Technical Articles

  1. Frictionless Precision Motion Control Based On Air Bearing Stages - Key Element In Coordinate Measuring And Surface Metrology Applications

    The performance of precision metrology equipment such as coordinate measuring machines (CMM) depends on highly accurate, repeatable, and controllable motion systems and position sensors. Air bearings have played a critical role in the development and construction of CMMs and other metrology tools. They are inherently frictionless, highly stable, geometric precision straightness, and flatness for linear bearings.

  2. Automotive Precision Assembly: Hexapod 6-Axis Parallel Machines Add High Precision To Conventional Robots

    The need for advances robotics with high precision and alignment requirements continues to grow in the automotive industry. Many traditionally used articulated-arm robots are fast and can handle heavy loads, but they lack positioning accuracy. In the past, hexapod parallel kinematic robots were considered overkill for the automotive industry. Now, however, the situation is rapidly changing. This white paper describes the major benefits that hexapod 6-axis parallel machines have for conventional robots in automotive precision assembly lines. 

  3. Engineered Precision Motion Design Benefits From Systems Approach

    When controlling motion at the sub-micrometer or nanometer levels for alignment and handling applications, it is imperative to have high reliability, robustness, minimized latency, and high-speed synchronization with external devices to reach sub-micrometer path accuracy. The higher the dynamics and throughput targets of a multi-axis precision motion system, the more holistic the design approach must be in order to achieve success. A systems approach where the mechanics, control electronics, and software are designed by the same team provides a great amount of benefits for the user.

  4. When Lightning And Rods Connect

    There are many challenges associated with recording lightning via high-speed video images, including placing the camera close enough to the chosen structure in an observable way, and the filming process requiring a long observation time to capture the strike – if it happens at all. Now, for the first time, a team of researchers has captured lightning striking a rod using Vision Research’s high-speed cameras. The results not only broaden the understanding of how lightning connects with lightning rods, but also provide the field data necessary to improve current lightning protection systems.

  5. The Instrument Transfer Function

    An interferometer is a common instrument for measuring optical surfaces to very high precision that can be applied with care to enable extremely low uncertainty measurements to address tight metrology requirements. The ability of an interferometer to quantify mid-spatial frequency content is defined not only by its sampling density (camera resolution), but also by the many critical design aspects of the optical illumination and imaging system. The instrument transfer function (ITF) quantitatively characterizes the response of the instrument as a function of spatial frequency.

  6. Selecting The Right Hyperspectral Imager Is Key To Bringing Critical Data Into View

    Hyperspectral imaging is a valuable technique for revealing data the eye alone cannot capture. Now, a new class of hyperspectral imaging systems is taking things one step further by addressing image quality issues and enabling further ease-of-use. 

  7. Fiber Optic Sensing

    The two types of sensing include local measurement points and distributed sensing. This paper presents the technical basics behind sensing over fiber technologies, its main applications, and the cabling solutions involved.

  8. Understanding LIDT Laser Optics For High Power Lasers

    To analyze the specific damage characteristics of high power laser optics, it is important to understand the Laser Induced Damage Threshold (LIDT), an analytical threshold determination method that can reveal damage diagnostics, and its testing provides a lower-cost option for coating development. This paper details the different test types of LIDT, how to measure the optical thresholds, how to identify defects within high power lasers, and more.

  9. Why SWIR And InGaAs Are Useful

    Sensing in the shortwave infrared (SWIR) range (wavelengths from 0.9 to 1.7 microns) has been made practical by the development of indium gallium arsenide (InGaAs) sensors. This white paper covers the importance of using InGaAs technologies in SWIR applications.

  10. Understanding Latency In Real-Time Imaging Systems

    Latency performance data helps imaging system designers to determine how quickly a system can process, analyze, and in some applications display images. The lower latencies are critical for applications requiring higher-speed quality inspections, including image-guided surgery, and military systems where end-users need real-time imaging data to make decisions. This paper provides an overview on the constituent elements of latency, and delivers latency test results for image transfer over a GigE Vision link.