Biconvex
Symmetrical biconvex lenses are most useful when dealing with finite conjugate points. This makes them ideal for 1:1 imaging applications or for use in multi-element systems.
There are two types of biconvex lenses available; BK7 for use in visible range to infrared wavelength range.BK7 lenses are also available with three types of anti-reflection coatings, visible wavelength range, in the near-infrared range and in the infrared range.
Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.
Common Specifications
Material | SLB:BK7 SLSQ: Synthetic fused silica | |
---|---|---|
Design wavelength | 546.1nm | |
Refractive Index | BK7: ne=1.519 Synthetic fused silica:ne=1.460 |
|
Coating | Uncoated: the end of the part number ‘P’ Anti-reflection coating: the end of the part number ‘PM’, ‘PIR1’, ‘PIR2’ |
|
Laser Damage Threshold | Anti-reflection coating: 4J/cm2 Laser pulse with 10ns, repetition frequency 20Hz |
|
Clear aperture | 90% of actual aperture: Uncoated 85% of actual aperture: with coating, φ10≦D 83% of actual aperture: with coating, D<φ10 |
|
Surface Quality (Scratch-Dig) | 20-10 φ10≦φD 40−20 φD<φ10 |
Schematic | Outline Drawing |
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Part Number | Material | Diameter | Coating |
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SLB-B-P | BK7 | φ5~φ100mm | Uncoated: the end of the part number ‘P’ Anti-reflection coating: the end of the part number ‘PM’, ‘PIR1’, ‘PIR2’ |
SLSQ-B-P | Synthetic fused silica | φ5~φ50.8mm | Uncoated: the end of the part number ‘P’ |