Mikroskop objektiv objektiv uvod
①Dry objective lens uses air as the medium, such as the commonly used objective lens below 40×, the numerical aperture is less than 1.
②Oil immersion objektiv lens obično uses cedar ulje as the medium, this objective lens is also called oil lens, its magnification is 90×~100×, and the numerical aperture value is greater 1.
Numerical aperture (numerički otvor blende, N.A.) , also known as mirror aperture ratio (or aperture ratio). Both the objective lens and the condenser are označen with their numerical aperture, which is the main parameter of the objective lens and condenser, and is also the most important index to judge the performance. The performance of an objective depends on the numerical aperture of the objective, the larger the numerical aperture, the better the the Performance of The Objective. The numerical aperture is close related to various properties of the microscope, it reflects the size of the resolution of the objective lens, the larger the value, the value, the higher the resolution.
The working distance Refers to the distance between the donje surface of the objective lens and the upper surface of the cover glass when the object image is adjusted clear; the greater the magnification of the objective lens, the smaller the work distance.
