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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Accurate sags equation |
S=y2xfx(2000(n-1) |
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Exact sags equation |
S=r-✅r2-y2 |
Square root |
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Lens measure equation |
Sx2000(n-1)/y2 |
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Symbol “S” |
Saga |
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Symbol “y” |
1/2 Diam |
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Symbol “F” |
Power |
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Symbol “e” |
Edge thickness |
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Symbol “t” |
Centre thickness |
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Formula- Radius Front |
R1=n’-1/F1 |
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Formula- radius back |
R2=1-n’/F2 |
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Formula- edge thickness |
e=t+s |
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Formula- Centre thickness |
t= e+s |
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