OPTICAL MEASUREMENT

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• Q1: What are Measuring Microscopes?
  Ans: Measuring microscopes are optical instruments used to measure small dimensions of objects with high accuracy using magnification.
• Q2: State the uses of Measuring Microscopes.
  Ans: Uses of measuring microscopes are:

  • ➔ Measuring small components
  • ➔ निरीक्षण (inspection) of fine details
  • ➔ Measuring angles and distances
  • ➔ Tool and part inspection
• Q3: State the classification of Measuring Microscopes.
  Ans: Classification of measuring microscopes are:

  • ➔ Filar Micrometer Microscope
  • ➔ Scale Micrometer Microscope
• Q4: What is a Filar Micrometer Microscope?
  Ans: A filar micrometer microscope is a type of microscope that uses movable cross wires (filar lines) to measure small distances accurately.
• Q5: What is a Scale Micrometer Microscope?
  Ans: A scale micrometer microscope is a microscope that uses a fixed scale inside the eyepiece to measure dimensions.
• Q6: What are Travelling Microscopes?
  Ans: Travelling microscopes are microscopes that can move along a scale to measure distances precisely.
• Q7: State some advantages of Measuring Microscopes.
  Ans: Advantages are:

  • ➔ High accuracy
  • ➔ Magnification of small objects
  • ➔ Non-contact measurement
  • ➔ Useful for fine inspection
• Q8: What is a Tool Maker’s Microscope?
  Ans: A tool maker’s microscope is a precision instrument used to measure angles, dimensions, and profiles of small tools and components.
• Q9: State some uses of Microscope.
  Ans: Uses of microscope are:

  • ➔ Inspection of small parts
  • ➔ Measuring fine dimensions
  • ➔ Checking tool profiles
  • ➔ Quality control
• Q10: What are Optical Flats?
  Ans: Optical flats are highly polished flat glass surfaces used to check the flatness of a surface using light interference.
• Q11: State some precautionary measures while working with Optical Flats.
  Ans: Precautions are:

  • ➔ Handle carefully to avoid scratches
  • ➔ Keep surfaces clean
  • ➔ Avoid dust and dirt
  • ➔ Store properly after use
• Q12: What is a Profile Projector?
  Ans: A profile projector is an optical instrument that projects a magnified image of an object onto a screen for measurement and inspection.
• Q13: State the importance of a Profile Projector.
  Ans: Importance are:

  • ➔ Accurate measurement of complex shapes
  • ➔ Easy inspection of profiles
  • ➔ Non-contact measurement
  • ➔ Improves quality control
• Q14: State the uses of a Profile Projector.
  Ans: Uses are:

  • ➔ Checking shape and profile
  • ➔ Measuring angles and dimensions
  • ➔ Inspection of small parts
  • ➔ Tool inspection
• Q15: State the two methods of projection.
  Ans: The two methods of projection are:

  • ➔ Diascopic Projection
  • ➔ Episcopic Projection
• Q16: What is Diascopic Projection?
  Ans: Diascopic projection is a method in which light passes through the object to form an image on the screen.
• Q17: What is Episcopic Projection?
  Ans: Episcopic projection is a method in which light is reflected from the surface of the object to form an image.