Positive Fresnel lenses are designed to manage light with plano-convex profiles, optimized for finite or infinite conjugate applications. The SC 235 has a focal length of 50.8 mm, a clear aperture of 77.0 mm, and a thickness of 1.8 mm, with the object conjugate at infinity and the image conjugate at 50.8 mm. Facet spacing is 0.229 mm. All lenses in this series are manufactured from PMMA with a refractive index of 1.49 and are standardized to 1.8 mm thickness, though other thicknesses ≥0.8 mm are available. Outside dimensions may extend up to 20 mm beyond the clear aperture.
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 235 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
