Positive Fresnel lenses are optical elements designed to collimate or collect light with minimal thickness. The SC 264 Fresnel lens has a focal length of 234.7 mm, a clear aperture of 253.1 mm, and a uniform thickness of 1.8 mm, with the plano side conjugate at infinity. The facet spacing is 0.508 mm, and the lens is manufactured from PMMA with a refractive index of 1.49. Outside dimensions may extend up to 5-20 mm beyond the clear aperture. Focal lengths are calibrated for 546 nm and have a tolerance of ±5%.
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 264 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
