초록 ▼

A coherent laser radar system includes a pulsed laser oscillating a pulsed laser beam which is split into two parts by an optical divider. A first part of the two is transmitted as a transmitted beam via a beam splitter. A second part is supplied to a delay line via a coupling optics and others to b

A coherent laser radar system includes a pulsed laser oscillating a pulsed laser beam which is split into two parts by an optical divider. A first part of the two is transmitted as a transmitted beam via a beam splitter. A second part is supplied to a delay line via a coupling optics and others to be delayed by a predetermined time as a local beam, and is incident onto an optical coupler. The received beam from the target is incident onto the optical coupler via a scanning optics and so on. A photodetector carries out the coherent detection of the light beam coupled by the optical coupler. A signal processor computes a target velocity and the like from a signal generated by the detection and converted into a digital signal by an A/D converter. This makes it possible to solve a problem of a conventional system in that the system configuration is complicated and expensive.

대표청구항 ▼

1. A coherent laser radar system comprising:a pulsed laser for oscillating a single wavelength pulsed laser beam; optical dividing means for dividing the pulsed laser beam oscillated by said pulsed laser, and for outputting first part of the pulsed laser beam as a transmitted beam and second part of

1. A coherent laser radar system comprising:a pulsed laser for oscillating a single wavelength pulsed laser beam; optical dividing means for dividing the pulsed laser beam oscillated by said pulsed laser, and for outputting first part of the pulsed laser beam as a transmitted beam and second part of the pulsed laser beam as a local beam; transceiver optical means for transmitting the transmitted beam to a target, and for receiving a light beam from the target as a received beam; a delay line for delaying the local beam output from said optical dividing means; optical coupling means for coupling the received beam with the local beam output from said delay line; a photodetector for carrying out coherent detection of a light beam output from said optical coupling means; and a signal processor for obtaining physical information about the target from the signal passing through the coherent detection by said photodetector, wherein said delay line further comprises: an optical divider for dividing the local beam output from said optical dividing means into n local beams, where n is a positive integer greater than one; n delay lines for providing the n local beams with different delay times; and an optical coupler for coupling the n local beams delayed by said n delay lines.