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Sale Price $6.48.
Original Price $8.10 Comp. value
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Keychain: Zernike polynomial Z(8,2) Keychain
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Aluminum Circle
+$2.10
+$2.10
+$10.35
+$10.35
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Keychain: Zernike polynomial Z(8,2) Keychain
In 1933, Nobel Laureate Frits Zernike published a set of orthogonal polynomials designed to span the unit disc for the purpose of describing the aberrations of a circular mirror. Today these same polynomials are used to codify the imperfections in optical systems such as telescopes. Ophthalmologists and optometrists use them in wavefront guided vision correction. This magnet features the Zernike polynomial of order 8 and angular frequency 2, a complex valued function
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4.6 out of 5 stars rating5.4K Total Reviews
5,410 Reviews
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5 out of 5 stars rating
By Ali Y.February 4, 2026 • Verified Purchase
Aluminum Circle, 2"
Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
5 out of 5 stars rating
By V.August 21, 2023 • Verified Purchase
Zazzle Reviewer Program
Beyond expectations. Choice of artwork is overwhelming, I found exactly what I needed from SJW_Graphics. Detail, colors, overall design looks great on this keyring. Could use as a pendant, purse charm, bookmark, too! Metal is sturdy without being heavy. Colors beautiful, with clear margins. Customized name makes this gift extra special. So many fonts, so many colors & sizes!
Original product
5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!
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Product ID: 146983312322551358
Created on: 6/14/2009, 11:46 AM
Rating: G
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