Technical Articles

  1. Faster, Smaller Delay Lines Drive OCT Applications Further

    Optical coherence tomography (OCT) can be used in many medical applications including displaying real-time details of eye diseases, detecting skin cancer, or monitoring heart surgery. The OCT market is set to grow even further over the next few years as the efficiency and effectiveness of imaging improves.

  2. FM Spectroscopy With Tunable Diode Lasers

    Frequency-modulation spectroscopy (FMS) offers high sensitivities and a simple setup, especially with tunable diode lasers. This application note explains the essential elements of the physics of FMS and the basic physics of FM “saturation” spectroscopy.

  3. Practical Uses And Applications Of Electro-Optic Modulators

    The purpose of electro-optic amplitude and phase modulators is to allow for the electrical control of the amplitude, phase, and polarization state of an optical beam. These external types of modulators do not cause any degrading effects on the laser linewidth and stability, unlike direct modulation techniques. This white paper discusses the electro-optic effect and describes the practical uses and applications of bulk electro-optic modulators.

  4. Forensic Investigations Using Thermography And Steam

    Investigators are continuously searching for an optimal solution for finding concrete blood evidence in less-than-ideal circumstances. This is especially important when working with fabrics carrying diluted blood stains, which could easily be affected by the common practice of adding liquid luminol.

  5. Catnip Cultivation May Offer Natural Mosquito Repellent Alternative

    Mosquitos cause constant concern in tropical regions since they can carry deadly diseases such as Malaria, Dengue Fever, and the Zika virus. Amid the global efforts to control outbreaks of Zika and other mosquito-borne diseases, new efforts are being made to develop natural mosquito repellents that can grow easily in affected regions. Some plant-based repellents can be initially as effective as DEET, but most evaporate too quickly and leave the user unprotected. One plant that shows promise is catnip. Researchers have developed a “super-catnip” with enhanced bioactive compounds while making it easier to grow commercially.

  6. Designing For Moldability: Volume 1 - A Rapid Injection Molding Reference Guide For Product Designers And Engineers

    This quick-reference user guide, for engineers and designers, talks about the guidelines and limitations for rapid injection molding. Learn how to get the best possible results for your real plastic molded parts.

  7. No, Not That One: Imaging Systems And The ‘Other’ Fiber Optics

    Well known as an enabling technology of telecommunications, fiber optics is also playing a pivotal role in imaging. This paper takes a closer look at the “other” fiber optics, illuminating the special qualities that make it the best solution for some of imaging’s most challenging problems and environments.

  8. Testing High-Volume LED Luminaire Builds

    The lower operating costs of LED luminaires drive growing demand for them in consumer and commercial markets. This increased demand requires an adaptation to improved quality testing methods that can provide superior measurements and not slow down the process of production. 

  9. Assuring Correct Metallurgy In Direct Laser Melting

    High quality 3D laser printed processes require a laser that delivers the correct amount of power that is distributed correctly and focused at the correct location. To ensure consistent and structurally sound parts and correct metallurgy, the right parameters should be directly measured before and after any critical part is made in direct laser sintering. This application note presents how Ophir Optics’ BeamCheck system is able to measure critical laser beam parameters for laser-based additive manufacturing.

  10. Math, Magic And MTF: A Cheat Sheet For The Vision System Community

    MTF is the best proxy for lens performance, but the math behind it and the graphs that depict it often obstruct understanding. This paper demystifies MTF, arming vision system decision makers with the knowledge they need about it to choose the right lens every time.