UV Fused Silica Positive Meniscus Lens
- Positive meniscus lens has positive focal length.
- These lenses can converge light to form real image.
- Suitable for high power beam focusing application.
- These lens increase NA (Numerical Aperture) when introduced in an optical system.
- UV fused silica offers high transmission in UV region.
- UV fused silica exhibits low laser-induced fluorescence.
- Fused silica has high bulk damage threshold and lower thermal coefficient compared to N-BK7.
Application Notes
- Positive Meniscus for Imaging : When a positive meniscus lens is combined with another lens, the focal length is shortened and the numerical aperture of the system is increased, this reduces the image distortion and increases image resolution.
- Positive Meniscus for Beam Focusing : Positive meniscus lens exhibit minimal spherical aberrations and reduced spot sizes when focusing a (infinite conjugate) collimated beam, with convex side facing collimated beam.
- Positive Meniscus uses : Positive meniscus lens are used as single or in multi-elemental camera lens, high power beam-expander intermediate Lens and wherever focal Length decrement with NA increment is needed.
Specification
- Material : UV Fused Silica
- 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 : 193 nm- 2.1 µm. (Un-Coated)
- AR Coatings available : A)BBARC ; B) Laser V-Coating. Note : 1. To avoid reflection losses which result in ghost images, we suggest you to use AR-coating from our coating catalogue.
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
UV FUSED SILICA POSITIVE MENISCUS Lens- Diameter 25 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PM-25-075FS | 25 | 75 | 69.2 | 5 | 2.4 | |||
| PM-25-100FS | 25 | 100 | 95.1 | 4.2 | 2.4 | |||
| PM-25-125FS | 25 | 125 | 120.4 | 3.8 | 2.4 | |||
| PM-25-150FS | 25 | 150 | 146.2 | 3.6 | 2.4 |
UV FUSED SILICA POSITIVE MENISCUS Lens- Diameter 50 mm
| Quantity | Doc | Part Number | Diameter (mm) | Focal Length (mm) | Back Focal Length (mm) | Center Thickness (mm) | Edge Thickness (mm) | |
|---|---|---|---|---|---|---|---|---|
| PM-50-150FS | 50 | 150 | 140.5 | 9 | 4 | |||
| PM-50-200FS | 50 | 200 | 192 | 7.8 | 4.2 | |||
| PM-50-250FS | 50 | 250 | 242.9 | 7.1 | 4.3 |