Word Meanings - EYEPIECE - Book Publishers vocabulary database

The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Collimating eyepiece. See under Collimate. -- Negative, or Huyghenian, eyepiece,

Additional info about word: EYEPIECE

The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Collimating eyepiece. See under Collimate. -- Negative, or Huyghenian, eyepiece, an eyepiece consisting of two plano-convex lenses with their curved surfaces turned toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens, who applied it to the telescope. Campani applied it to the microscope, whence it is sometimes called Campani's eyepiece. -- Positive eyepiece, an eyepiece consisting of two plano-convex lenses placed with their curved surfaces toward each other, and separated by a distance somewhat less than the focal distance of the one nearest eye, the image of the object viewed being beyond both lenses; -- called also, from the name of the inventor, Ramsden's eyepiece. -- terrestrial, or Erecting eyepiece, an eyepiece used in telescopes for viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position.

Related words: (words related to EYEPIECE)

• UNDERDOER
  One who underdoes; a shirk.
• UNDERBRED
  Not thoroughly bred; ill-bred; as, an underbred fellow. Goldsmith.
• FORMALITY
  The dress prescribed for any body of men, academical, municipal, or sacerdotal. The doctors attending her in their formalities as far as Shotover. Fuller. 6. That which is formal; the formal part. It unties the inward knot of marriage, . . . while
• UNDERSECRETARY
  A secretary who is subordinate to the chief secretary; an assistant secretary; as, an undersecretary of the Treasury.
• UNDERPLOT
  1. A series of events in a play, proceeding collaterally with the main story, and subservient to it. Dryden. 2. A clandestine scheme; a trick. Addison.
• UNDERNICENESS
  A want of niceness; indelicacy; impropriety.
• UNDERDOLVEN
  p. p. of Underdelve.
• UNDERSOIL
  The soil beneath the surface; understratum; subsoil.
• UNDERPROP
  To prop from beneath; to put a prop under; to support; to uphold. Underprop the head that bears the crown. Fenton.
• UNDERNIME
  1. To receive; to perceive. He the savor undernom Which that the roses and the lilies cast. Chaucer. 2. To reprove; to reprehend. Piers Plowman.
• UNDERCREST
  To support as a crest; to bear. Shak.
• OBJECTIVENESS
  Objectivity. Is there such a motion or objectiveness of external bodies, which produceth light Sir M. Hale
• UNDERSAY
  To say by way of derogation or contradiction. Spenser.
• UNDERGROUND INSURANCE
  Wildcat insurance.
• THROUGHOUT
  In every part; as, the cloth was of a piece throughout.
• UNDERTAPSTER
  Assistant to a tapster.
• UNDERDELVE
  To delve under.
• UNDERSTOOD
  imp. & p. p. of Understand.
• INSTRUMENTAL
  Pertaining to, made by, or prepared for, an instrument, esp. a musical instrument; as, instrumental music, distinguished from vocal music. "He defended the use of instrumental music in public worship." Macaulay. Sweet voices mix'd with instrumental
• UNDERDO
  To do less than is requisite or proper; -- opposed to overdo. Grew.
• FALCIFORM
  Having the shape of a scithe or sickle; resembling a reaping hook; as, the falciform ligatment of the liver.
• INFORMITY
  Want of regular form; shapelessness.
• OMNIFORMITY
  The condition or quality of having every form. Dr. H. More.
• DEFORMER
  One who deforms.
• NOTOTHERIUM
  An extinct genus of gigantic herbivorous marsupials, found in the Pliocene formation of Australia.
• DIVERSIFORM
  Of a different form; of varied forms.
• PREFORM
  To form beforehand, or for special ends. "Their natures and preformed faculties. " Shak.
• VARIFORM
  Having different shapes or forms.
• SELF-VIEW
  A view if one's self; specifically, carefulness or regard for one's own interests
• RESINIFORM
  Having the form of resin.
• BIFORM
  Having two forms, bodies, or shapes. Croxall.
• VILLIFORM
  Having the form or appearance of villi; like close-set fibers, either hard or soft; as, the teeth of perch are villiform.