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  • Non-Contact Thickness Measurement of Semiconductor Wafers
    Wafers, Optical Disks) showed that there is no need to recalibrate the probes for changes in target material. Electrically grounding the measurement stage or leaving it un-grounded also had no effect on measurement accuracy. Thickness measurements were taken using every portion of the voltage output
  • Fast Response Optical Sensors Prove Invaluable in Demanding Gaging Applications
    . Typical frequency response of the sensor is 150 kHz, however, special systems are available that can exceed 1 mHz. Application Notes: Non-contact Measurement Sensors, Solutions and Systems - MTI Instruments.   . Is Optical Displacement Sensing for You?. Non-contact displacement and vibration sensors
  • Noncontact measurement of central lens thickness
    . Summary. For thickness measurement, a lens is placed in a position. The measurement technique introduced here offers a means. aligned with the probe’s optical axis (figure 5). The radius. for noncontact, fast and precise thickness measuring of. of curvature of the upper lens surface has to be entered
  • Position Sensing and Feedback for Contouring Applications, August 2012
    at the individual technologies in detail, along with the type of. applications, they can be used in. It is however important to note that the first two. types of sensing technologies are non-contact sensing and the latter is contact. sensing. Optical sensing. The principal of optical sensors is simple
  • Ultra-Precise 6D-Measuring System for Optical Surfaces (.pdf)
    Inserts for precision optical molds. make high demands on the testing. process. Today, such testing can. easily be automated with the help of. interferometric measuring devices. Parallel-kinematics Hexapod 6-axis. alignment systems even make it. possible to integrate testing directly
  • Opto Sensors - Typical Applications
    to an optical signal, and a light receiving element which transforms the optical signal to an electrical signal. Both of these elements are housed in one package, making the opto sensor essentially a non- contact switch. Opto sensors detect presence, length, number, etc., of objects, using visible
  • Laser Triangulation Sensors
    variety of surfaces because only the highest charged pixels from the reflected beam are used to calculate position. The lower charged pixels are usually energized by unwanted reflections from changing optical properties of the surface being measured and can easily be ignored during signal processing
  • Using the Accumeasure 9000 Capacitance Transducer Amplifier to Measure Position and Vibration Displacement of Very Small Targets
    required measurement of the position and vibration displacement amplitude of taut wires .002" to .005" (50 to 125 microns) in diameter. After several unsuccessful attempts at making this measurement using a variety of conventional noncontact sensors employing magnetics, optical, and capacitance

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