The invention is applicable to the field of precise instrument adjustment, and provides a device for quickly aligning the
optical axis of a micro optical lens, which comprises a film image arranged above a to-be-aligned micro optical lens, a
relay lens, a camera arranged below the micro optical lens and performing photographing from bottom to top, and an adjusting mechanism for adjusting the
optical axis of the micro optical lens, wherein the
relay lens is located between the film image and the micro optical lens; optical axes of the film image, the
relay lens and the camera are overlapped; the center of the film image is provided with a feature graph, and the center of the feature graph is overlapped with the center of the film center. In a condition in which overlapping of the optical axes of the film image, the
relay lens and the camera is met, through photographing of the camera from bottom to top, the
optical axis offset of the micro optical lens can be analyzed through the film image and the feature graph image, adjustment through the adjusting mechanism is carried out, the structure of the device and the
algorithm are concise and simple, operation is easy, no expensive measurement instrument is needed, the
optical axis alignment efficiency and the accuracy are improved, and the cost is saved.