Researchers at Brown University and Osaka University have developed a technique to polarize light for terahertz waves using a new type of beamsplitter made from stacks of spaced metal plates.
A new type of 3D display being developed by researchers at the University of Illinois at Urbana-Champaign could pave the way for augmented reality (AR) and virtual reality (VR) headsets that do not cause headaches, nausea and eye fatigue symptoms commonly reported by users.
Since the excitation source laser intensity is often six to eight orders of magnitude greater than the Raman scattered signal, edge pass filters are required to block the wavelength of the scattered laser beam while transmitting the wavelength shifted Raman scattered signal.
PIXELTEQ micro-patterned optical coatings combine patented microlithography expertise with state-of-the-art coating technology. These micro-patterned filters help create compact and cost-effective optical devices for use in biomedical, security and defense, aerospace, precision agriculture and machine vision applications.
Continued improvements in multilayer thin film filter (TFF) design and manufacturing methods — such as in-situ optical monitoring and automated coater control with dynamic design adjustment — have enabled successful production of optical filters with increasing control over the spectral shape.
Fundamental to most Raman microscopy applications is the desire to access as much of the Raman fingerprint of the molecule of interest as possible, requiring filters that provide “more signal with less background.” In order to optimize the capture of this very-low wave number Raman signal, a premium is put on edge pass filters with extreme steepness, very precise edge wavelength control, and deep blocking of the excitation laser. This article provides an in-depth discussion of optical filters for Raman analysis, addressing filters for both bench-top and portable Raman applications.
DELTA Light & Optics, http://www.filters.madebydelta.com, has opened an office in North America to support their expanding customer base for linear variable filters and advanced optical filters and components.
Optical filters play a key part in providing wavelength selections in earth-observation systems, but they provide a unique challenge in space-based applications. At Photonics West 2017, Jason Palidwar with Iridian Spectral talked to us about some of those challenges, and how his organization has addressed them.
Jason Palidwar with Iridian Spectral Technologies spent some time with us on the last day of SPIE’s 2016 DCS exhibition to talk about the challenges encountered in the mid-wave spectrum and how his company has worked around them.
Jason Palidwar of Iridian Spectral kicked off our DSS exhibition coverage by giving us a closer look at what they’re showcasing this year.
Iridian Spectral has been busy expanding its product offerings, and Hongbai Lao was kind enough to show us what the company was featuring at the show.