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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.
- Bi-convex elements have a Minimum Order Quantity (MOQ) ranging from 100
to 1,000 units.
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: |
DXS059
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| Description: |
Bi-convex lens, standard grade BK7 D=20, EFL=31
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| Material: |
BK7
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| EFL: |
31
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| Diameter: |
20
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| Index: |
1.51872
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| BFL: |
29.20
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| Tc: |
5.3
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| Te: |
2.00
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| Radius1: |
31.229
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| Radius2: |
-31.229
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| Volume Price: |
Request Volume Quote |
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