Coin operated telescope fundamentals. What is the principle of a refracting telescope?

Updated on science 2024-08-07
4 answers
  1. Anonymous users2024-02-15

    Just like the arcade machine, the switch is turned on when the coin is flipped, and the timer will be turned off when it is then.

  2. Anonymous users2024-02-14

    A refracting telescope is a system that uses lenticular crop mirrors to concentrate light. The world's first astronomical telescope was a refracting telescope made by Galileo, which used a convex lens as its objective. Due to the different refractive indices of glass to different colors of light, refracting telescopes will produce serious chromatic aberration, therefore, later refracting telescopes mostly use compound lenses as objective lenses, that is, composed of more than two lenses, to eliminate chromatic aberration (such as the ED series of Meade company in the United States).

    Depending on the optical path, there are two types of refracting telescopes: the Galilean telescope and the Kepler telescope. Generally, refracting telescopes have a small relative aperture, that is, a long focal length and a large negative scale, so that the resolution is high, which is more suitable for astrometric work (such as measuring the position of stars, the angular distance of double stars, etc.).

    Advantages: easy to use and simple to manufacture.

    Ideal for observing moons, planets, binary stars, and especially for telescopes with large apertures.

    Compact and requires no additional maintenance.

    The closed barrel attenuates the damage to image quality caused by air flow while protecting the optical lens.

    Easy to carry and suitable for long-distance outdoor observation.

    Secondary imaging can be avoided and a high-contrast image quality can be formed.

    Through the achromatic design, the appearance of color aberration can be well avoided.

    Cons: More expensive than Newtonian or Casseille.

    At the same aperture, refracting telescopes are heavier, longer, and larger than Newtonian or Cassegreen telescopes.

    Due to the limitation of aperture, it is not suitable for observing deep-sky objects such as extragalactic galaxies, nebulae, etc.

    The disadvantage of the small focal point makes it difficult to photograph deep-sky objects with refracting telescopes.

    In the achromatic design, the color of the resulting image will be more or less distorted.

  3. Anonymous users2024-02-13

    Coin-operated telescopes are also known as coin-operated telescopes, and a standard coin-operated telescope should have 30x magnification to meet the high magnification requirements of consumers. Conventional coin-operated telescopes are below 20x, but the latest optical technology has increased magnification to 30x, making images clearer, brighter, and with a clear view of the moon's surface potholes.

  4. Anonymous users2024-02-12

    The diameter of the mouth fluid buried in the coin telescope is generally 80mm, and the diameter of the objective lens is 80mm, so that the light collection effect is better, and the image is clearer and brighter at night. In addition, a standard coin-operated telescope mirror should also be waterproof and anti-oxidation, and can be placed indoors and outdoors.

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