测望远镜放大率（Telescope magnification）.doc

测望远镜放大率（Telescope magnification） The | | picture resources | video courseware resources | simulation experiment | demonstration experiment | physical world | download resources Current position: Home Page courseware resource basic physics experiment (large and general material experiment) basic experiment Article content Microscopes and telescopes Source: Author: release time: 2009-03-20 The telescope and microscope are used widely in visual instrument, microscope is mainly used to help people to observe the tiny objects nearby, but the telescope is mainly to help people observe distant targets, they are often combined in other optical instruments. There are many types of telescopes and microscopes for different purposes and performance. The structures are different, but their basic optical systems are made up of an object lens and an eyepiece. Telescopes and microscopes play an important role in the fields of astronomy, electronics, biology and medicine. [experimental purposes] 1. learn to use the image magnification method of measuring lens focal length. 2. familiar with the structure and magnifying principle of telescope and microscope. 3. master the coaxial adjustment method of optical system. 4. learn telescope and microscope magnification measurement. [experimental principle] 1. image magnification method of measuring lens focal length Method of measuring lens focal length although there are many, but in some cases, because the lens optical center position to be accurate Measurement, and even the screen, like the location of the screen is also difficult to determine the accuracy, so it will bring some difficulties to the measurement. Use the image magnification method measurement The focal length of a mirror or lens set can overcome this difficulty completely. Figure 1 As shown in Figure 1, the micro scale differentiation as the plate is arranged on a guide rail, the measured lens is arranged on a guide rail, the spacing is greater than the measured focal