Description: A selection of things to illustrate Moire patterns.

The "Deluxe Moire Pattern Kit No. 70,719 Series A" from Edmund Scientific includes 8 figures:

• No. 1 Coarse grating
• No. 2 Fine grating
• No. 3 Logarithmic grating
• No. 4 Radiating lines
• No. 5 Equispaced circles
• No. 6 Circular zone plate
• No. 7 Sphere projection
• No. 8 Cylinder projection

Multi-lensed thermoplastic sheeting: 2 pieces roughly 2 inches square, see information sheet from Edmund Scientific.

2 pocket combs

Cautions:

Concepts demonstrated:

Setup Time: Short

Difficulty/Commitment: Straightforward

Visibility: use on the overhead projector

References: PIRA 3B50.40 and 6A70.50 involve Moire patterns
Stecher, Milton, "The Moire Phenomenon", AJP 32(4), 247-257, (April, 1964)
"Moire Patterns", Scientific American 1963 (not seen)
The Theory of the Moire Phenomenon by I. Amidror
Moire Patterns, The Exploratorium