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- 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
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- P. Modern Physics
L7-12. Optical Board - Telephoto Lens
Purpose
To illustrate the location of the principal planes in a telephoto lens.
Equipment
Optical board with slit baffle and accessory lenses.
Setup Time
5 minutes.
Images
Description
Form a "telephoto lens" from the combination of one double-convex lens and two plano-concave lenses, trace rays back to locate the principal plane. Reverse the "telephoto lens" elements to locate the other principal plane. For comparison with the measurement, the foci and principal planes can be calculated using f(c)=20", f(d)=-20", and t=10". Choice of slit baffle and distance of baffle from the light source determine the number of rays and their spacing.
References
(PIRA unknown.) See Demonstration Reference File for details of the procedure and the calculation, as well as references for the theory. See also Demonstration L7-31: PRINCIPAL PLANES.
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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
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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