Reflaction and Telescope Optics

Reflaction and Telescope Optics

C017/3507 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 87.7MB

Downloadable file size: 6.9MB

Price image Pricing

Please login to use the price calculator


Credit: DAVID PARKER/SCIENCE PHOTO LIBRARY

Caption: Plate from 18th century encyclopedia showing diagrams of telescope optics, and light raypaths through prisms and lenses to the eye. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is so named because it is usually the lens that is closest to the eye when someone looks through the device. The objective lens or mirror collects light and brings it to focus creating an image. The eyepiece is placed near the focal point of the objective to magnify this image. The amount of magnification depends on the focal length of the eyepiece. Two drawings illustrate lightpaths through reflecting telescopes, one showing the rays reflected by an angled flat mirror through 90 degrees to an eyepiece, the other reflected back through a hole in the primary mirror.

Release details: Model release not required. Property release not required.

Keywords: concave, convex, encyclopedia, eye, eyepiece, focal point, human eye, illustration, image, lens, lenses, light, magnification, magnify, microscope, mirror, objective, ocular, optics, primary mirror, prism, raypath, reflection, refraction, spectrum, telescope

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.