Parts of a Microscope Flashcards
The V-shaped or u-shaped structure that supports the whole instrument
Base
The vertical extension of the base to which the arm is attached
Pillar
Thethe curved basic part of the microscope to which
the base, body and stage are attached. It serves as the
handle of the microscope and provides support for the
optical parts.
Arm
movable parts which facilitate tilting of the
microscope.
Inclination joint
a platform upon which the slide containing the specimen is
placed. It is provided with a central aperture that allows light to
pass from below to the object of the study.
Stage
a pair of metals that holds the slide in place. Some
microscopes are provided with a mechanical stage which moves
the specimen forward, backward or sideward by means of
mechanical screw.
stage clips
a hollow cylinder in front of the upper part of the arm
that serves as housing for the lenses. It serves as a passageway of light from the objective to the eyepiece.
Body tube
the smaller cylinder attached to the top of the body
tube and holds the ocular or eyepiece..
Draw tube
a fixed plate attached to the base of the body tube
and situated above the revolving nosepiece. It protects the
objectives from dust and dirt.
Dust shield
a rotary head attached to the base of the body
tube and holds the objectives. It also facilitates the shifting of the objectives.
Revolving nosepiece
Used to adjust the objectives when focusing which
when turned clockwise and counter clockwise; lowers or raises the body tube.
Adjustment Knobs
these are the upper, larger knobs
used for faster movement of the body tube when focusing the low power objective.
Coarse Adjustment Knobs or Screws
these are the lower, smaller knobs used for final
focusing under high power objective and viewing at different levels.
Fine Adjustment Knob
usually two faced where one surface is plain or flat and concave on the other side. It is used to reflect light through the object, lenses and into the eyes. The plain surface is used when the source of light is very bright while the concave mirror is used with the low intensity if light of natural or artificial source. Its frame is held by the mirror rack or fork.
Mirror
an optical part under the stage to which is
either fixed or provided with adjustment for lowering or raising until the field is evenly illuminated. It is used to illuminate,
condense or concentrate the reflected light from the mirror to the object being examined.
Abbe condenser
a plate that is supported with numerous
apertures of varying sizes to regulate the amount of light that
enters the condenser.
Iris diaphragm
the detachable tube situated on the top of
the draw tube equipped with one set of lenses that magnifies the object several times. It may be provided with a dark pointer which is used to point a specific part of the specimen being focused.
Eyepiece or Ocular
The lens nearest to the object being examined whereas
the lens closest to the eye is termed the ocular (the eyepiece).
Objectives
if there are four objectives present, this the shortest
cylinder with the widest lens opening but with the lowest
magnification. It is used to observe wider field of object.
Scanner
the shortest tube with large lens opening which has a magnification of 10X. It is used to observe the general outline of the object under study and to locate various parts of the specimen.
Low Power Objective (LPO)
the longer tube with smaller lens
opening which has a magnification of 40X. It is used in observing
the details of the specimen being studied.
High Power Objective (HPO)
the longest tube with a very small lens opening and has a magnification varying from 90-100X. A drop of cedar wood oil is placed on the specimen and the objective must be lowered very close to the slide until the front touches the oil. This prevents the refraction or dispersing of light
Oil Immersion Objective (OIO)
