Optical Filters White Papers and Case Studies

  1. Optical Filter Spectral Features 4/5/2023

    Optical filters selectively transmit light in a particular range of wavelengths. The spectral features of optical filters are important for selecting the right filter for a particular application.

  2. New Metrology Techniques For Advanced Thin Film Optical Filters 6/18/2020

    Measuring the spectral response of advanced thin film optical filters is challenging, but can be overcome with the right approach.
     

  3. Flat Top, Ultra-Narrow Filters Using Plasma Deposited Hard Oxide Coatings 6/18/2020

    Alluxa’s new class of ultra-narrow filters are designed for applications such as laser cleanup, lidar, telecommunications, and instrumentation. They also offer the narrowest and “squarest” filter profiles in the visible and NIR, as well as transmission levels that approach 100%.

  4. Specifying Plasma Deposited Hard-Coated Optical Thin Film Filters 6/18/2020

    Learn about different filter types, their key attributes, and how to optimize cost. The filters discussed include high cavity count band pass, replacement, tilted beamsplitter filters, and more.

  5. Advanced Plasma Deposition Improves Ultra Narrowband Optical Filters 6/18/2020

    Narrowband filters are a critical technology for lidar, laser cleanup, chemical and gas sensing, and more. Because creating multicavity filters is a challenge for deposition process control systems, Alluxa uses a computer-controlled variation on the turning point method of thickness control for each individual layer.

  6. Ultra-Narrowband Optical Bandpass Filters With Large Format And Improved Temperature Stability 6/18/2020

    Hard coated ultra-narrowband optical filters made using modern plasma processes offer much improved transmission, temperature stability and out of band blocking as compared to legacy soft coatings. These filters are used in optical systems as diverse as LIDAR (light detection and ranging), Doppler shift detection of plasma velocity, laser cleanup, chemical and gas sensing, as well as for cutting-edge astronomy and instrumentation applications.

  7. Multiband Filters Redefine Performance Standards Across Disciplines 6/18/2020

    Advances in thin-film technology have led to new classes of multiband filters that redefine performance standards and drive innovation. By understanding their scientific and industrial applications, various filter classes and manufacturing possibilities are also better understood.

  8. Alluxa Introduces HELIX™ Spectral Analysis System For Measuring High-Performance Thin-Film Optical Filters 6/18/2020

    The HELIX Spectral Analysis System has redefined measurement capabilities of high performance thin-film optical filters. HELIX is an instrument designed and developed by Alluxa Engineering staff to address the limitations of most commercially available spectrophotometers.

  9. Thin Film Glossary 6/17/2020

    This article defines a number of glossary terms related to thin film optical filters and their use.

  10. Utilizing Flow Cytometry Filters 6/17/2020

    Used across a variety of biological disciplines, fluorescence-based flow cytometers rapidly and accurately quantify cells and cellular components. As one of the most important components of these systems, flow cytometry filters must be specifically designed to maximize signal-to-noise ratios while minimizing crosstalk between fluorophores.