Optical telescope
•Download as PPTX, PDF•
0 likes•862 views
in this presentation analyzing optical telescope and type of lens then lens telescope compared newton telescope in university of sulaimani. tell me for other description.
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Optical telescope
Similar to Optical telescope (20)
Recently uploaded
Recently uploaded (20)
Optical telescope
- 1. University of Sulaimani College of Education Physics Department First stage karbin kamaran Sunday jan 27,2017 Karbin.ph@gmail.com 2016-2017
- 2. Types of telescopes History Lenses Telescopes Make telescope Summary
- 3. • Radio telescopes • Millimeter telescopes • Sub-millimeter telescopes • Infrared telescope • Optical telescopes • Ultraviolet telescopes • X-ray telescopes • Gamma ray telescopes
- 4. Reflecting Refracting General types of Telescopes
- 5. Hans Lippershey • invented the refractor telescope in 1608. Galileo • the first to use a telescope in astronomy. Galileo's designs used a combination of convex and concave lenses. Kepler • improved the design to have two convex lenses, which made the image upside-down. Kepler's design is still the major design of refractors today, with a few later improvements in the lenses and the glass to make them. History
- 7. A Convex Lens Converges Light Rays f
- 8. The two telescopes are: • Astronomical • Terrestrial • Opera glass
- 9. Astronomical Telescope • The astronomical telescope is composed of an objective lens (convex) and an eyepiece lens (convex). • As demonstrated in an earlier slide the objective lens by itself produces a diminished, real, inverted image of a distant object being viewed. (Note: The final image produced by the astronomical telescope will be magnified, virtual, inverted.) • For distant objects the image (produced by the objective lens) is just outside the focal point of the objective lens.
- 10. Eyepiece Of Astronomical Telescope • The eyepiece lens is used as a simple magnifying glass to observe the image formed by the objective lens. • This image formed by the eyepiece is a virtual image of the real image produced by the objective. • The observer will see an inverted image with this type of telescope.
- 11. f The Astronomical Telescope Eyepiece (Convex Lens) (Shorter focal length) Objective (Convex Lens) (Longer focal length) ff
- 12. Inverter Lens In Terrestrial Telescope • A third lens can be introduced between the objective lens and the eyepiece lens of an astronomical telescope in such a way as to produce an upright image for the observer. • This lens effectively transforms the astronomical telescope into a terrestrial telescope.
- 13. Eyepiece (Convex Lens) (Shorter focal length) Objective (Convex Lens) (Longer focal length) Inverter (Convex Lens) (Shorter focal length) The Terrestrial Telescope
- 14. Make telescope
- 16. The Astronomical Telescope Eyepiece (Convex Lens) (Shorter focal length) Objective (Convex Lens) (Longer focal length) Telescope Summary Follows
- 17. Eyepiece (Convex Lens) (Shorter focal length) Objective (Convex Lens) (Longer focal length) Inverter (Convex Lens) (Shorter focal length) Telescope Summary Follows The Terrestrial Telescope
Editor's Notes
- peshake
- Hans Lippershey was a Dutch eyeglass maker who many historians believe was the inventor of the first telescope and is also sometimes credited with the invention of the compound microscope. Lippershey was born in Wesel, Germany and settled in the Netherlands, opening a spectacles shop in Middleburg.
- The earliest known working telescopes appeared in 1608 in the Netherlands and are credited to Hans Lippershey. Among many others who claimed to have made the discovery were Zacharias Janssen, a spectacle-maker in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo used this design the following year. In 1611, Johannes Kepler described how a telescope could be made with a convex objective lens and a convex eyepiece lens and by 1655 astronomers such as Christiaan Huygens were building powerful but unwieldy Keplerian telescopes with compound eyepieces. Hans Lippershey is the earliest person documented to have applied for a patent for the device.[1] Isaac Newton is credited with building the first "practical" reflector in 1668 with a design that incorporated a small flat diagonal mirror to reflect the light to an eyepiece mounted on the side of the telescope. Laurent Cassegrain in 1672 described the design of a reflector with a small convex secondary mirror to reflect light through a central hole in the main mirror. The achromatic lens, which greatly reduced color aberrations in objective lenses and allowed for shorter and more functional telescopes, first appeared in a 1733 telescope made by Chester Moore Hall, who did not publicize it. John Dollond learned of Hall's invention[2][3] and began producing telescopes using it in commercial quantities, starting in 1758. Important developments in reflecting telescopes were John Hadley's production of larger paraboloidal mirrors in 1721; the process of silvering glass mirrors introduced by Léon Foucault in 1857;[4] and the adoption of long-lasting aluminized coatings on reflector mirrors in 1932.[5] The Ritchey-Chretien variant of Cassegrain reflector was invented around 1910, but not widely adopted until after 1950; many modern telescopes including the Hubble Space Telescope use this design, which gives a wider field of view than a classic Cassegrain. During the period 1850–1900, reflectors suffered from problems with speculum metal mirrors, and a considerable number of "Great Refractors" were built from 60 cm to 1 metre aperture, culminating in the Yerkes Observatory refractor in 1897; however, starting from the early 1900s a series of ever-larger reflectors with glass mirrors were built, including the Mount Wilson 60-inch, the 100-inch (2.5 metre) Hooker Telescope (1917) and the 200-inch (5 metre) Hale telescope (1948); essentially all major research telescopes since 1900 have been reflectors. A number of 4-metre class (160 inch) telescopes were built on superior higher altitude sites including Hawaii and the Chilean desert in the 1975–1985 era. The development of the computer-controlled alt-azimuth mount in the 1970s and active optics in the 1980s enabled a new generation of even larger telescopes, starting with the 10-metre (400 inch) Keck telescopes in 1993/1996, and a number of 8-metre telescopes including the ESOVery Large Telescope, Gemini Observatory and Subaru Telescope. The era of radio telescopes (along with radio astronomy) was born with Karl Guthe Jansky's serendipitous discovery of an astronomical radio source in 1931. Many types of telescopes were developed in the 20th century for a wide range of wavelengths from radio to gamma-rays. The development of space observatories after 1960 allowed access to several bands impossible to observe from the ground, including X-rays and longer wavelength infrared bands.
- nice
- nice
- Font bkaen ba 26
- nice
- Nice multi click
- nice
- nice
- nice