The invention discloses an automatic dust and
pollution prevention device of an optical device. A device (such as a camera shooting instrument, a
laser distance measuring
machine, an
infrared detector, an optical sensor and other light receiving and emitting devices) provided with the optical window is placed in a sealed protection shell, a thin film optical window is arranged on the wall face, opposite to the optical window, of the sealed protection shell, and thin film paper arranged in the thin film optical window has the automatic updating function. Therefore, the automatic dust and
pollution prevention device can effectively overcome the technical defects that in the prior art, the optical window of a lens, an optic and the like can not be automatically cleaned and maintained and air and water need to be supplied to devices of the optical window of the lens, the optic and the like, and solves the technical problem that the optical window of the lens and the optic and the like can not be cleaned and maintained when the device provided with the optical window is installed in field high air, special fields and dangerous environments. Besides, the automatic dust and
pollution prevention device of the optical device has the advantages of being reasonable in design, high in universality, wide in application range, small in size, compact in structure, high in
automation degree, convenient to use and maintain and the like.