Plano-Convex Lens, N-BK7, AR Coating T4: 1050-1700 nm OLC140119-T4
A plano-convex lens has a positive focal length and can focus parallel rays to a single point or collimate light emitted by a point source. When the object and image distances from the lens are unequal and an absolute magnification below 0.2 or above 5 is required, the asymmetry of this lens shape minimizes spherical aberration. The optimal case is to place the object at infinity, so that rays enter the lens in parallel and ultimately form an image at the focal point. This plano-convex lens offered by JCOPTIX is made of N-BK7 glass. N-BK7 is the most common borosilicate crown optical glass, offering excellent optical performance at a moderate price. N-BK7 has high homogeneity, few bubbles, low impurity levels and easy manufacturability, making it an excellent lens material for visible and near-infrared applications. N-BK7 is often used instead of UV fused silica when high UV transmission and a lower coefficient of thermal expansion are not required. JCOPTIX offers plano-convex lenses with diameters from 12.7 to 50.8 mm. Uncoated versions provide a wide operating wavelength range and a high damage threshold. Antireflection-coated versions are also available for operating wavelengths of 350-700 nm, 650-1100 nm or 1050-1700 nm. The antireflection coatings effectively reduce surface reflection within the operating wavelength range, with an average reflectance below 0.5% per surface, and improve lens transmission. For other special customization requirements, please contact technical support.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | N-BK7 |
| Diameter | 12.7 mm |
| Clear Aperture Dimension [of Diameter] | >90% of Diameter |
| Operating Wavelength | 1050-1700 nm |
| Focal Length | 20.0 mm |
| Back focal length | 17.3 mm |
| Optical power | 50 |
| Abbe Number v_d | v_d=64.17 |
| Design Wavelength | 587.6 nm |
| Refractive Index | 1.515 |
| Radius | 10.3 mm |
| Center Thickness | 4 mm |
| Edge Thickness | 1.8 mm |
| Coating | Antireflection Coating |
| Antireflection Coating R_avg [@ 1050-1700 nm] | R_avg< 0.5% @ 1050-1700 nm |
| Diameter Tolerance | +0.00/-0.10 mm |
| Thickness Tolerance | ± 0.1 mm |
| Focal Length Tolerance | ± 1% |
| Decentration | < 3 arcmin |
| Surface figure PV value | λ/4 |
| Spherical surface fringe count | 3 |
| Surface flatness [@633 nm] | λ/2 |
| Surface quality (scratch/dig) | 40/20 |
Key Features
Datasheet
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Supplier Information
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