Abstract: The present invention provides a laser transmitting circuit, a laser receiving circuit, a distance calculation circuit and devices thereof. The laser transmitting circuit comprises an energy storage capacitor, a laser transmitting tube, an MOS switch circuit and an MOS switch driving circuit. The laser receiving circuit comprises a laser receiving tube, a first low-noise triode, a second low-noise triode and a low-noise wideband amplifier. The distance calculation circuit comprises a singlechip, a programmable logic circuit, a clock source and an echo identification circuit. The present invention further provides a low-voltage power circuit that provides a reverse polarity protection to an external power supply without additional diode connected in reverse polarity. According to the technical solutions provided by the present invention, the measurement range and precision of a semiconductor laser rangefinder can be improved effectively.

Abstract: A transmission-type OLED riflescope with a prism assembly having an ocular lens and an objective lens, wherein the prism assembly has a roof prism, a half pentaprism, an isosceles prism and a spectro-film, and the right end of a laser receiver abuts against the left end of the isosceles prism so that both of the laser receiver and the isosceles prism are located below the axis of the lens cone while the laser transmitter is located above the axis of the lens cone with the laser transmitted from the laser transmitter exiting after being refracted by the objective lens, while a transmission-type OLED display is arranged between the ocular lens and the prism assembly. Functions of the riflescope include observing, aiming, and laser ranging and transmission using the same objective lens. The viewer can also see the objects behind the lens.

Abstract: A transmission-type OLED riflescope with a prism assembly having an ocular lens and an objective lens, wherein the prism assembly has a roof prism, a half pentaprism, an isosceles prism and a spectro-film, and the right end of a laser receiver abuts against the left end of the isosceles prism so that both of the laser receiver and the isosceles prism are located below the axis of the lens cone while the laser transmitter is located above the axis of the lens cone with the laser transmitted from the laser transmitter exiting after being refracted by the objective lens, while a transmission-type OLED display is arranged between the ocular lens and the prism assembly. Functions of the riflescope include observing, aiming, and laser ranging and transmission using the same objective lens. The viewer can also see the objects behind the lens.