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How does an optical microscope infinity lens work?
Release date: 2019/7/21 10:29:38 Click volume: 1713
A microscope using an infinity optical system is mainly composed of an objective lens, a tube mirror, and an eyepiece. The specimen is enlarged by the objective lens and the tube mirror to form a magnified inverted real image; the real image is magnified by the eyepiece to form an enlarged virtual image.
Specimen (AB) at the objective lens (Lo) focus, through the objective lens (Lo) and the tube mirror (Le) to form an enlarged inverted real image (A'B'); near the human eye one eyepiece (Le) to the middle The image (A'B') is magnified again, forming a virtual image (A"B") at a bright distance (about 250 mm for the human eye).
The image observed by the human eye through the microscope is an enlarged virtual image A"B".
Electron microscope imaging principle:
The resolving power of an electron microscope is expressed by the minimum spacing of two adjacent points that it can resolve. In the 1970s, the resolution of a transmission electron microscope was about 0.3 nm (the resolution power of the human eye was about 0.1 mm). Now that the electron microscope has a maximum magnification of more than 3 million times, and the optical microscope has a maximum magnification of about 2,000 times, the atomic lattice of some heavy metals and crystals can be directly observed by electron microscopy.
Electron microscopy is an instrument that uses electron beam and electron lenses instead of beams and optical lenses to image the fine structure of matter at very high magnifications, according to the principles of electro-optical microscopy.
Specimen (AB) at the objective lens (Lo) focus, through the objective lens (Lo) and the tube mirror (Le) to form an enlarged inverted real image (A'B'); near the human eye one eyepiece (Le) to the middle The image (A'B') is magnified again, forming a virtual image (A"B") at a bright distance (about 250 mm for the human eye).
The image observed by the human eye through the microscope is an enlarged virtual image A"B".
Electron microscope imaging principle:
The resolving power of an electron microscope is expressed by the minimum spacing of two adjacent points that it can resolve. In the 1970s, the resolution of a transmission electron microscope was about 0.3 nm (the resolution power of the human eye was about 0.1 mm). Now that the electron microscope has a maximum magnification of more than 3 million times, and the optical microscope has a maximum magnification of about 2,000 times, the atomic lattice of some heavy metals and crystals can be directly observed by electron microscopy.
Electron microscopy is an instrument that uses electron beam and electron lenses instead of beams and optical lenses to image the fine structure of matter at very high magnifications, according to the principles of electro-optical microscopy.
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