2results about How to "Reduce vignetting" patented technology

The utility model discloses a filter support, including fixed frame, two active elements, two driven module and transmission part. Active element and driven module all are opposite fixed frame mobile setting, and transmission part is opposite fixed frame rotation setting. Two active elements and two driven module are along annular arrangement, and a driven module is located between two active elements. Active element and transmission part transmission connection, and driven module also with transmission part transmission connection. When active element is opposite fixed frame mobile, can drive transmission part opposite fixed frame rotation, and then promotes driven module to move to the same mobile direction with active element. The structure realizes the cooperation of active element and driven module through transmission part, improves the adjustment flexibility, can better adapt to different caliber lens, reduces the dark corner, satisfies the diversified shooting demand.

The invention provides an infinite correction microscope objective lens and a microscope. The infinite correction microscope objective lens comprises a first lens, a first lens group, a second lens group and a sixth lens which are sequentially arranged on the same optical axis from an object side to an image side. According to the scheme, the specific parameters and structures of all the lenses are set, so that the amplification factor of the objective lens of the infinite correction microscope is five times, the object space view field is 8 mm, a tube lens with the focal length of 200 mm can be used in a matched mode, the working distance is 30.12 mm, the corresponding numerical aperture is 0.12, the object space view field and the working distance of the objective lens of the infinite correction microscope can be improved, and the objective lens of the infinite correction microscope can be used in a matched mode. The overall performance of the microscope is improved; while the field of view is improved, the infinite effective clear aperture is optimized, vignetting can be reduced to a great extent, and the imaging effect is improved; the resolution ratio at a large field of view is high; and moreover, the independent design is completely realized, and the problem that the existing five-time objective lens cannot meet many use requirements in optical detection is solved.