Infrared Aspherical Lenses
Diamond Turned and Molded Infrared Aspheric Lenses
Germanium, Silicon, Chalcogenides and any Infrared Material
Anti Reflective (AR), Highly Durable (HDAR), Diamond Like Carbon (DLC) or spectral filter coatings available
Overview
Aspheres are optical lenses that feature a non-spherical but rotationally symmetric radius of curvature. Unlike spherical lenses, they have a radius of curvature that varies from the center of the lens to the edge which reduces the point of light reception. This has a positive impact on common optical aberrations allowing for an improved single element solution for applications like collimating the output of a fiber or laser diode, coupling light into a fiber, spatial filtering, or imaging light onto a detector. Our Infrared aspheric lenses are often used for collimating light from mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) laser sources, including Quantum Cascade Lasers (QCLs). We also offer acylindrical lenses, which provide the advantages of aspheres in one-dimensional focusing applications and thermal imaging lenses that focus infrared light without introducing spherical aberration.
Typical Tolerances
| ZnSe, ZnS | CaF2, BaF2, MaF2 | Ge, Si | GaAs | Chalcogenide Glass, CdTe, Diamond Turned | Chalcogenide Molded Asphers | KRS-5 | |
|---|---|---|---|---|---|---|---|
| Diameter | 4 – 160 mm | 4-160 mm | 4-350 mm | 4-120 mm | 4-160 mm | 1-50 mm | 10-80 mm |
| Thickness | 1 – 50 mm | 1-50 mm | 1-50 mm | 1-50 mm | 1-50 mm | 0.5-2.5 mm | 1-25 mm |
| Irregularity | 0.25 fr | 0.25 fr | 0.25 fr | 0.25 fr | 0.25 fr | 0.5 fr | 2-4 fr |
| Power | 1 fr | 1 fr | 1 fr | 1 fr | 0.5 fr | 1 fr | 1 fr |
| Radius tolerance | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.50% |
| Roughness | 10A RMS | 10A RMS | 10A RMS | 10A RMS | 10A RMS | 30A RMS | 10A RMS |
| TIR | 30 sec | 30 sec | 30 sec | 30 sec | 30 sec | 0.6 arcmin | 30 sec |
| Dimension tolerance | +/-0.025 mm | +/-0.025 mm | +/-0.025 mm | +/-0.025 mm | +/-0.025 mm | +/-0.01 mm | +/-0.05 mm |
| Diameter Tolerances | +/-0.01 mm | +/-0.01 mm | +/-0.01 mm | +/-0.01 mm | +/-0.01 mm | +/-0.005 mm | +/-0.05 mm |
Coatings
Lightpath offers both standard, and custom optical coatings for its infrared prisms. Those include Anti Reflective (AR), High Durability AR, Spectral Filters, and protective Diamond Like Carbon (DLC) coatings.
All three of our global facilities are vertically integrated and include in-house coating and testing. For further information about available coatings please visit our coatings page or contact us.
IR Aspheric Fabrication
BD6 Aspherical lens
Calcium Flouride (CaF2) Diamond Turned Aspherical Lens
Coated diamond turned germanium lens in housing
Diamond Turned Aspheric Mirror
Diamond Turned Calcium Flouride (CaF2) ASpherical lens
Diamond Turned Polymer (PMM) Asphere and Diffractive patterns
DLC Coated BD6 Lenses
Ge Lens
Germanium Asphere Coated with High Durability Anti-Reflection Coating (HDAR)
HDAR Coated Germanium Lens
Need name
KS 5 Aspheric Lens 2
Silicon (Si) Aspheric Lens Coated with Highly Durable (HD) AR Coating, for 3 5um
Silicon (Si) Aspheric Lens
Silicon diffractive element
Thallium Bromoiodide (KRS-5) Aspheric Lens
Uncoated Molded BD6 Asphere
Zinc Selenaide (ZnSe) Aspheric Lens
Zinc Selenaide (ZnSe) Diamond Turned Asphere
Zinc Sulfide (ZnS) Cleartran Aspheric Lens
ZNSE Aspheric Lens with TIR Prism
Diamond Turned Aluminum Mirror
Diamond Turned BD6 Lens
Diamond Turned Si Lens
Diamond Turned Truncated Germanium Lens
Diamond Turned ZnS Truncated Lens
ZnSe Lens
Infrared Optics Whitepapers
Contact
Jason Messerschmidt
Vice President Of Global Sales & Marketing