N-BK7 Plano Concave Lens
- Plano-concave lens has negative focal length.
- PCV lens diverges light to form virtual images.
- Suitable for simple light diversion applications.
- N-BK7 lenses are general purpose and low cost lenses.
Application Notes
- PCV for Beam Diversion : PCV is used with collimated beam to diverge it on other side. Placing curved surface towards collimated beam reduces spherical aberration.
- PCV in an Optical System : PCV lens when placed in an optical system, increase the focal length of the system with additional benefits of offsetting spherical aberrations caused by other lenses within the system.
- PCV in Scanners : PCV is used for scanning in medical equipment and CD/DVD players, where laser beam is diverged to sharply access a specific area.
Specification
- Material : N-BK7
- Focal length : ±1%.
- Diameter available : Ø5 to Ø100.
- Diameter Tolerance : +0/-0.1 mm.
- Clear aperture : 90%.
- Center Thickness : ±0.1mm.
- Centeration : Better than 3 arc min.
- Surface Irregularity : Lambda/4 @ 632.8 nm.
- Surface quality : 40-20 Scratch-Dig.
- Design Wavelength : 587.6 nm.
- Wavelength range : 350 nm- 2 µm. (Un-Coated)
- AR Coatings available : A)BBARC ; B) Laser V-Coating.
2. For good performance under low light conditions, we suggest you to use AR-coating from our coating catalogue.
3. Customized designs are available from diameters of 3 mm to 300 mm with your specifications and coating options.
Product Matrix
N-BK7 Plano Concave Lens- Diameter 5 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PCV-5-10 | 5 | -10 | -10.5 | 0.7 | 1.3 | |||
| PCV-5-15 | 5 | -15 | -15.6 | 0.9 | 1.3 | |||
| PCV-5-20 | 5 | -20 | -20.5 | 1 | 1.3 |
N-BK7 Plano Concave Lens- Diameter 10 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PCV-10-20 | 10 | -20 | -20.6 | 1.1 | 2.4 | |||
| PCV-10-25 | 10 | -25 | -25.8 | 1.1 | 2.1 | |||
| PCV-10-30 | 10 | -30 | -30.7 | 1.1 | 1.9 |
N-BK7 Plano Concave Lens- Diameter 12.5 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PCV-12.5-25 | 12.5 | -25 | -26 | 1.3 | 2.9 | |||
| PCV-12.5-50 | 12.5 | -50 | -51.6 | 1.3 | 2 | |||
| PCV-12.5-75 | 12.5 | -75 | -76.3 | 1.3 | 1.8 |
N-BK7 Plano Concave Lens- Diameter 25 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PCV-25-050 | 25 | -50 | -50.9 | 2.5 | 5.8 | |||
| PCV-25-075 | 25 | -75 | -76.5 | 2.5 | 4.6 | |||
| PCV-25-100 | 25 | -100 | -102.2 | 2.5 | 4 | |||
| PCV-25-150 | 25 | -150 | -151.6 | 2.5 | 3.5 |
N-BK7 Plano Concave Lens- Diameter 50 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PCV-50-100 | 50 | -100 | -103.9 | 5 | 11.4 | |||
| PCV-50-125 | 50 | -125 | -128.3 | 5 | 10 | |||
| PCV-50-150 | 50 | -150 | -152.9 | 4.5 | 8.6 | |||
| PCV-50-200 | 50 | -200 | -201.9 | 4 | 7.1 |