Optics & optical coatings
Guide
ME-Optics Selection Guide
The lens or a combination of these lenses found in this section will have limited applications compared with single spherical lens but very high performance can be achieved in a dedicated application.
Beam Focusing
| Type | Features | Applications |
|---|---|---|
| Achromatic Lens | Chromatic and spherical aberration is minimized. Large line-up of focal length and aperture. |
Focus ability in low power lasers. Imaging system for infinity object |
| Focusing Lens | High laser damage threshold Spot size is minimized and near to the diffraction limit. |
Lens for various laser fabrication such as laser marking, cutting and welding. |
| Objective Lens | Highly corrected lens with high magnification Large numerical aperture produces minimum spot size. Fully usable throughout the visible wavelength spectrum. |
Microscopic imaging for the visible, ultra-violet and near infrared wavelength spectrum. Focusing a laser beam into a minimal spot. Micro-fabrication for lasers. |
Beam Expanding
| Type | Features | Applications |
|---|---|---|
| Beam Expander | Optimized design for minimum spherical aberration Integrated design with reduced size |
Magnifying the laser aperture (for interferometer and projection) Reducing the focal spot size (by enlarging the incident laser beam diameter) |
| Spatial filter (objective lens) + Achromatic lens |
Large choice of expansion ratios. Provides a high purified beam profile. |
When using a very large collimated beam. When changing the beam aperture (with switching the achromatic lenses) |
