Lens System

• Objective Lenses: universally color coded
• Objective lenses: MOST IMPORTANT optical components of the microscope because they produce the primary image magnification.
• Objective lenses produces what?

  primary image magnification
• Objective lenses: ENLARGE and PROJECT the illuminated image of the object toward the eyepiece.
• What are the 4 types of objective lenses?

  Scanner, LPO, HPO, and Oil Immersion
• What is the magnification of Scanner?

  4x
• What is the magnification of LPO?

  10x
• What is the magnification of HPO?

  40x
• What is the magnification of Oil Immersion?

  100x
• What is the TOTAL magnification of Scanner?

  40x
• What is the TOTAL magnification of LPO?

  100x
• What is the TOTAL magnification of HPO?

  400x
• What is the TOTAL magnification of Oil Immersion?

  1000x
• Red: color of scanner
• Yellow: color of LPO
• Blue: color of HPO
• White: color of Oil Immersion
• What is the commonly used oil for oil immersion?

  Cedar wood oil
• What is the magnifying power of Oculars or Eyepieces?

  10x
• Monocular: only one eyepiece
• Binocular: two eyepieces
• Diopter Adjustment Knob: Knob on the oculars can be rotated to compensate for variation in vision between the operator's eyes.
• Coarse Adjustment knob: Used to move the stage UP or DOWN very rapidly
• Fine Adjustment knob: It is used to move the stage UP or DOWN very SLOWLY. The stage covers a very small distance on each rotation to SHARPEN the image.