- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
L6-11. Optical Board - Depth Of Field
Purpose
To illustrate the idea of depth of field of a (camera) lens, and to locate the near and far points.
Equipment
Optical board with three convex lenses.
Setup Time
5 minutes.
Images
Description
The beams passing through lenses 1 and 2 are focussed to produce an object for lens 3, the "camera" lens,which is imaged on a distant screen at the right as a straight line. Adjust the screen position so that the image is as sharp as possible, and mark the object point on the optical board with black tape. By moving lens 2, the position of the object is changed, eventually causing the image to become blurred. Mark the near and far points on the board for an acceptably clear image line. The result as obtained here is somewhat arbitrary, but in fact there is a mathematical definition for what co
References
Alex J. Dragt, Lie Albegraic Theory of Geometrical Optics and Optical Aberrations, Journal of the Optical Society of America 72,372-379.
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
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See pagesl1. light sources & light rays
-
See pagesl2. plane mirrors
-
See pagesl3. curved mirrors
-
See pagesl4. refraction
-
See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments