Bi-convex lens, standard grade

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Bi-convex lenses are manufactured with an identical convex surface on both sides of the lens.

  • Bi-convex lenses have positive focal lengths and form both real and virtual images.
  • Aberrations such as coma, distortion, and chromatic aberration almost exactly cancel out at unit conjugate ratios due to the symmetry. Aberrations will increase as conjugate ratios depart from unity.
  • Recommended for virtual imaging of real objects, and for positive conjugate ratios from approximately 0.2 to 5. Values are wavelength sensitive.
  • Antireflection coatings can be ordered as an option.
  • We also provide precision grade bi-convex lens with tighter manufacturing tolerances.

General Specifications:

Parameter Value
Default unit mm
Material BK7
Diameter tolerance +0, -0.1mm (+0, -0.15mm for diameter>75mm)
Clear aperture 90%
Focal length tolerance +/-2% (+/-5% for 400 series)
Center thickness tolerance +/-0.2mm
Centration 3 arc min
Surface quality 60-40

PN Description EFL Diameter BFL Tc Te Radius UnitPrice OrderOnline
DXS401 Bi-convex lens standard grade BK7 D= 5.0 EFL= 4.5 4.5 5 3.78 2 0.40 4.297 $10.5 Order
DXS005 Bi-convex lens standard grade BK7 D= 5.0 EFL= 10.0 10 5 9.10 2.6 1.96 9.910 $10.5 Order
DXS001 Bi-convex lens standard grade BK7 D= 5.0 EFL= 7 7 5 5.93 3 2.03 6.707 $10.5 Order
DXS003 Bi-convex lens standard grade BK7 D= 6.0 EFL= 8.0 8 6 6.87 3.2 1.99 7.711 $10.5 Order
DXS013 Bi-convex lens standard grade BK7 D= 6.3 EFL= 12.7 12.7 6.3 11.74 2.8 2.00 12.679 $10.5 Order
DXS017 Bi-convex lens standard grade BK7 D= 7.5 EFL= 15.0 15 7.5 14.01 2.9 1.95 15.049 $10.5 Order
DXS007 Bi-convex lens standard grade BK7 D= 7.5 EFL= 10.0 10 7.5 8.77 3.5 2.00 9.738 $10.5 Order
DXS065 Bi-convex lens standard grade BK7 D= 10.0 EFL= 33.0 33 10 32.10 2.7 1.96 33.768 $11.5 Order
DXS009 Bi-convex lens standard grade BK7 D= 10.0 EFL= 10.0 10 10 8.27 4.8 1.95 9.477 $11.5 Order
DXS019 Bi-convex lens, standard grade BK7 D=14.5, EFL=15 15 14.5 12.90 5.9 2.00 14.479 $11.5 Order
DXS015-065 Bi-convex lens, standard grade BK7 D=15, EFL=65 65 15 64.34 2 1.16 67.090 $11.5 Order
DXS015-025 Bi-convex lens, standard grade BK7 D=15, EFL=25 25 15 23.65 4 1.72 25.234 $11.5 Order
DXS015-020 Bi-convex lens, standard grade BK7 D=15, EFL=20 20 15 18.64 4 1.09 20.042 $11.5 Order
DXS025 Bi-convex lens, standard grade BK7 D=15, EFL=20 20 15 18.30 4.9 2.00 19.875 $11.5 Order
DXS067 Bi-convex lens, standard grade BK7 D=19.5, EFL=35 35 19.5 33.40 4.7 2.00 35.489 $12.5 Order
DXS059 Bi-convex lens, standard grade BK7 D=20, EFL=31 31 20 29.20 5.3 2.00 31.229 $12.5 Order
DXS020-035 Bi-convex lens, standard grade BK7 D=20, EFL=35 35 20 33.66 4 1.13 35.614 $12.5 Order
DXS020-045 Bi-convex lens, standard grade BK7 D=20, EFL=45 45 20 43.66 4 1.80 45.991 $12.5 Order
DXS029 Bi-convex lens standard grade BK7 D= 20.0 EFL= 22.0 22 20 19.60 6.9 1.99 21.577 $12.5 Order
DXS027 Bi-convex lens standard grade BK7 D= 21.0 EFL= 20.0 20 21 17.09 8.2 1.96 19.239 $12.5 Order
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