microscope Flashcards
an instrument used to see objects that are too small for the naked eye
microscope
an instrument that produces an accurately enlarged image of small objects
microscope
who developed the first microscope
hans and zacharias janssen (1590)
developed a compound microscope with convex and concave lens
Galileo Galilei (1609)
a book called micrographia officially documented a wide range of observations through the microscope
Robert Hooke (1665)
what is the book that officially documented a wide range of observations through the microscope
Micrographia
the first person to see microorganisms
Antan Van Leeuwenhoek (1674)
starts to build the first electron microscope
Ernst Ruska (1931)
reduces special abberration or the chromatic effect by showing the several weak lenses used together at certain distances gave good magnifications whithout blurring the image
Joseph Jackson Lister (1826)
Parts of the compound light microscope
mechanical parts
illuminating parts
optical parts
what are the mechanical parts
base
pillar
arm
inclination joint
body tube
draw tube
revolving nose piece
dust shield
coarse adjustmenet knob
fine adjustment knob
stage
mechanical stage
condenser adjustment knob
irish diaphragm
microscope stand
base
short supporting piece arising from the base
pillar
short curved handle used in carrying the microscope
arm
joint between the pillar and the arm used to tilt the upper arm
inclination joint
attached to the arm; bears the lenses
body tube
upper portion of the body tube which bears the eyepiece
draw tube
revolving structure at the lower end of the body tube which bears the lower lenses or abjectives
revolving nose piece
metallic structure above the nosepiece, which protects the lower lenses or objectives
dust shield
screw used to bring the specimen into focus
coarse adjustment knob
screw used for more delicate focusing
fine adjustment knob
platform with a central aperture and two clips to hold the slide studied
stage
mechanism attached to the stage for ease in moving the slide
mechanical stage
elevates and lower the condenser to regulate the intensity of light
condenser adjustment knob
lever in front of the condenser and which is moved horizontally to open/close diaphragm
iris diaphragm
located beneath the stage and has concave and plane surfaces to gather and direct light in order to illuminate the object
mirror
main function is to further magnify the image produced by the objective lenses
eyepiece or ocular lens
ranges of ocular lens
6x, 10x, 15x
objectives of eyepiece
scanner
low power objective
highpower objective
oil immersion objective
the lowest magnification powerof all objective lenses, usually 4x
scanner
gives the highest magnification usually 97xz or 100x
oil immersion objective
