Telecentric Lens vs Conventional Lens
A telecentric lens keeps image magnification essentially constant while the object moves along the optical axis, within a defined telecentric range. A conventional imaging lens…
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Optical Engineering
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
F-Theta Scan Lens Manufacturer | Custom Scan Optics
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…
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How to Select a Polarizing Filter for Machine Vision
Selecting a polarizing filter for machine vision glare reduction starts with one question that has nothing to do with the filter itself: is the glare…
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How to Choose a Raman Longpass Edge Filter
Choosing a Raman longpass edge filter should start with two numbers: the excitation laser wavelength and the lowest Stokes Raman shift you need to measure.…
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How to Verify Laser Line Rejection for Raman Spectroscopy
Verifying laser line rejection for Raman spectroscopy means proving three separate things, not one: the optical density at the laser wavelength under the angle and…
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Optical Filter Orientation: Coated Side Toward Source
For a symmetric all-dielectric filter on a non-absorbing substrate, used near normal incidence at low optical power, flipping the part does not change the transmitted…
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Optical Filter Spectral Tolerance Explained
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…
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NIR Bandpass Filter for Machine Vision: Selection Guide
A machine vision system may use an 850 nm or 940 nm LED, a monochrome camera with good near-infrared sensitivity, and stable exposure settings—yet still…
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What Is a Dichroic Mirror? Working Principle, Uses & Selection
A dichroic mirror is a wavelength-selective optical component designed to reflect one spectral region while transmitting another. Unlike a conventional mirror that is intended to…
Read articleWhat Causes Ghost Images in Beamsplitters?
A ghost image in a beamsplitter is a second, weaker image formed by light that reached the detector along an unintended optical path inside the…
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Polarizing vs Non-Polarizing Beamsplitter
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,…
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What Is Edge Steepness in an Optical Filter?
what is edge steepness in an optical filter Edge steepness describes how quickly an optical filter transitions between its passband and its blocking region. It…
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