What does spherometer mean?

Definitions for spherometer
spher·om·e·ter

Here are all the possible meanings and translations of the word spherometer.

Princeton's WordNet

  1. spherometernoun

    a measuring instrument for measuring the curvature of a surface

Wiktionary

  1. spherometernoun

    A device used to measure the curvature of a surface, such as a lens.

Webster Dictionary

  1. Spherometernoun

    an instrument for measuring the curvature of spherical surface, as of lenses for telescope, etc

  2. Etymology: [Sphere + -meter: cf. F. sphromtre.]

Freebase

  1. Spherometer

    A spherometer is an instrument for the precise measurement of the radius of a sphere. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens. The usual form consists of a fine screw moving in a nut carried on the centre of a small three-legged table or frame; the feet forming the vertices of an equilateral triangle. The lower end of the screw and those of the table legs are finely tapered and terminate in hemispheres, so that each rests on a point. If the screw has two turns of the thread to the millimetre the head is usually divided into 50 equal parts, so that differences of 0.01 millimetre may be measured without using a vernier. A lens, however, may be fitted, in order to magnify the scale divisions. A vertical scale fastened to the table indicates the number of whole turns of the screw and serves as an index for reading the divisions on the head. A contact-lever, delicate level or electric contact arrangement may be attached to the spherometer in order to indicate the moment of touching more precisely than is possible by the sense of touch. To measure the radius of a sphere—e.g. the curvature of a lens—the spherometer is levelled and read, then placed on the sphere, adjusted until the four points exert equal pressure, and read again. The difference gives the thickness of that portion of the sphere cut off by a plane passing through the three feet.

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Numerology

  1. Chaldean Numerology

    The numerical value of spherometer in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of spherometer in Pythagorean Numerology is: 7


Translations for spherometer

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    a conveyance that transports people or objects
    • A. endeavor
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