Microscope objective lens

#The present application relates to the technical field of optical lenses, in particular to a microscope objective lens applicable in a device such as a microscope.

#In recent years, there has been a growing demand for microscope lenses. However, conventional microscope lenses often exhibit distortions within their microscopic range due to optical structural constraints. Additionally, the length of microscope lenses is inevitably affected by the presence of multiple lenses, and elongated structures may result in a shorter working distance. The magnification is also influenced by the working distance, which may be inconvenient for operators.

#With the advancement of technology and the increasing diversity of user demands, there is a growing need in scientific research for microscope lenses with improved observation quality. There is an urgent demand for microscope lenses that exhibit excellent optical characteristics, low distortion, high magnifications, and a long working distance.

#FIG. 1 is a structural diagram of a microscope objective lens according to the first embodiment of the present application.

#FIG. 2 is a schematic diagram showing the axial aberration of the microscope objective lens shown in FIG. 1.

#FIG. 3 is a schematic diagram showing the magnification chromatic aberration of the microscope objective lens shown in FIG. 1.

#The technical solutions in the embodiments of the present application will be described clearly and completely in the following. Obviously, the described embodiments are only a part of the embodiments of the present application and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative labor are within the protection scope of the present application.

#As shown in the accompanying drawings, the present application provides a microscope objective lens. FIG. 1 shows a microscope objective lens 10 according to the first embodiment of the present application, and the microscope objective lens 10 includes six lenses. Specifically, the microscope objective lens 10, includes in order from an emitting side to an objective side: an aperture ST, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an objective surface.

#It is defined that a central radius of curvature of the emitting surface of the sixth lens L6 is R11, and a central radius of curvature of the objective surface of the sixth lens L6 is R12. The following relationship expression is satisfied. −5.00≤R11/R12≤−1.50. The shape of the sixth lens L6 is specified within the above range, which facilitates a smooth transition of the exit light and contributes to the enhancement of the image quality.