BK7 Bi-Convex Lenses

 

These symmetrical lenses also possess positive focal lengths and produce real images of distinct objects. However theses lenses minimize the spherical aberrations for nearly symmetrical positions of the conjugate points with respect to the lens. For exactly symmetrical imaging with a 1:1 magnification not only the spherical aberration is minimized, but also coma and distortion are completely eliminated. As a rule of thumb the bi-convex lenses are best used for magnifications between 1/5 and 5.

 

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Material:    BK7
Focal Length:    +/- 2 %
Design Wavelength:    546,1 nm
Diameter Tolerance:    +0/- 0.2 mm
Centering:    < 5 min. of arc
Wavefront Distortion:    λ/10
Clear Aperture:    90 % of diameter
Surface Quality:    S/D 10-5
Antireflection Coating:    on request
Lens mounted in cell:    on request

 

Other dimensions and focal lengths on request: list of radii  

Part-No. Diameter    Focal Length  Price €
LBX0.5"B/15 0.5" 15 mm 40 ,--
LBX0.5"B/25 0.5" 25 mm 39 ,--
LBX0.5"B/40 0.5" 40 mm 32 ,--
LBX0.5"B/50 0.5" 50 mm 29 ,--
LBX0.5"B/75 0.5" 75 mm 29 ,--
LBX0.5"B/100 0.5" 100 mm 27 ,--
LBX0.5"B/150 0.5" 150 mm 27 ,--
LBX0.5"B/200 0.5" 200 mm 27 ,--
LBX0.5"B/300 0.5" 300 mm 27 ,--
LBX1"B/25 1" 25 mm 35 ,--
LBX1"B/40 1" 40 mm 34 ,--
LBX1"B/50 1" 50 mm 33 ,--
LBX1"B/75 1" 75 mm 31 ,--
LBX1"B/100 1" 100 mm 31 ,--
LBX1"B/150 1" 150 mm 31 ,--
LBX1"B/200 1" 200 mm 31 ,--
LBX1"B/300 1" 300 mm 31 ,--
LBX1"B/500 1" 500 mm 31 ,--
LBX1"B/1000 1" 1000 mm 31 ,--
LBX2"B/75 2" 75 mm 92 ,--
LBX2"B/100 2" 100 mm 83 ,--
LBX2"B/150 2" 150 mm 77 ,--
LBX2"B/200 2" 200 mm 74 ,--
LBX2"B/300 2" 300 mm 70 ,--
LBX2"B/500 2" 500 mm 70 ,--
LBX2"B/1000 2" 1000 mm 70 ,--
LBX2"B/2000 2" 2000 mm 70 ,--
LBX2"B/3000 2" 3000 mm 70 ,--