Abstract
Telescopes normally use two lenses and/or mirrors to produce a magnified, and in the case of point sources, brighter image. There are many different designs, the basic properties of several of those more commonly encountered having been discussed in Chap. 1. In this chapter we take a closer look at the details of some of those designs.
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Notes
- 1.
A thousandth of a millimeter. It is usually symbolized as ‘μ’ so that 1,000 μm = 1 mm.
- 2.
Indeed it is clearly inappropriate to talk of the “magnification” of an image of (say) the Moon when that image has a physical size at the telescope’s focal plane of perhaps 1 cm while the Moon itself is 3,476 km in diameter.
- 3.
The signal-to-noise ratio (Chap. 10), though, will be reduced when the image is spread over several pixels compared with being concentrated onto one.
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Kitchin, C.R. (2013). Telescope Optics. In: Telescopes and Techniques. Undergraduate Lecture Notes in Physics. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4891-4_2
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DOI: https://doi.org/10.1007/978-1-4614-4891-4_2
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