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Knowledge Hub


Explore our comprehensive collection of technical information that provides valuable guidance and expertise to drive your projects and initiatives. Whether you're looking for in-depth analysis, practical tutorials, or expert perspectives, our Knowledge Hub is your gateway to unlocking the knowledge you need to succeed. Learn about a wide range of topics related to lenses, optical filters, optical systems and cutting-edge technology. From understanding the intricacies of lens design to delving into the latest advances in optical engineering. Please use the search bar below to find topics and more information.

01.03.2024 | Technical paper

New perspectives in coating


By Michael Haag

In our pursuit of product improvement, we have ventured into a new path of surface-coating technology. This approach provides novel possibilities for coating optical elements.

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01.03.2024 | Technical paper

The image quality of lenses for digital photography


By Dr. Karl Lenhardt

Dive into our comprehensive guide as we explore the critical factors to consider when choosing a lens. From image quality to features and beyond, we'll equip you with the knowledge you need to make the right choice for your imaging needs.

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01.03.2024 | Technical paper

Non-destructive measurement of antireflective coatings on curved surfaces


By Lothar Völker and Michael Schulz-Grosser

To minimize disruptive reflection losses, optical components such as lenses and eyeglasses are now equipped with highly effective antireflective coatings. However, the measurement methods used in quality control using scanning spectrophotometers are often non-destructive in practice and can hardly be used at arbitrary locations on a curved surface. A special measurement head design in conjunction with a diode array spectrometer provides a solution.

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01.03.2024 | Technical paper

Using Different Illumination Sources? Get ready to Change Your Lens Focus


By Stuart W. Singer and Jim Sullivan

The human eye perceives wavelengths between 0.400 μm (blue) and 0.700 μm (red) as white light. Standard lenses are optimized for white light, but issues can arise with non-white light sources in digital camera-based vision systems. Defining lighting requirements early is crucial. A case example using a 75 mm f/3.0 lens is discussed, focusing on selecting wavelengths and achieving desired modulation transfer function (MTF) values.

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