Technical Articles

  1. Noise In Spectrometers: Part 1

    Noise is an undesirable signal that is completely lacking in information or structure, and potentially taking away from the desired signal’s quality and accuracy. Spectrometer noise, in particular, is caused by mechanical vibrations or environmental electrical fields, for example, from AC power lines. So what does this noise have to do with everyday applications? Perhaps more than you think. This application note is the first part in a series discussing the noise within spectroscopy systems used for ordinary applications, such as making sure the pool is clean after a large family gathering.

  2. Utilizing Silicon Photodiodes For Gamma Ray Detection

    First Sensor’s X100-7 is an expansion of their detector series for ionizing radiation. It is designed to target high volume gamma detection applications by combining low dark current and low capacitance silicon photodiodes with reliable and cost-efficient packaging. Awareness has been raised in regards to risks from nuclear radiation, creating an additional demand for commercial and personal radiation detection devices.

  3. PIN Photodiode Array With Guard Ring Application Note

    This application note provides a list of tips for operating a PIN photodiode array with a guard ring in a range of applications, as well as an overview of each PIN diode series and their responsivity and quantum efficiency.

  4. PIN Diode With Guard Ring Application Note

    This application note provides a list of tips for operating a PIN diode with a guard ring in an array of applications, as well as an overview of each PIN diode series and their responsivity and quantum efficiency.

  5. History And Development Of EMCCD Technology – What Is Gen III?

    The earliest versions of EMCCD (Electron Multiplying CCD) sensors offered a new dimension in imaging that eliminated read noise from an image sensor, and enabled the required combination of extreme sensitivity and fast frame rates for advanced ultra-low light applications. Raptor Photonics now offers the next generation in EMCCD with higher resolution, smaller pixels, faster speeds without overclocking, and lower voltages on the EM gain register. This application note provides a comparison between the first, second, and third generations of EMCCD technology, and an overview of the Falcon III that uses the newest generation of EMCCD.

  6. Eye Surgery Using Excimer And Femtosecond Lasers

    In ophthalmology, lasers are used for refractive surgery to burn, cut, or remove objects to achieve optimal refractive power. This article discusses the use of excimer and/or femtosecond lasers in multiple types of operations to correct defective vision

  7. Fast Optical Alignment For SiP Production

    Testing and packaging of silicon photonics elements requires nanoscale alignments that cannot be performed using visual or mechanical references. This article presents PI’s solution  for fast, parallel, nanoscale-accurate, multi-DOF global optical alignment optimization.

  8. Direct Imaging Of Shale Gas Leaks Using Passive Thermal Infrared Hyperspectral Imaging

    Many types of natural gas from shale formations, including methane (CH4), are odorless, colorless, highly flammable, and leaks/emanations are important considerations for safety and the environment. Telops has recently launched the Hyper-Cam Methane, a field-deployable thermal infrared hyperspectral camera specially tuned for detecting methane infrared spectral features under ambient conditions and over large distances. This application note illustrates the benefits of using this imager a site where shale gas leaks unexpectedly happened during a geological survey near the Enfant-Jesus hospital in Quebec City, Canada, during December 2014.

  9. Hyperspectral Imaging Reveals New Information For Unmanned Aerial Vehicles

    The human eye is an important instrument for gathering information about the world, but it has limitations and obviously varies from person to person. It sees only over a particular range of wavelengths and has a limited ability to distinguish very similar colors. Hyperspectral imaging technologies provide a solution for overcoming these limitations, revealing data that the eye alone cannot capture. This article presents and discusses the new information that hyperspectral imaging brings to unmnanned aerial vehicles.

  10. Short-Wave Infrared Adaptive Optics And Applications

    Adaptive optics (AO) is a technique used to measure wavefront errors or distortions in imaging, and to correct resulting images in real time. This article introduces adaptive optics and focuses on the benefits of using (short-wave) infrared cameras in wavefront sensing for key applications, including astronomy, laser communication, biological imaging microcopy, and retinal imaging in combination with optical coherence tomography. It also covers the fundamental performance characteristics of SWIR cameras used in adaptive optics applications.