APPLICATION

OF LENSES

ZUHHA TAQDEESROLL NO: 2512SUBMITTED TO: MISS HINA

CONTENTS

• Lens

• Types of lenses

• Classification

• Applications

LENS

It is an optical device that transmits and reflects light, converge or diverge beam.

NIMRUD LENSE

• 3000 years old• Austen Henry Layard• Assyrian Palace of Nimrud• Magnifying Glass• Burning Glass• Piece of decoration

SIMPLE AND COMPOUND LENS

•Simple lens consists of simple single element

•Compound lens consists of more than one elements

ASPHERIC LENS

A lens whose surface profiles are not a portion of a sphere or cylinder.

DOUBLET• Made by pairing of two simple lenses

• Allows: More Optical surfaces More Thickness

CLASSIFICATION

• Classified on the basis of bending rays• Converging lens ( convex lens )• Diverging Lens ( Concave lens )

APPLICATIONS

• Magnifying glass• Spectacles• Cameras• Compound microscope• Telescope• Binoculars

MAGNIFYING GLASS

SPECTACLES

• Structure of eye

• Imperfect vision

• Near sightedness

• Far sightedness

Near Sightedness

Far Sightedness

CAMERAS

• Functions like eye• Aperture; pupil• Lenses• Film; retina

COMPOUND MICROSCOPES

• Pair of convex lens

• Objective lens

• Eye piece

TELESCOPE

BINOCULARS

• Consists of two small telescopes

• Prisms

• Increase magnification

MEDICAL APPLICATIONS

Autoscope Opthalmoscope

OTHER APPLICATIONS

CONCLUSION