2results about How to "Adjust sharpness" patented technology

The utility model discloses a zoom projection lens which comprises a first lens assembly, a second lens assembly, a third lens assembly, a diaphragm, a fourth lens assembly and a fifth lens assembly which are sequentially arranged along a direction from an object space to an image space. A full-group linkage zoom design is adopted, and the first lens assembly is set as a zoom group for changing the focal length of the projection lens; the second lens assembly, the third lens assembly, the fourth lens assembly and the fifth lens assembly are arranged to be a compensation group used for offsetting the image surface position change caused by the movement of the zoom group. When zooming is carried out from the telephoto end to the wide-angle end, the distance between the second lens assembly and the third lens assembly is gradually increased. According to the utility model, the space occupied by the lens is reduced, so that the lens can adapt to the working condition of a compact installation space, the lens can maintain excellent imaging performance at different focal lengths within the working temperature range of a special application scene, and the flexible adaptability of the zoom projection lens is improved. The utility model also provides a projection system.

The utility model relates to a pull ring detection technical field, concretely relates to a pull ring detection device. The pull ring detection device, include: conveying assembly, conveying assembly is used for conveying jar body, detection assembly, detection assembly sets up on conveying assembly, detection assembly includes image acquisition structure, image acquisition structure has the end with pull ring to jar body orientation, to make image acquisition structure obtain jar body pull ring's image, control system, control system has controller and man -machine interface, controller is connected with image acquisition structure, man -machine interface and conveying assembly signal respectively. Through setting up image acquisition structure and control system, the image that controller can gather through image acquisition structure judges whether the pull ring of jar body that passes through image acquisition structure on conveying assembly has the defect, detects through the controller, effectively has improved the detection efficiency, has reduced the labor intensity.