratory testing but behave differently after installation in an optical system. One possible reason is…
Read articleAn optical filter may deliver excellent peak transmission at its specified wavelength yet still perform poorly in an imaging or sensing system. The problem is…
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