Luneta Keplera

The run of rays in Kepler's lattice P1 - Subject P2 - The image given by the lens P3 - The image given by the eyepiece F1 - Focus of the lens F2 - Focus of the eyepiece

Kepler's telescope - astronomical telescope, first described by Johannes Kepler. It consists of a lens and a eyepiece (both with positive gathering ability) so that the lens focal point coincides with the focus of the eyepiece. The aperture aperture is a lens mount. Her image of the telescope is her starting pupil; The eye should be positioned. Depending on the illumination, the diameter of the pupil of the eye may vary from 2 mm to 8 mm and this in fact determines the aperture of the telescope, and thus its brightness. Building a telescope with too much aperture diaphragm does not make sense, as a part of the light beam passing through the telescope will be stopped by the pupil's eye and will not participate in the imaging. designs

The telescope's visual magnification specifies the pattern: & # x0393; = tg ⁡ ( w & # x2032; ) tg ⁡ ( w ) = f 1 & # x2032; f 2 & # x2032; {\displaystyle \Gamma ={\operatorname {tg} (w') \over \operatorname {tg} (w)}={f'_{1} \over f'_{2}}}

which is equal to the ratio of the diaphragm aperture and the pupil diameter. Picture in the stream

The Kepler image is reversed and if the binoculars are to be used as binoculars, it must be equipped with a radial rotation system (eg Porro prisms). Bibliography

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