| Place of Origin: | Wuhan,China |
|---|---|
| Brand Name: | Wuhan Siwer Optics |
| Minimum Order Quantity: | 10 pieces |
| Price: | 3-20USD/piece |
| Packaging Details: | 1.Tissue paper.plastic foam packaging film And hard carton box with quakeproof filler |
| Delivery Time: | 4-5 weeks |
| Supply Ability: | 2000 pieces/month |
| Material: | BK7 | Type: | Plano Concave |
|---|---|---|---|
| Diameter Range: | 4-260mm | Demension Tolerance: | +/-0.1mm |
| Surface Quality: | 40/20 | Surface Accuracy: | Lambda/4 In 25.4mm |
| Centration: | 3 Arc Min | Usage: | Optical System |
| Coating: | Customized | ||
| High Light: | pcv lens,plano concave mirror |
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Our N-BK7 Plano-Concave lenses are available uncoated or coated with a variety of multi-layer antireflection coatings. All lenses feature λ/4 surface accuracy and 40-20 scratch-dig surface quality. N-BK7 is an excellent lens material for most visible and NIR applications. It provides great performance at a good value with its high homogeneity, low bubble and inclusion content and straightforward manufacturability.
| Common Specifications | |
| Lens Shape | Plano-Concave |
| Substrate Material | N-BK7 or H-K9L |
| Wavelength Range | 350 nm - 2.0 µm |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Focal Length Tolerance | ±1% |
| Design Wavelength | 587.6 nm |
| Index of Refraction@ 633 nm | 1.515 |
| Surface Quality | 40-20 Scratch-Dig |
| Surface Flatness(Plano Side) | λ/2 |
| Spherical Surface Accuracy (Concave Side) | 3λ/2 |
| Surface Irregularity(Peak to Valley) | λ/4 |
| Abbe Number | vd = 64.17 |
| Centration | <3 arcmin |
| Clear Aperture | >90% of Diameter |
