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| For images of size: the eyepieces |
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Eyepieces (or oculars, from the Latin “oculus” = the eye) are the magnifiers with which you view the intermediate image in the microscope, produced by the objective and the tube lens. In the Axiolab microscope, the intermediate image has a useful diameter of 20 mm. Eyepieces are not just simple lenses, but are corrected optical systems consisting of several lenses. It would be a pity if the intermediate image produced with such sophisticated optics were to be impaired just before it reaches the eye.
Normally, the additional magnification provided by the eyepiece is 10x. The intermediate image then has a diameter of 20 cm at a reading distance of 25 cm to the eye. A comparison: this diameter is about as large as the width of this page.
| The schematic section through an eyepiece reveals the following: |
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| 1 | position of the intermediate image – also position of a reticle |
| 2 | limit of the field of view: the “black edge” of the microscope image is produced here |
| 3 | eyepiece optics |
| 4 | position of the eyepiece pupil = pupil of the observer's eye |
| 5 | focusing ring for the diopter compensation |
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