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 |
|---|---|---|---|
| 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’ |
