differential laser gyro的意思|示意

Differential laser gyro (DLG) is a modern version of the familiar gyroscope that uses laser interferometry for measuring relative rotations between two points in space. It is based on the Sagnac effect, which is the difference in the travel times of a light beam around a closed path determined by the rotation of the closed path.

A DLG typically consists of two optics and a laser source. The first optics, known as the “star optics”, splits the laser beam into two beams, both of which are directed to the second optics (the “detector optics”). The detector optics then combines the two beams in order to measure the relative rotation of the two components of the device. The device is typically used in navigation and guidance systems, as DLGs can provide accurate measurements of angular motion in both static and dynamic conditions.

In addition to its use in navigation and guidance systems, DLGs are also used in a variety of other applications, including inertial navigation systems, robotic sensing and control, and medical imaging and diagnostics. DLGs are also used in aircraft, where they are used as attitude reference systems. DLGs have been used to measure movements of the Earth's surface, ocean depths, and for seismic studies, as well as for measuring the rotational velocity of aircraft engines.

In summary, the differential laser gyro is an important tool for measuring angular motion in various applications, and can be used to measure motion in both static and dynamic conditions. It is an important component of navigation and guidance systems, robotic sensing and control, medical imaging and diagnostics, and aircraft attitude reference systems.