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Skip Navigation LinksHome > Lenses > Achromats > 25.4 mm dia x 63.5 mm FL, BBAR
25.4 mm dia x 63.5 mm FL, BBAR
Sku: 01AC254-064-BB
$73.00
Specifications of 25.4 mm dia x 63.5 mm FL, BBAR
Diameter (mm) : 25.40 mm
Focal Length (mm) : 63.50 mm
R1 : 43.858 mm
R2=R3 : -26.617 mm
R4 : -266.977 mm
Tc1 : 6.50 mm
Tc2 : 2.00 mm
Tc : 8.50 mm
Te : 6.30 mm
Glass : N-BaF10 & N-SF10
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Achromatic Lenses Specifications
   
Focal Length Tolerance ±2 %
Material Optical crown and flint glasses or equivalent
Design Wavelengths 486.1, 546.1, and 656.3 nm
Surface Accuracy 1.5 ? (1.5 ?) power, (?/4) irregularity at 632.8 nm over the clear aperture
Clear Aperture ?central 90% of diameter
Surface Quality 40-20 scratch-dig
Centration ?3 arc min
Diameter Tolerance +0/-0.1 mm
Center Thickness (Tc = Tc1 + Tc2) Tolerance ±0.2 mm for lenses <50.8 mm diameter
±0.4 mm for lenses ?50.8 mm diameter
Edge Thickness (Te) Tolerance Nominal Value
AR Coating SLAR (Single-layer MgF2): Ravg <1.5%, Rmax <2.5% per surface, 400–700 nm;
BBAR: Ravg <0.5%, Rmax <1.5% per surface, 430–700 nm
Operating Temperature  -40 °C to 85 °C

Achromatic
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