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Transition Width & Edge Steepness
By IDEX Health & ScienceTransition width and edge steepness are two terms often used to describe the spectral properties of edge filters and it is important to know that these two terms are related, but not interchangeable. Transition Width is the maximum distance between the laser line (where OD>6) and the 50% transmission point. Edge Steepness is the actual distance between the place where OD>6 ends and the 50% transmission point. -
Semrock Filters Don't Burn Out
By IDEX Health & ScienceAll Semrock filters are hard coated with sophisticated Ion Beam Sputtering (IBS) technology, resulting in patented state-of-the-art filters with extremely durable hard glass coatings on a single hard glass substrate. No absorbing glass and no lamination is necessary. The result is exceptionally durable "no burn out" fluorescence filters of the highest performance. -
Scratch Dig Inspection Process
By IDEX Health & ScienceAll Semrock filters are inspected in accordance with industry standards established for optical components. Learn how our team inspects each filter. -
Measuring Light with Wavelengths and Wavenumbers
By IDEX Health & ScienceThe "color" of light is generally identified by the distribution of power or intensity as a function of wavelength λ. Visible light has a wavelength that ranges from about 400 nm to just over 700 nm. Sometimes it is convenient to describe light in terms of units called "wavenumbers," where the wavenumber w is typically measured in units of cm-1 ("inverse centimeters") and is simply equal to the inverse of the wavelength, and is therefore proportional to frequency. -
RazorEdge Filter Layout
By IDEX Health & ScienceIn many high-performance Raman systems with microscopic imaging capabilities or highly sensitive remote probes it is desirable for the excitation laser beam and the Raman-shifted signal light to share a common light path. Illustrations in this tech note describe the two layouts and the ideal filters for each system. Learn More
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Filter Packaging
By IDEX Health & ScienceSemrock uses individual PET-G packaging for standard-size catalog filters. This packaging allows Semrock to keep the parts cleaner, reduce potential defects caused by shipping & handling, and utilizes 100% recyclable PET materials. -
Edge Filters vs. Notch Filters for Raman Instrumentation
By IDEX Health & ScienceThe RazorEdge edge filters and the StopLine notch filter are both available with OD>6 blocking of the laser line. Should you use an edge filter or a notch filter to block the laser line in your Raman system? Learn more. -
Selecting the Appropriate Mirror for your System
By IDEX Health & ScienceHigh-performance optical mirrors are a key component to most system designs. From bench-top setups to high-end lab instrumentation, mirrors can enable a reduced system footprint, combine multiple sources, help to form images, or other purposes. This article provides a high-level, basic overview of some of the key specification parameters to consider when selecting the appropriate mirror for your optical system. -
Optics Basics and Types of Optical Filters
By IDEX Health & ScienceSharpen your optical filter knowledge with our 12-part lecture series on filters. Presented by Turan Erdogan, PhD, these lectures were a part of a day-long group presentation. -
KolaDeep™ Spectral Measurement System: Measure Deeper Blocking
By IDEX Health & ScienceThe Kola Deep spectral measurement system brings Optical Density (OD) theory into measurement reality. Our engineers developed a proprietary new system that allows for proven measurement of the steepest and deepest spectral features of Semrock-brand Optical Filters, ensuring your instrument will deliver best-in-class sensitivity. Learn More
