Reasonable Biconcave Lens/ S-SLB-B-N
This lower cost product offering of Concave lenses has only minimal reduction in quality and is perfect for most applications. It can be used in an optical systems such as observation or lighting applications when the higher surface quality Concave Lens (SLB-N) is not required.
Common Specifications
| Material | BK7 |  |
|---|---|---|
| Design Wavelength | 546.1nm | |
| Refractive Index | ne＝1.519 | |
| Centration | ＜3′ | |
| Coating | Uncoated: the end of the part number ‘N’ Anti-reflection coating: the end of the part number ‘NM’, ‘NIR1’, ‘NIR2’ |
|
| 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 |
|
| Surface Quality (Scratch-Dig) | 60－40 |
| Schematic | Outline Drawing |
|---|---|
 |
 |
| Uncoated | How to specify anti-reflection coating | Diameter φD |
Focal Length f |
Edge Thickness te |
Center Thickness tc |
Back Focal Length fb |
Radius of Curvature r |
||
|---|---|---|---|---|---|---|---|---|---|
| Part Number | Visibe 400 - 700nm |
Near-infrared 633 - 1064nm |
Infrared 750 - 1550nm |
||||||
| S-SLB-10B-10N | M | IR1 | IR2 | φ10mm | －9.7mm | 4.6mm | 2mm | －10.3mm | 10.38mm |
| S-SLB-15B-15N | M | IR1 | IR2 | φ15mm | －14.7mm | 5.9mm | 2mm | －15.3mm | 51.90mm |
| S-SLB-20B-50N | M | IR1 | IR2 | φ20mm | －49.7mm | 3.9mm | 2mm | －50.3mm | 51.90mm |
| S-SLB-30B-100N | M | IR1 | IR2 | φ30mm | －99.7mm | 4.2mm | 2mm | －100.3mm | 103.80mm |
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