Understanding the role of unsteady flow phenomenon on the performance of an airfoil requires spatially- and temporally-resolved measurements of fluid dynamic properties at the surface. Such interactions are especially of interest to the gas turbine engine community in regard to the role of unsteady pressure oscillations in fan blade fatigue. A micro-machined array of optical pressure sensors has been developed to address this measurement need. Each sensor element in the array consists of a Fabry-Perot etalon fabricated from single-crystal silicon. An applied pressure deflects a membrane, changing the length of the etalon and modulating its reflectivity. Illuminating the sensor array with a near-infrared diode laser and detecting the reflected light intensity with an infrared camera allows remote, simultaneous recording of the reflectance signals from the entire array of passive sensors. A sensor design meeting the requirements of the fan blade application is presented as well as test results demonstrating its performance. unsteady pressure fluctuations on the surface of a compressor or turbine blade can lead to vibration and eventual failure due to fatigue. Understanding how time-varying loads on the surface couple into the vibrational modes of the blade structure requires time-resolved measurements of the surface pressure distribution.