1 / 10

LENS APPLICATIONS

LENS APPLICATIONS. 13.5 – PG. 567 to 570. TYPES OF LENS APPLICATIONS. The Camera The Movie Projector. TYPES OF LENS APPLICATIONS. The Magnifying Glass The Compound Microscope The Refracting Telescope. THE CAMERA. Produces a smaller, real image

chelsa
Télécharger la présentation

LENS APPLICATIONS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LENS APPLICATIONS 13.5 – PG. 567 to 570

  2. TYPES OF LENS APPLICATIONS • The Camera • The Movie Projector

  3. TYPES OF LENS APPLICATIONS • The Magnifying Glass • The Compound Microscope • The Refracting Telescope

  4. THE CAMERA • Produces a smaller, real image • Acts like converging lens, producing an inverted, real image as long as the object is at a distance greater then F’ (secondary principal of focus) • Takes light from large, distant objects and forms smaller, real images on film or the sensor in a digital camera • Digital cameras use a light-sensitive device made of silicon called a charge-coupled device (CCD), which replaces the film found in traditional cameras • How do Digital Cameras Work • http://www.youtube.com/watch?v=9dXlok8PMLo

  5. THE MOVIE PROJECTOR • A movie projector acts like the opposite of a camera • Projectors take a small object (film) and projects a large, inverted, real image on the screen • The image is larger than the object, meaning the film must be located between F’ and 2F’ • Film must be loaded into the projector upside down so that what you see on the movie screen is upright • Overhead projectors work in a similar way • How a Movie Projectors Works • http://www.youtube.com/watch?v=Ca_4dN8jrbg

  6. THE MAGNIFYING GLASS • The simplest optical device is the magnifying glass, also known as a simple microscope • It is a converging lens, where the object is located between F’ and the lens and does not produce a real image at the object location • Refracted rays spread apart or diverge, creating a larger, upright, virtual image on the same side of the lens as the object • The human brain extends these rays backwards and produces an enlarged, virtual image located on the same side of the lens as the object • Giant Magnifying Glass • http://www.youtube.com/watch?v=ljiTNRiLh-o

  7. THE COMPOUND MICROSCOPE • An arrangement of two converging lenses that produces two enlarged, inverted images: one real and one virtual • The real image is formed by the objective lens and appears in the body tube of the microscope, therefore you do not actually see this image • The virtual image is formed by the eyepiece lens; this larger, virtual image is the image you actually see • Explaining Microscopes • http://www.youtube.com/watch?v=ILZEOnQ_glY

  8. THE REFRACTING TELESCOPE • Same principal as compound microscope, difference being that the object is much farther away • Object in a refracting telescope is so far beyond 2F’ that incident rays passing through the objective lens are considered to be parallel • Produces two enlarged, inverted images: one real image (located in tube of telescope so it cannot be seen) and one virtual image (image you do see) • How Refracting Telescopes Work • http://www.youtube.com/watch?v=VzSjqNE2AHM

  9. IN SUMMARY • A camera uses a converging lens to produce a smaller, inverted, real image of a large object; the object is beyond 2F’, and the real image is located between F & 2F in the camera body • A movie projector uses a converging lens to produce a larger, inverted, real image of a small object; the object (film strip) lies between F’ and 2F’, and the image is located beyond 2F

  10. IN SUMMARY • A magnifying glass, or simple microscope, is a converging lens in which the object is located between the lens and F’. A larger, upright, virtual image is formed on the same side of the lens as the object • A compound microscope consists of two converging lenses and produces a larger, inverted, virtual image. The object is located close to the objective lens • A refracting telescope consists of two converging lenses and produces a larger, inverted, virtual image. The object is so far away from the objective lens that the incident rays that pass through the lens are essentially parallel

More Related