Coherent laser radar system and target measurement method

A coherent laser radar system includes a pulsed laser (1) oscillating a pulsed laser beam which is split into two parts by an optical divider (2). A first part of the two is transmitted as a transmitted beam via a beam splitter (3). A second part is supplied to a delay line (11) via a coupling optic...

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Bibliographische Detailangaben
Hauptverfasser:	OOGA, YASUISA, ASAKA, KIMIO, HIRANO, YOSHIHITO, YANAGISAWA, TAKAYUKI, SUGIMOTO, ETSUO, WADAKA, SHUSOU
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BASIC ELECTRIC ELEMENTS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	A coherent laser radar system includes a pulsed laser (1) oscillating a pulsed laser beam which is split into two parts by an optical divider (2). A first part of the two is transmitted as a transmitted beam via a beam splitter (3). A second part is supplied to a delay line (11) via a coupling optics (9) and others to be delayed by a predetermined time as a local beam, and is incident onto an optical coupler (8). The received beam from the target is incident onto the optical coupler (8) via a scanning optics (6) and so on. A photodetector (12) carries out the coherent detection of the light beam coupled by the optical coupler (8). A signal processor (14) 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 (13). This makes it possible to solve a problem of a conventional system in that the system configuration is complicated and expensive.