Optical fiber light source with adjustable focus ratio for astronomical optical fiber focus ratio degeneration property measurement

The invention discloses a focus-ratio-adjustable optical fiber light source for astronomical optical fiber focus ratio degradation property measurement, and relates to the technical field of optical fiber light sources, the focus-ratio-adjustable optical fiber light source comprises a base, a light source, a first clamp, a hollow container, a second clamp, a controllable pressure gauge, an optical fiber, a flange plate, a straight sliding rail and an electric control system, the light source and the first clamp are respectively fixed on the straight slide rail, the second clamp is fixed above the straight slide rail, the first clamp and the second clamp can fix an optical fiber together, the hollow container is located between the first clamp and the second clamp, the hollow container is arranged on the straight slide rail, and the first clamp and the second clamp are fixed on the hollow container. The flange plate is arranged at the top of one end of the straight slide rail away from the base. After the foca