Positive Fresnel lenses are designed to manage light in applications requiring collimation or focusing, with SC 250 featuring a focal length of 69.6 mm, clear aperture of 75.4 mm, thickness of 1.8 mm, and infinite conjugate on the plano side. The lens is made of PMMA, standardized for 546 nm wavelength with a refractive index of 1.49 and tolerance of ±5%. All listed lenses in the series have a consistent thickness of 1.8 mm except where noted. Outside dimensions may extend up to 5-20 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 250 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
