Optola offers wide range of double concave lenses.
Custom design double concave lenses are available upon request.
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Material | BK7 or UV fused silica |
Focal Length Tolerance | ±1% @589nm |
Design Wavelength | 589nm |
Centration | ≤3′ |
Diameter Tolerance | +0/-0.1mm |
Clear Aperture | >central 90% of diameter |
Center Thickness Tolerance | ±0.1mm |
Center Thickness | 2.5mm,nominal |
Surface Quality | 20/10(UVFS)/ 40/20(BK7) |
Surface Accuracy | ≤ 1.5λ power,λ/2 irregularity(UVFS) ≤ 1.5λ power,λ/4 irregularity(BK7) |
Chamfers | 0-0.8mm face width×45°±15° |
Part Number | Dimension A(mm) |
NPBC-063-λ | 6.35 |
NPBC-127-λ | 12.7 |
NPBC-150-λ | 15.0 |
NPBC-200-λ | 20.0 |
NPBC-254-λ | 25.4 |
441.6nm | 488-514.5nm | 532nm | 632.8nm | 670nm |
780nm | 830nm | 1064nm | 1300nm | 1550nm |