Aspheric lenses surpass spherical lenses in terms of radius of curvature, allowing for aberration correction, which leads to improved sharpness and resolution in low laser power and imaging applications. Additionally, the use of aspheric lenses facilitates the miniaturization of lens designs.
Coligh specializes in core technologies such as glass lens replication, surface shaping, and optomechanical/optoelectronic assembly. Leveraging these technologies, Coligh delivers a range of products to its customers, including camera objectives, aspheric lenses, microlens arrays, and collimated laser modules.
Excamples of aspherical lens we processed:
| Model |
Diameter |
Focal length |
Back intercept |
Center thick |
Edge Thickness |
Material |
Shape |
R1 |
R2 |
| A333 |
25 |
21.1 |
14.1 |
10.5 |
2.4 |
H-K51 |
As per drawing above |
-545.94 |
Column 10 Value |
| A335 |
13.4 |
-100.4 |
|
5 |
2.9 |
H-K51 |
As per drawing above |
Aspherical |
Column 10 Value 2 |
Our aspherical lens custom capability:
|
Material
|
Processing Parameter
|
Precision grade
|
| Normal |
Medium |
Custom |
|
Monocrystalline silicon
Single crystal germanium
Chalcogenide glass
Zinc selenide
Zinc sulfide
Optical glass
Quartz
Calcium fluoride
|
Thickness allowance |
±0.5mm
|
±0.1mm |
-0.02mm
|
| Size allowance |
±0.5mm |
±0.1mm |
±0.02mm |
| Eccentricity |
3′ |
1′ |
50″ |
| Curvature error |
1% |
0.6‰ |
0.2‰ |
| Surface ( PV ) |
1μm |
0.5μm |
0.2μm |
| Surface Quality |
60/40 |
40/20 |
10/5 |
| Effective Aperture |
＞90% |
＞90% |
＞90% |
| Surface Roughness |
/ |
/ |
RMS＜0.04μm |
| Focal length: ±5mm~±1000mm±2% |
| Diameter: 10mm to 75mm+0.0/-0.2mm |
