Blogs
Displacement Measurement by Fiber Optics
Displacement Measurement by Fiber Optics Semiconductor, Research & Development 3D IC Construction Displacement, Vibration Description The Fotonic™ Sensor is a non-contact instrument which uses the fiber optics lever¬π principle to perform displacement, vibration and surface-condition measurements (Figure 1). The Fotonic Sensor transmits a beam of light through a flexible fiber-optic probe, receives light reflected from a target surface, and converts it into an electrical signal proportional to the distance between the probe tip and the target being measured.¬† The output signal voltage from the fiber optic sensor is then used [...]
LITHOGRAPHY OPTICS POSITION FOCUS
Industry Semiconductor Applications Photolithography Using Capacitance Sensors Measurement Type Positioning Description One specific area where capacitance systems excel is high resolution focusing of complex lens systems such as those found in atomic force microscopes, vision inspection machines and photolithography tools. In a multi-million dollar photolithography tool, high accuracy, nanometer resolution and maximum thermal stability are absolutely critical to maintain proper focus and obtain integrated circuit line widths as small as 45 nanometers. Additionally, most systems demand low power consumption and maximum heat dissipation to eliminate any adverse affects from [...]
MicroTrak 4 Over a LAN for Ethernet Signaling
MicroTrak 4 Over a LAN for Ethernet Signaling Semiconductor, Research & Development 3D IC Construction Distance, Positioning, Displacement Description The MicroTrak 4, which is a USB device, can also be used over a LAN or even CAT 5e/6/7 wiring with additional hardware to convert the USB sensor to Ethernet signaling. The devices required to run over the LAN or direct CAT wire are Icron USB 2.0 Ranger 2301GE-LAN extender system. The MicroTtrak 4 basic software then runs on the host computer.  The LAN does not have to be dedicated; it [...]
Monitor Roller Gaps and Parallelism
Monitor Roller Gaps and Parallelism Industrial Printing, Calendering, Crushing Gap Easy Roller Gap Measurement Ensures Calendering Success Many roll-to-roll finishing processes typically use a calender, or series of hard pressure rollers, to deliver smooth, high-quality products of plastic, textile, or paper (Fig 1). Ensuring a consistent material thickness, however, depends on the ability to monitor, and maintain, a precise gap between rollers. This application note describes a quick and easy means for roller gap measurement. Figure 1: Calender Rollers where consistent gap across the rollers are vital [...]
GAAS SUBSTRATE THICKNESS MEASUREMENT
Industry Semiconductor Applications Gaas Substrate Thickness Measurement Measurement Type Thickness Description Measuring Thickness of Wafers with Different Chemistries Introduction: Silicon wafers are ordinarily highly conductive and easy to measure with standard capacitive displacement sensors (See MTI’s Proforma 300i). Measuring the thickness of GaAs wafers that have high bulk resistivity (>10k Ohm/cm) is a little more difficult because the wafers act as non-conductive insulators in a capacitive sensor’s measuring field. Fortunately, MTI has a solution to this problem. Solution: It’s possible to measure the thickness and TTV of high resistivity semiconducting wafers (like GaAs) using non-contact capacitive [...]
Capacitance Probes Measure Gaps in Rotating Environments
Capacitance Probes Measure Gaps in Rotating Environments Textiles, Industrial Optimizing Performance of Rotating Cylinders Gap Description [Application Note 72518] Sensor environments are not always ideal. Across the various Gap sensor applications conditions may vary drastically. Some setups may have requirements of miniaturization, and others of wireless signal propagation. In rotating environments where cables cannot go, often there is a need for both. Problem Traditional sensing solutions can’t be used in environments requiring wireless propagation such as inside a rotating body. In these situations, the size and power requirements restrict the [...]
Signal Generator Simulates Gas Turbine Speed Signals
Signal Generator Simulates Gas Turbine Speed Signals Aviation, Power Generation Simulation of Speed Signals Amplitude, Displacement Description [Application Note 61318] Gas turbine engines are complex machines comprised of two rotating sections, generally referred to as the low pressure compressor (N1) and the high pressure compressor (N2). These turbine sections feature separate shafts that produce unique tachometer signals. Gas turbine engines have multiple rotating sections generally referred to as the low pressure compressor (N1) and the high pressure compressor (N2). These turbine sections have separate shafts that produce unique tach [...]
SPINDLE RUN OUT
Industry Automotive Applications Spindle Run Out Measurement Type Positioning Description Rotating targets frequently have an intermittent, uncertain or nonexistent ground path. This introduces unwanted noise, instability, drift and reduces accuracy of the measurement. MTI Instruments offers a unique “Push-Pull” capacitance measurement system that does not require a grounded target. It utilizes two probes, built into one body, that work together to complete the ground path. One probe pushes current into the brake rotor while the adjacent probe pulls the current out. The result is a “clean”, consistent electrical sensing path. As [...]
Signal Generator Tests Charge Amplifier Gain, Frequency Response GallerySignal Generator Tests Charge Amplifier Gain, Frequency Response
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Signal Generator Tests Charge Amplifier Gain, Frequency Response
Testing Charge Amplifier Gain and Frequency Response with a Signal Generator Aviation/Aerospace, Industrial, Power Generation, Research & Development Charge Amplifier Gain and Frequency Response Testing Amplitude (Acceleration, Vibration, Pressure) Description [Application Note 40518] Piezoelectric transducers produce small electrical charges in response to pressure. Their sensitivity, ruggedness, and stability at high temperatures make them an essential building block of many accelerometers and pressure sensors. Applications include turbine vibration measurement (accelerometers) and combustion dynamics monitoring (pressure sensors). Typically, the high-impedance charge output produced by a piezoelectric transducer must be conditioned and amplified [...]
Capacitance Sensors Track Brake Rotor Thickness Variation
Capacitance Sensors Track Brake Rotor Thickness Variation Automotive, Aviation/Aerospace Brake Rotor Testing & Manufacturing Displacement, Amplitude Description [Application Note 51018]Today’s cars and trucks offer unprecedented fuel efficiencies and handling characteristics – thanks, in part, to vehicle lightweighting. Applied to all vehicle components, lightweighting lowers stress and strain to improve mileage and boost overall performance.In keeping with this trend, today’s brake rotors are thinner and lighter than those of just a few years ago. In addition, many feature cooling vents to further improve performance. These changes, however, reduce available braking surface, forcing [...]