In conjunction with MR-OCT, the scan range of maximum 200 μm can be enhanced up to 1–1.5 mm by using a reduced amount of orders of reflections, which could be of interest to increase sensitivity in the future. It was found that the APA provides more than twice the mechanical scanning range compared to other opto-mechanic actuators, but results indicate degradation of signal-to-noise ratio and sensitivity at larger imaging depths. Application of Fiber Optic Sensor and Piezoelectric Actuator to Flutter Suppression Real-Time Virtual Sensing for Dynamic Vibration of Flexible Structure via. The sensitivity was measured with and without the partial mirror in the reference delay line as a function of scan speed, frequency, and range, therefore providing results for MR-OCT and TD-OCT modes. A silver-coated miniature mirror was attached to the APA via ultraviolet-cured optical adhesive, and the light source was a super-luminescent diode with 1310 nm center wavelength and 56 nm bandwidth. The scanning amplitude of the used APA was varied between 30 μm and 250 μm, depending on the scanning frequency of between 0.8 kHz and 1.2 kHz. MR-OCT is a compact optical imaging device based on a recirculating reference-arm-scanning optical delay using a partial mirror that can enhance the imaging depth range by more than 10 times the reference mirror’s scanning amplitude. The characterization of an amplified piezoelectric actuator (APA) as a new axial scanning method for multiple-reference optical coherence tomography (MR-OCT) is described. Note: Author names will be searched in the keywords field, also, but that may find papers where the person is mentioned, rather than papers they authored.Use a comma to separate multiple people: J Smith, RL Jones, Macarthur.Use these formats for best results: Smith or J Smith.For best results, use the separate Authors field to search for author names.Use quotation marks " " around specific phrases where you want the entire phrase only.Question mark (?) - Example: "gr?y" retrieves documents containing "grey" or "gray". Asterisk ( * ) - Example: "elect*" retrieves documents containing "electron," "electronic," and "electricity". Improve efficiency in your search by using wildcards.Example: (photons AND downconversion) - pump.Example: (diode OR solid-state) AND laser.Note the Boolean sign must be in upper-case. Separate search groups with parentheses and Booleans.The Picomotor actuator offers the additional advantage of using the integrated knobs for quick, manual adjustment of all axes. Keep it simple - don't use too many different parameters. Our Picomotor actuators allow for an angular resolution of 0.7 rad, allowing for very small, controlled movements of your optics.In closed-loop mode, the slow response of the feedback loop puts another limit on the bandwidth. Also please note that these calculations only apply for open-loop systems. Note: For these calculations, it is assumed that the absolute maximum bandwidth of the driver is much higher than the bandwidths calculated, and thus, driver bandwidth is not a limiting factor. Hence, for an instantaneous voltage change from 0 V to 75 V, it would take 3 ms for the output voltage to reach 75 V. The larger the capacitance, the more current needed:įor example, if a 100 µm stack with a capacitance of 20 ♟ is being driven by a BPC Series piezo controller with a maximum current of 0.5 A, the slew rate is given by The change in charge, dV/dt, is called the slew rate. To drive the output capacitor, current is needed to charge it and to discharge it.
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