In the datasheet we can find explanation such as characteristics, specification, signal, and sensor. The datasheet gives the reader discussion related to optical characteristics, measuring distance, and specifications.
Lots of information about responsibility, data, electro optical characteristics, and distance are described inside the datasheet. Below are taken from the datasheet:
The circuit application examples in this publication are provided to explain representative applications of SHARP devices and are not intended to guarantee any circuit design or license any intellectual property right. SHARP takes no responsibility for any problems related to any intellectual property right of a third party resulting from the use of SHARP devices. SHARP reserves the right to make changes in the specifications, characteristics, data, materials, structures and other contents described herein at any time without notice in order to improve design or reliability. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
In addition, this datasheet gives the reader discussion about optical, measurement, and circuit.