T-LA1270-AB - N-BK7 Plano-Convex Lens, Ø18 mm, f = 25 mm, AR Coating: 400 - 1100 nm
Product Drawing
- Material: N-BK7
- AR-Coated for the 400 - 1100 nm Range
- Focal Lengths Available from 10 mm to 2500 mm
- Diameter 18.0 mm
- Focal Length (mm) 24.9
- Diopter +40.2
- Radius of Curvature (mm) 12.9
- Center Thickness (mm) 5.5
- Edge Thickness (mm) 1.8
- Back Focal Length (mm) 21.3
| Common Specifications |
|
Lens Shape
|
Plano Convex |
|
Substrate Material
|
N-BK7 (Grade A) |
|
AR Coating Range
|
400 - 1100 nm (-AB Coating) |
Reflectance over Coating
Range (Avg.) @ 0° AOI Per Surface
|
<1.0% |
|
Diameters Available
|
Ø1/2", Ø1", and Ø2" |
|
Design Wavelength
|
587.6 nm |
|
Index of Refraction @ 633 nm
|
1.515 |
|
Surface Flatness (Plano Side)
|
λ/2 |
Spherical Surface Power
(Convex Side)
|
3λ/2 |
Surface Irregularity
(Peak to Valley)
|
λ/4 |
|
Surface Quality
|
40-20 Scratch-Dig |
|
Thickness Tolerance
|
±0.1 mm |
|
Diameter Tolerance
|
+0.0 / -0.1 mm |
|
Centration
|
<3 arcmin |
|
Damage Threshold
|
@532 nm |
7.5 J/cm2
(10 ns, 10 Hz, Ø0.456 mm) |
| @1064 nm |
7.5 J/cm2
(10 ns, 10 Hz, Ø0.407 mm) |
|
Abbe Number
|
vd = 64.17 |
|
Clear Aperture
|
>90% of Diameter |
|
Focal Length Tolerance
|
±1% |
