![]() ![]() ![]() Usually, on the objective outer casing, there are signs of the following parameters: Objective Magnification: for example 10X, 40X Numerical Aperture (N.A.): for example, /1.30 Objective Immersion Media: Oil represents oil, W represents water, and Glyc represents glycerin Mechanical Tube Length and Objective Cover Glass Thickness: the two parameters are usually written together and separated by /. However, when ofthe same type and parameter design the same or similar, the objectives of different models and manufacturers are interchangeable, provided that attention shouldbe paid to the change in magnification, working distance, field of view and image quality. Different types of microscope objectives are generally not interchangeable. Depending on the application, objective is usually classified into the following categories: Biological Objective Metallurgical Objective Phase Contrast Objective Polarizing Objective Dark/Bright Field Objective Stereo Objective Monocular Video Microscope Objective Infinity-Corrected Long Working Distance Objective NIR Objective NUV Objective UV Objective Telecentric Objective Lens Some objectives are mounted directly on the microscope body, some separate from the body and are installed when needed. Objective Close Λ The objective (lens) is the first set of optical systems that image the object being observed, and is also the most important imaging component in the microscope. ![]()
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