Abstract: The present disclosure discloses a common-path high-repetition-frequency lunar laser ranging system and method. In the system, a kHz laser, a beam expanding negative lens, a beam expanding positive lens and a laser docking mirror are sequentially arranged along the optical path direction; the laser beam emitted by the kHz laser enters a telescope through the laser docking mirror after passing through the beam expanding negative lens and the beam expanding positive lens, and then is emitted to a lunar retro-reflector; the beam expanding negative lens and the beam expanding positive lens are arranged in a confocal manner; a beam splitter, a focusing lens, a rotating shutter, an adjustable diaphragm, a collimating lens, an optical filter and a detector are sequentially arranged along the optical path direction; the adjustable diaphragm is installed at the common focus of the focusing lens and the collimating lens.

Abstract: According to the present invention, when the notification of the electronic mail reception is received while receiving the television broadcast and the contents of the received electronic mail are browsed, the contents of the received electronic mail can be browsed by the easily and reliably executable user operation without obstructing the watching and listening of the television broadcast. A mobile terminal apparatus comprising: television-broadcast receiving means for receiving television broadcast; electronic-mail transmitting and receiving means for transmitting and receiving an electronic mail; information display means for performing display of various types of information, and sensing a tactile sensation; and control means for controlling display of the information display means.