Search the Dictionary

n enlarged image of an object which is too minute to be viewed by the naked eye. Compound microscope, an instrument consisting of a combination of lenses such that the image formed by the lens or set of lenses nearest the object (called the objective) is magnified by another lens called the ocular or eyepiece. -- Oxyh…

compound lens undecomposed. -- Achromatic prism. See Prism. -- Achromatic telescope, or microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color.

osition, as the parts of an instrument; to regulate for use; as, to adjust a telescope or microscope.

The operation of bringing all the parts of an instrument, as a microscope or telescope, into their proper relative position for use; the condition of being thus adjusted; as, to get a good adjustment; to be in or out of adjustment.

r larger, more extended, or more intense, and the like; -- used especially of telescopes, microscopes, etc.

oci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed.

passing through its center and perpendicular to its surfaces. -- Axis of a telescope or microscope, the straight line with which coincide the axes of the several lenses which compose it. -- Axes of coördinates in a plane, to straight lines intersecting each other, to which points are referred for the purpose of dete…

Adapted to the use of both eyes; as, a binocular microscope or telescope. Brewster.

er or canvas, so that the outlines may conveniently traced. It is generally used with the microscope.

a leaf having two or more separate blades or leaflets on a common leafstalk. -- Compound microscope. See Microscope. -- Compound motion. See Motion. -- Compound number (Math.), one constructed according to a varying scale of denomination; as, 3 cwt., 1 qr., 5 lb.; -- called also denominate number. -- Compound pier…

aratus for confining or flattening between glass plates an object to be examined with the microscope; -- called also compressorium.

for delicate astronomical observations; spider lines. Fixed cross wires are also used in microscopes, etc.

se state of aggregation is so fine that no distinct particles are visible, even under the microscope.

found out, or perceived; as, many minute animals are discoverable only by the help of the microscope; truths discoverable by human industry.

Used for or in dissecting; as, a dissecting knife; a dissecting microscope.

An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct. W. H. Wollaston.

A kind of reflecting microscope. [Obs.]

An attachment to a microscope, telescope, or other optical instrument, for making the image erect instead of inverted.

Eyepiece of a telescope, microscope, etc.

s. 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…