Products/Services for Refractor Objective Lens

  • Microscope Lenses and Objectives-Image
    Microscope Lenses and Objectives - (63 companies)
    ...cost, and index of refraction. Condenser lenses are higher-power objective lenses that increase illumination and resolution. These microscope lenses and objectives have very small diameters and are mounted at or below the focusing or condenser stage... 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 - (281 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 - (20 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 - (34 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 - (218 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...
  • PISCO2: the new speckle camera of the Nice 76-cm refractor
    The on-sky pixel scale of the whole instrument (telescope and PISCO2) can be calibrated in an absolute manner with a grating mask placed in front of the refractor objective lens .
  • 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.
  • Comparative analysis of the lidar receiving objectives
    Lens objectives ( refractors ) A lens with the spherical faces is the most simple objective for the single wave lidar.
  • 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.