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| Coad | 668606 | Substrate | N-BK7 | |
| Type | Plano-Convex Lenses | Clear Aperture | 90% CA | |
| Diameter(mm) | 50.80 | Diameter Tolerance | +0/-0.1mm | |
| Thickness(mm) | 3.00 | Thickness Tolerance | +0/-0.1mm | |
| Center Thickness | 12.5mm | Parallelism | ≤3 arcmin | |
| Wavelength(nm) | 350 - 2000 | Surface Quality | 40-20 | |
| Focal Length(mm) | 75.00 | Focal Length Tolerance | ±1% | |
| Radius of Curvature | 38.6mm | Back Focal Length | 66.5mm | |
| Sagittal Aperture | 0.5 | Aperture on Curved Surface | 3 | |
| Surface Irregularity | λ/2@633 nm | Laser Damage Threshold | 4.5J/cm2@355nm，17.1ns，100Hz，Ø4.41μm (100 Pulses) 0.21J/cm2@515nm，290fs，100Hz，Ø10.72μm (100 Pulses) 0.50J/cm2@1550nm，190fs，100Hz，Ø11.47μm (100 Pulses) | |
| Coating Type | Uncoated | Mechanical Housing | SM2-16.5A（Lens sleeve with SM2 internal and external threads） | |
| Coating Specifications | Uncoated | |||
A plano-convex lens has one convex surface and one flat surface, providing a positive focal length. It is typically used to reduce beam size, decrease focal length, or magnify images. To minimize spherical aberration, the plano-convex lens should be oriented so that the curved surface faces the incoming collimated beam when focusing, while the flat surface faces the point source when collimating. LBTEK manufactures a variety of lenses using N-BK7, the most commonly used optical material, widely applied in the visible and near-infrared spectral ranges.
LBTEK Plano-Convex Lenses feature positive focal lengths and are commonly used for imaging or beam collimation applications. They are manufactured from RoHS-compliant N-BK7 glass, the most widely used material for high-quality optical components, particularly suitable for the visible and near-infrared spectral ranges. All LBTEK circular lenses are pre-installed in standard lens tubes or lens adapter mounts. The surfaces of these mechanical housings are engraved with the product model, type, diameter, and focal length, allowing users to quickly and easily identify lens specifications.
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