Products/Services for Refractor Objective Lens

  • Microscope Lenses and Objectives-Image
    Microscope Lenses and Objectives - (63 companies)
    ...instead of video cameras. Other optical components for microscope lenses and objectives include contrast plates, cover slips, diaphragms, illuminators, mechanical stages, and mirrors. The objective lens is the microscope lens closes to the object. Search by Specification | Learn More
  • Optical Lens Assemblies-Image
    Optical Lens Assemblies - (144 companies)
    Optical Lens Assemblies Information. Optical lens assemblies are composed of a number of lenses mounted for a particular imaging function. These can include telecentric lenses, collimators, beam expanders, zoom lenses, etc. Optical lens assemblies... Search by Specification | Learn More
  • Telescopes-Image
    Telescopes - (58 companies)
    ...the objective lens in the body of the telescope. In refractor telescopes, the telescope lens is convex in shape, meaning that it is thicker in the middle than at the edges. In a reflecting telescope, light is reflected and focused by using a concave... Search by Specification | Learn More
  • Lens Holders-Image
    Lens Holders - (30 companies)
    ...specifically to hold an objectives lens, a series of gauging lenses, or collimators. Other types of lens holders include mirror mounts, prism and cube beamsplitter holders, filter holders, rotary polarizer holders, pinhole and slit holders, fiber optic holders... Search by Specification | Learn More
  • Camera Lenses and Video Lenses-Image
    Camera Lenses and Video Lenses - (282 companies)
    ...lighting conditions. In auto DC drive lenses, the iris is automatically adjusted via a dc signal output by the camera. There is no circuitry in the lens, just the motor driven by the DC signal. For auto video drivesthe iris is automatically adjusted via... Search by Specification | Learn More
  • Zoom Lenses - (19 companies)
    Zoom Lenses Information. Zoom lenses are mechanical assemblies of lens elements that provide the ability to vary focal length and angle of view. In optical systems, shorter focal lengths provide greater optical power. In telescopy and photography... Search by Specification | Learn More
  • Cylindrical Lenses - (136 companies)
    Cylindrical lens have at least one surface that is formed in the shape of a cylinder. Cylindrical lenses are used to correct astigmatism in the eye, and, in rangefinders, to produce astigmatism, stretching a point of light into a line. This area... Search by Specification | Learn More
  • Fresnel Lenses - (35 companies)
    Fresnel lenses resemble a planoconvex or planoconcave lens that is cut into narrow rings and flattened. If the steps are narrow, the surface of each step is generally made conical and not spherical. How to Select Fresnel Lenses. Image credit: Knight... Search by Specification | Learn More
  • Gradient Index Lenses - (12 companies)
    Gradient index (GRIN) lenses focus light through a precisely controlled radial variation of the lens material's index of refraction from the optical axis to the edge of the lens. How to Select Gradient Index Lenses. Image credit: Thorlabs | Grintech... Search by Specification | Learn More
  • Spherical Lenses - (219 companies)
    ...10:1). Biconcave. Negative. < 5:1. Meniscus. Either; dependent upon lens. Image credit: Freewebs | Standa | Direct Industry | Play Hookey. Specifications. Wavelength Range. Spherical lenses can be designed to operate within specific ranges... Search by Specification | Learn More
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  • The Urban Astronomer’s Guide
    An achromatic refractor, i.e., a telescope with a two-element objective made of crown and flint glass, the most pop- ular design of refractor objective lens for the last couple of centuries, cannot bring all colors of light to focus at...
  • On-sky observations with an achromatic hybrid phase knife coronagraph in the visible
    The refractor objective lens is an achromatic doublet opti- mized for the 560 nm wavelength.
  • Binocular Astronomy
    It is normally considered to consist of the tube itself,the focuser and the optical train from the objective lens ( refrac- tor ), primary mirror (reflector), or corrector plate (catadioptrics) up to, but not including, the eyepiece.
  • Reflecting Telescope Optics I
    As was so often the case in the fascinating history of the development of the telescope, the advance of the reflector to surpass the single lens objective refractor (above all because of compactness) was accompanied by a major breakthrough in the refractor.
  • The Moon and How to Observe It
    Refractors have an objective lens and an eyepiece at either end of a closed tube.
  • Mars and How to Observe It
    Refractors have an objective lens and an eyepiece at either end of a closed tube.
  • Making Beautiful Deep-Sky Images
    We have either an equatorially mounted apochromatic refractor with an objective lens diameter of 90mm or more, or we have an S.C. reflector with a mirror diameter greater than six inches, on an Equatorial mount.
  • Saturn and How to Observe It
    An achromatic refractor has an objective lens made up of two air-spaced crown and flint optical glass elements, with all air-to-glass surfaces usually coated with a thin layer of MgF2.
  • Comets and How to Observe Them
    Achromatic refractor objectives contain two lenses .
  • New Eyes on the Universe
    The limit for refracting telescopes was reached in 1897, with the construc- tion of an instrument at the Yerkes Observatory; the Yerkes refractor had an objective lens that was 1.016m in diameter.
  • The Transits of Extrasolar Planets with Moons
    adjustments and modifications that had been carried out on the refractor telescope’s objective lens .
  • Care of Astronomical Telescopes and Accessories
    Most refractor lenses , called objec- tives , are a fraction larger than this value, because the retaining lip of the cell that hold the lenses covers a few millimeters of the glass perimeter.
  • A Buyer’s and User’s Guide to Astronomical Telescopes & Binoculars
    The former involves the time- honored but equally time-consuming art of fabricating the optical components (typically the primary mirror for a reflector and the objective lenses for a refractor ).
  • Human Vision and the Night Sky
    The objective lens of the refractor or the corrector of the catadiop- tric telescope is exposed to the elements and must be properly cared for.
  • The Science and Art of Using Telescopes
    This is a mirror used to collect light in a reflector, which performs the same task as an objective lens in a refractor .