BI-BCC-20-20-U, 20mm Bi-Concave lens, Uncoated, FL=-20mm
Same family
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BI-BCC-12-24-U, 12mm Bi-Concave lens, Uncoated, FL=-24mm
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BI-BCC-12-24-V, 12mm Bi-Concave lens, VIS Coated, FL=-24mm
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BI-BCC-20-20-N1, 20mm Bi-Concave lens, N1 Coated, FL=-20mm
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BI-BCC-20-20-N2, 20mm Bi-Concave lens, N2 Coated, FL=-20mm
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BI-BCC-20-20-V, 20mm Bi-Concave lens, VIS Coated, FL=-20mm
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BI-BCC-25-100-N1, 25mm Bi-Concave lens, N1 Coated, FL=-100mm
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BI-BCC-25-100-N2, 25mm Bi-Concave lens, N2 Coated, FL=-100mm
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BI-BCC-25-100-U, 25mm Bi-Concave lens, Uncoated, FL=-100mm
BI-BCC-20-20-U: 20mm Bi-Concave lens, Uncoated, FL=-20mm.
Bi-concave lenses have two inward-curved surfaces and a negative focal length. They diverge light, and are used to expand beams and to shorten the focal length needed in a system.
Size: 20 mm
Type: Bi-Concave
Material: N-SF11
Center Thickness: 2.00 ± 0.10 mm
Edge Thickness: 5.03 mm
Focal Length (EFL): -20 mm
Back Focal Length (BFL): -20.55 mm
Surface Quality: 40-20 (scratch-dig)
Flatness / Irregularity: λ/4 P-V @ 632.8 nm
Coating: Uncoated (transmission 400–2500 nm)
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Same family
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BI-BCC-12-24-U, 12mm Bi-Concave lens, Uncoated, FL=-24mm
-
BI-BCC-12-24-V, 12mm Bi-Concave lens, VIS Coated, FL=-24mm
-
BI-BCC-20-20-N1, 20mm Bi-Concave lens, N1 Coated, FL=-20mm
-
BI-BCC-20-20-N2, 20mm Bi-Concave lens, N2 Coated, FL=-20mm
-
BI-BCC-20-20-V, 20mm Bi-Concave lens, VIS Coated, FL=-20mm
-
BI-BCC-25-100-N1, 25mm Bi-Concave lens, N1 Coated, FL=-100mm
-
BI-BCC-25-100-N2, 25mm Bi-Concave lens, N2 Coated, FL=-100mm
-
BI-BCC-25-100-U, 25mm Bi-Concave lens, Uncoated, FL=-100mm
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