Liquid chromatography ultraviolet diode array detector

The invention discloses a liquid chromatogram ultraviolet diode array detector, which belongs to the technical field of liquid chromatogram analysis, a deuterium lamp is used for emitting ultraviolet visible light, the deuterium lamp is arranged at the focus of a first off-axis parabolic mirror, the first off-axis parabolic mirror is used for collimating the ultraviolet visible light, a sample cell is arranged on the light path of the collimated light, and the sample cell is used for detecting the ultraviolet visible light. The two sides of a light inlet hole and a light outlet hole of the sample pool are each provided with an optical slit, the optical fiber coupler is connected with an optical fiber, collimated light sequentially penetrates through the optical slits, the sample pool and the optical slits and enters the optical fiber through the optical fiber coupler, and emergent light of the optical fiber is reflected to the second off-axis parabolic mirror through the slits. The second off-axis parabolic m