Alluxa (Santa Rosa, CA) designs and manufactures next generation, hard-coated optical filters using the proprietary SIRRUS Plasma Deposition Process. The sophisticated coating process provides precision wavelength control and uniform coatings, even for large-format parts. It also permits production of the same high-performance optical filters over multiple coating runs and in multiple chambers. Alluxa can produce thin-film coatings in a fraction of the time (compared to standard coating methods) and make automated adjustments to layer thicknesses and uniformity in real time – translating to higher performance and lower costs for our customers.
Our proprietary HELIX™ Spectral Analysis System has redefined measurement capabilities of high-performance thin-film optical filters to address the limitations of most commercially-available spectrophotometers. The system’s capabilities are four-fold: it is able to track filter edges to OD7 (-70 dB), evaluate blocking to OD9 (-90 dB), resolve edges as steep as 0.4% relative to edge wavelength from 90% transmission to OD7, and resolve passbands that are as narrow as 0.1 nm at full width half maximum (FWHM).
The company’s commitment to advanced metrology ensures that once coated, the performance of Alluxa optical filters is tested using state-of-the-art instruments. Optical filter transmission and blocking in the UV, VIS, and NIR are measured using one of the most advanced spectrophotometers on the market, and IR filters are measured using an FTIR spectrometer.
Alluxa’s unique, purpose-built deposition platform and control systems were designed, developed, and built by our in-house team to address the demanding requirements of the next generation of systems and instruments. We continue to dedicate a large amount of resources to research and development to meet our goals of increasing production capability and continuing to provide > 99% on-time delivery while creating the world’s most challenging filters at breakthrough price points.
Founded in 2007, Alluxa is an ISO 9001:2015 certified, ITAR registered manufacturer of high-performance optical filters and thin-film coatings.
Durable, Front Surface Hard Optical Coatings For Replacing Laminated Soft Coatings
Soft coatings, also known as laminated coatings are well known to possess poor environmental durability, poor temperature stability, low transmission, high optical scatter and low blocking levels, yet they are still widely used due to their low cost, ready availability and legacy status. Alluxa’s proprietary high speed plasma deposition technology for the first time delivers the optical performance and durability of hard coated thin film optical filters at laminated soft coating pricing.
New Metrology Techniques For Advanced Thin Film Optical Filters
Alluxa’s thin film optical filter technology has advanced to the point where the spectral slopes and blocking levels are challenging even the best metrology equipment and techniques. This paper discusses the issues and provides solutions to measuring the spectral response of this new class of high performance filters.
Flat Top, Ultra-Narrow Bandpass Optical Filters Using Plasma Deposited Hard Oxide Coatings
Alluxa’s new class of ultra-narrow filters are designed for applications such as laser clean up, LIDAR, telecommunications and instrumentation and offer the narrowest and “squarest” filter profiles in the visible and NIR as well as transmission levels that approach 100%.
Introduction To Thin Substrate, Dichroic And Polychroic Thin Film Filters Featuring Flatness < 0.1 Waves RMS
Alluxa introduces a new line of thin substrate ultra-flat dichroics and polychroic filters for use in imaging applications that require flatness levels exceeding 0.1 waves RMS per inch. These filters are unique because they achieve flatness by eliminating the high stresses of asdeposited traditional ion-based coating process such as Ion Beam Sputtering (IBS) and Ion Assisted Deposition (IAD). Alluxa’s new technique uses a novel plasma coating process that produces low loss, fully dense dielectric films with essentially net zero stress on the primary coated side. This white paper further discusses their design and use in a variety of applications.
Specifying Plasma Deposited Hard Coated Optical Thin Film Filters
Due to their complex nature and diverse end-use applications, thin film optical filters have always been a challenge to specify. This paper defines the major types of filters and offers guidelines on how to specify key attributes, while also optimizing the cost. The filter types discussed include band pass types of ultra-square high cavity count, ultra-narrow and soft coating replacements, and dichroic and polychroic tilted beamsplitter filters.
Utilizing Precision Infrared Narrow Bandpass And Dual Bandpass Filters Featuring Low OH-Band Absorption
Alluxa’s new precision infrared bandpass and dual bandpass filter technology brings new levels of performance with higher transmissions, steeper slopes, and flatter pass bands than traditional evaporated coatings.
Advanced Plasma Deposition Improves Ultra Narrowband Optical Filters
Narrowband filters are a critical technology for a variety of applications such as lidar (light detection and ranging), laser cleanup, chemical and gas sensing, instrumentation, and astronomy. Creating multicavity filters is a challenge for deposition process control systems. It invariably introduces undesirable ripple, resulting in signal loss in the pass band, the spectral range over which the filter has high transmittance. Alluxa uses a computer-controlled variation on the turning point method of thickness control for each individual layer, where the filter is constantly measured and variations in thickness compensated for, taking into account thickness errors associated with multiple layers.
Ultra-Narrowband Optical Bandpass Filters With Large Format And Improved Temperature Stability
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.
Introduction To Next-Generation Thin-Film Optical Filters For Life Sciences
Fluorescence based systems have revolutionized the way organisms, cells, and biomolecules are visualized and detected. However, challenges that are common in these instruments, such as bleed-through, background autofluorescence, and poor signal-to-noise ratios (S/N), can reduce performance and lead to frustration. Because system performance greatly depends on filter quality, optical filters are arguably the most important component of any fluorescence-based instrument. With that in mind, this application note presents important concepts that should be considered when selecting optical filters for a fluorescence-based system.
Multiband Filters Redefine Performance Standards Across Disciplines
Advances in thin-film technology have given rise to new classes of multiband filters that redefine performance standards and drive innovation across a variety of disciplines. Multiband filters can be categorized into a variety of classes that each presents its own set of fabrication challenges, placing limits on what is practically achievable and affecting the reliability of the thin-film manufacturing process. By understanding the scientific and industrial applications for multiband filters, the various filter classes and manufacturing possibilities are better understood.
Thin-Film Optical Components For Use In Non-Linear Optical Systems
Bio-imaging and detection techniques that use non-linear optical (NLO) phenomena have led to great advancements, such as super-resolution images, label-free visualization of naturally occurring biomolecules, and greater freedom for working with in-vivo samples. This white paper discusses the importance of choosing thin-film optical components for NLO systems to ensure optimal signal strength, resolution, and image quality.
Thin-Film Interference Filters For LIDAR
LIDAR is used for obstacle avoidance in autonomous vehicles, urban planning, security, infrastructure development, and other applications. This app note details how high-performance, ultra-narrowband interference filters improve LIDAR signal-to-noise ratios in specific applications.
Alluxa Introduces HELIX™ Spectral Analysis System For Measuring High-Performance Thin-Film Optical Filters
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.
Thin Film Glossary
This article defines a number of glossary terms related to thin film optical filters and their use.
Utilizing Flow Cytometry Filters
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.
Utilizing Fluorescence Filters For Microscopy And Imaging
Fluorescence microscopes and imaging systems utilize fluorescent biomarkers and fluorescence filter sets to create bright, high contrast images of biomolecules, organelles, cells, tissues, organs, and organ systems. Because image quality is highly dependent on the design and overall performance of the fluorescence filters integrated into these systems, optical filter performance is just as important to the final image as sample preparation and fluorophore selection.
Understanding LIDAR Filters
LIDAR is a highly versatile active remote sensing technique that is used in Earth and atmospheric sciences, autonomous vehicles, urban planning, and many other applications. Some of the most important components of LIDAR sensors are the filters that isolate target signals, while preventing sunlight and other extraneous light from reaching the detector. A wide variety of applications and sensor types exist, from laser altimeters to Raman LIDAR systems, all with different return signal strengths and LIDAR filter requirements. Therefore, LIDAR filters must be designed with the specific application and sensor type in mind in order to maximize signal-to-noise ratio.
Optical Filter Specifications
This white paper covers the basics of a number of optical filter specifications.
What Are Thin-Film Optical Filters?
Thin-film optical filters are made by depositing alternating thin layers of materials with special optical properties onto a substrate, such as optical-grade glass. As light makes its way through the optical filter, its direction changes as it passes from one layer to the next, resulting in internal interference.
Using Next-Generation Thin-Film Optical Filters For Fluorescence Imaging And Detection Systems
Within any fluorescence application, there are three basic filters that are needed for operation – the excitation filter, the emission filter, and the beamsplitter. This white paper further discusses the use of Alluxa’s thin-film optical filters in fluorescence imaging and detection systems.
Alluxa Announces New Online Catalog For Fluorescence Filter Sets
Alluxa, Inc., a global leader in high-performance optical coatings and filters and thin-film deposition technologies, announces an online catalog of fluorescence filters developed for use in COVID-19 testing devices. The ULTRA SERIES – Fluorescence Filter Sets are specifically designed for real-time qPCR (polymerase chain reaction) applications.
Alluxa Develops Thin Films For COVID-19 Detection Devices
Alluxa, Inc., the global leader in high-performance optical coatings and filters, has extended its industry-leading Ultra Series to include high-performance polymerase chain reaction (PCR) specific filters. These filters were developed with higher performance optical characteristics and are intended to improve speed and efficiency of real time qPCR testing for the SARS-CoV-2 virus. The new Ultra Series qPCR product family includes real-time, qPCR-specific filters for integration into medical equipment that performs COVID-19 testing of patient samples.
Alluxa Introduces High Performance 10.6 µm Infrared Notch Filter
Alluxa, Inc., a global leader in high-performance optical coatings and filters and thin-film deposition technologies, introduces a breakthrough 10.6 µm infrared (IR) notch filter with optical density > 4.0 (OD4). The innovative, high-layer-count IR optical coating is produced by utilizing Alluxa’s proprietary deposition capabilities that now deliver groundbreaking optical coating performance in the 8 µm to 12 µm spectral range.
Alluxa Announces New VP Of Operations, Bill Kastanis
Alluxa, Inc., a global leader in thin-film deposition technology and high-performance optical coatings and filters, is pleased to announce Bill Kastanis as the new vice president of operations, effective immediately. A highly-respected veteran in optics and photonics, Bill has over 35 years of experience in operations, vacuum deposition, and factory automation.
Alluxa Promotes Kevin Nolen To Director Of Engineering
Alluxa, Inc., a global leader in high-performance optical filters and optical coatings, is pleased to announce the promotion of Kevin Nolen to director of engineering, effective immediately. Kevin has served in a variety of engineering and operations roles at Alluxa for more than 12 years. He will be responsible for guiding and executing Alluxa’s developmental engineering efforts that support factory automation, deposition process improvements, and product engineering projects. Kevin has a BS ME from California State University, Chico.