VIS Cemented Negative Achromatic Doublet
1. Neg. Achr. lens has negative focal length.
2. These lens diverges light to form virtual images.
3. Suitable for light diversion applications where reduced spherical and minimal chromatic shift is nescessary.
4. Consists of a crown lens cemented with a flint lens.
Application Notes
- VCN-AC for Beam Diversion : VCN-AC is used with collimated beam to diverge it on other side. Placing surface with larger radius of curvature opposite of collimated beam is preffered for ideal performance.
- VCN-AC in an Optical System : VCN-AC 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.
- VCN-AC Achromatism : Compared to a singlet negative lens, these VCN-AC lens will perform best under a singlet's monochromatic wavelength as well as in achromatic conditions.
- Diffraction limited performance : 2 element optimized design ensures minimum spherical and chromatic on axis aberrations ensuring diffraction limited performance.
- Applications : These lenses are placed between objective and imaging lenses in microscopy to increase tube length or magnification.
Specification
- Focal length tolerance: ±1%.
- Diameter tolerance: ±0.2 mm.
- Center thickness tolerance: ±0.2 mm.
- Centration: <3 arc-min.
- Spherical surface power: 1 lambda.
- Spherical surface irregularity: lambda /4.
- Surface quality: 40-20 Scratch-Dig.
- Design Wavelengths: 486.1 nm, 587.6 nm, 656.3 nm.
- AR Coating: 400-700 nm BBARC.
Product Matrix
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 10 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-10-25 | 10 | 8 | -25 | -26.64 | 4 | 5 | SK2/SF11 |
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 12.5 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-12.5-20 | 12.5 | 10 | -20 | -22.45 | 4.5 | 6.5 | SK2/SF11 | |||
| VCN-ACD-12.5-25 | 12.5 | 10.6 | -25 | -27.11 | 4.5 | 6.1 | SK2/SF11 | |||
| VCN-ACD-12.5-30 | 12.5 | 10.6 | -30 | -32.11 | 4.5 | 5.8 | SK2/SF11 | |||
| VCN-ACD-12.5-50 | 12.5 | 11.25 | -50 | -52.29 | 4.5 | 4.9 | K5/F2 |
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 15 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-15-30 | 15 | 10 | -30 | -32.53 | 5 | 7 | SK2/SF6 |
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 20 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-20-30 | 20 | 15 | -30 | -33.37 | 7 | 10.5 | SK2/SF6 |
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 25 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-25-40 | 25 | 21.25 | -40 | -43.32 | 7 | 11.1 | SK2/SF11 | |||
| VCN-ACD-25-50 | 25 | 21.25 | -50 | -53.62 | 7 | 10.2 | SK2/SF11 | |||
| VCN-ACD-25-75 | 25 | 22.5 | -75 | -78.21 | 6.5 | 8.9 | K5/SF2 | |||
| VCN-ACD-25-100 | 25 | 22.5 | -100 | -103.21 | 7 | 8.7 | K5/F2 |
VIS CEMENTED NEGATIVE ACHROMAT DOUBLETS DIAMETER- 35 MM
| Quantity | Doc | Part Number | Diameter (mm) | Clear Aperture (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | Materials | |
|---|---|---|---|---|---|---|---|---|---|---|
| VCN-ACD-35-50 | 35 | 28 | -50 | -54.46 | 10 | 16.5 | SK2/SF6 | |||
| VCN-ACD-35-75 | 35 | 30 | -75 | -79.85 | 10 | 14.2 | SK2/SF6 |