6A61.21 - Pinhole Camera - Pinhole Images

Code Number:
6A61.21
Demo Title:
Pinhole Camera - Pinhole Images
Condition:
Fair
Principle:
Pinhole Imaging
Area of Study:
Optics
Equipment:
Sliding Tube Type Pinhole Cameras, Cereal Box Type Pinhole Cameras, and Short Focal Length Lenses (Approximately 7 cm).
Procedure:

Take the outer of the sliding tubes and place tin foil over one end. Put a small pinhole in the middle of the tin foil. On the inner sliding tube place a screen of wax paper on one end. Slide the wax paper screen inside the outer tube and your pinhole camera is complete. If desired you can experiment with the effects of a small lens in front of the pinhole. NOTE: You must be looking at a very bright object in a darkened room to make this camera work effectively (contrast between light and dark must be very high).

References:
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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.