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The design schematics of the detachable attachment integrated with force sensors. (A) The overall design of the snap-on attachment that fits to the OCT probes. (B) The cross-sectional view of the design. (C) The perpendicular view at the level of the layout of three sensors, above the glass window, within the attachment. (D) Sensor resistance measurement and resistance-pressure conversion circuit, where R1 = R2 = R3 = 3.3kΩ.
