How to find the optical design patent of microscope head and camera lens efficiently?

A century ago, the resolution limit of microscope reached the classical theoretical prediction of the properties of light. However, exceeding the resolution requires a microscope to carry out the internal operation of real-time living cells. Technology used to be done by the most skilled masters in several laboratories, but now it is simplified to simple clinical routine procedures. The designer of the microscope, who listened carefully to the microscope, brought great innovation. In this paper, the design progress of microscope is summarized, and a newly developed optical system is studied, which can promote scientific and technological progress. Finite and infinite optical systems, when the biological microscope is simple, in fluorescence microscope and laser focusing technology, it is necessary to insert a thick optical element in the lens space between the objective lens and the eyepiece. The standard pipe length of 160 or 170 mm and the distance between the target installation flange and the eyepiece seat meet this requirement well. These instruments have spotlights in Interllens space. Metallurgists and geologists need polarized light, and the invention of extremely thin polarizers requires the insertion of huge prisms and other accessories in space. In 1930s, a manufacturer ran out of the room in a standard tube and was troubled by the aberration correction problem caused by prism, and tried a version of infinite optics for the first time to bypass these troubles. "Infinite" means that the design project image of the objective lens is infinite, and there is no certain limited distance. The parallel light area between the objective lens and the eyepiece provided by the infinite optical system. Using these systems, complex optical components can be inserted into parallel optical spaces to introduce optical aberrations or reduce the free working distance of the target. The system also retains the focus sleeve target (Figure 2). In the conceptual diagram of fig. 2, cfi60 optical path. Infinite optical system includes target, tube lens and eyepiece for converging light beam. Modules and components can be placed in the parallel optical path between the target and the tube mirror to establish a completely flexible system without an additional relay optical system. The position of this point in the image remains unchanged, and it is aligned between the target and the borescope in the axial and lateral directions. Of course, to form an image, we can see or record that the light from an infinite object must converge again through the tube mirror, or the second object is parallel to the light between the space and the eyepiece. Usually there are as many as three in a box, and the main optical elements can be placed in this space without degrading performance. Accessories and plug-in components can now achieve a magnification of 1X, which is very valuable for several optical technologies of the same sample. For example, when optical fluorescence and differential interference contrast (DIC) are installed, there is still room to install a third device amplifier, teaching head, dual-camera multi-port module or digital board at one end to track neurons. Many years ago, classic microscope lens designers considered the luxury of objective lens and eyepiece in aberration correction, such as spherical surface, abnormal color (vertical and horizontal), coma, astigmatism and field curvature. Transverse chromatic aberration (LCA) is also called the formation of red-green chromatic aberration in magnification. The blue image is on the same focal plane, but each color forms an image with different sizes. Traditionally, it is very difficult to correct LCA, often when the objective lens becomes larger, but it can be compensated in the eyepiece. The variety and calculation method of optical glass are not enough to correct the LCA in the target task years ago. Inserting a thick part into the bare inter-lens beam will further destroy the optical correction. Even today, not all manufacturers have achieved the complete revision of LCA. The new glass formula is made by Nikon (Melville, very low dispersion; Therefore, the purpose of all aberration correction itself.