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Currently, the touch panel is used in various products. However, the size of the device is determined by the size of the touch panel. As a touch panel which is not to depend on the device size, the projection type touch panel exists. However, the projector is difficult to set to anywhere. Recently, devices called laser keyboard have been proposed. It can be used as a touch panel using the method of any space by using the laser and the optical sensor. However, miniaturization is difficult because it uses the principle of triangulation to detect the finger position. In this study, we propose a two-dimensional coordinate acquiring device using ultrasonic sensors and PSD sensor there. Without using triangulation by combining the optical sensor and the ultrasonic sensor, two-dimensional coordinates of the finger against any surface can be acquired. Since our device does not need a distance between the sensor and the laser, the size of the product employing our device can be shrunken more. In other words, our device can be embedded to the small factor product easily.

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