Cateyes, like telescopes and microscopes, are made up of mirrors and goggles. The telescope consists of two lenses, with a longer focus and a shorter focus; the microscope is also composed of two lenses, with a shorter focus and a longer focus. “cat eye” cannot consist of two cavity lenses, because the size of the door is about 4 cm and the distance of the lenses is about 3 cm, which determines that the focal length of the lenses and glasses cannot be long enough to satisfy the required effect of the “cat eye,” so what is the shape of the “cat eye”? (1) the “cat eye” consists of two cavity lenses that meet the requirements of meeting the requirements of two cavity lenses? (1) it is known by the pattern of imaging, the visual lenses (the lenses) into a reduced, up-to-date image of the orthodoxy, which is reduced by the eye lens (the lenses) and the final image of the visible distance from the eye, and the cavities of the “cat eye” are only lcm or so far, and the cavities of the cavity of the cavity of the lenses are also weak, i. E., it is not able to see a visible image, as shown in figure 1 (ab is far from the lens). Therefore, “cat's eye” is not made up of two dimples. (2) whether the “cateye” consists of a cone lens and a denture lens. A. The lens is a cavity lens and the lens is a dent lens, as can be seen from the pattern of lens imaging, and the scenery (one to two m away from the door) is reduced by the lens mirror (comfort lens) to the opposite image, which is like the mirror's fiction, which is smaller than the eye's eye. If people are far away from eyeglasses (dry lenses), the image of the scene is too little into the eyes and very small to see, as shown in figure 2. This led to the conclusion that lenses using cams and dents could not meet the requirements. But at the same time, it revealed to us that it met the requirements of not seeing indoors. B. Mirrors are diaphragms, lenses are condensed mirrors, as can be seen from the pattern of lens imaging, and scenes (one to two m away from the door) are reduced by the mirrors as a direct mirror. A. If the false image is in excess of the lens's 1-fold focal length, the false image as a mirror becomes a reverse image. The light map is shown in figure 3. This is not enough. B. If the image of the scenery is made from a mirror and within a multiple focal point of the lens, the image as a mirror becomes another image of the magnification of the face, the requirements are met, as shown in figure 4. In summary, the “cat's eye” consists of a dent lens, which is a cascading mirror, but the lens has a shorter focus, a longer focus, and the lens should have a focus equal to or greater than the distance between the lens and the lens (the length of the eye) and the lens. That's exactly what cat eyes are. Put it away
