Positive Fresnel lenses are designed to manage light with plano-facet structures for collimation or focusing. The SC 223 lens has a focal length of 152.8 mm, a clear aperture of 202.4 mm, and a thickness of 1.8 mm, with infinity conjugate on the Fresnel side and 152.8 mm conjugate on the plano side. All listed lenses in this series use PMMA material with a refractive index of 1.49 and standard thickness of 1.8 mm, though other thicknesses down to 0.8 mm are possible. Focal lengths are specified for 546 nm wavelength with ±5% tolerance.
Positive Fresnel Lenses can be designed as a collimator, collector or with finite conjugates. They are usually corrected for spherical aberration.
The designs can be trimmed according to customer requirements (within limits of clear aperture). It is possible to combine a Fresnel lens structure with other structures like diffusers or microlens arrays in the same part through double-sided structuring. Optical coatings for increased efficiency are possible.
| ORAFOL Fresnel Optics GmbH | |
|---|---|
| Product Category | Optical Lenses |
| Product Number | SC 223 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
