Abstract: An optical film used as a lens comprises at least a plastic layer (1) and a photochromic layer (2), the photochromic layer (2) is boned between two plastic layers (1) such that avoiding non-uniform dyeing and preventing the photochromic layer (2) from breaking off. One of a Polarizing layer (3), a UV absorbing layer (4) and a dying layer (5) or any combination of them can be also bonded between the two plastic layers (1).

Abstract: A multi-functioned flashlight for vehicle rescue use is comprised of a cylinder body with lighting components installed inside its cylinder head, whereof its cylinder head is externally installed with a protruded knocking cone piece and a dismountable cone cover. Its cylinder body is installed with a flash bulb and its flash circuit internally and a flash transparent piece externally. The tail part of the cylinder body is installed with a guard piece with a blade installed in-between with its cutting edge facing outwards. Thereof, it is characterized in that a micro-generator and its gear transmission set are installed inside the cylinder body; the output ends of the micro-generator are electrically connected with the charging circuit and its charging batteries; and the cylinder body is externally installed with a swing arm whose rotating head is through the mounting hole on the cylinder body to engage with the gear transmission set.