The SC 949 is a positive Fresnel lens designed for collimating or focusing light, with a focal length of 97.1 mm and a clear aperture of 201.8 mm. It has a thickness of 1.8 mm and is engineered to operate with an infinite conjugate on the plano side. The lens is made of PMMA with a refractive index of 1.49 and is corrected for spherical aberration. The facet spacing is 0.254 mm, and the outside diameter may extend up to 5-20 mm beyond the clear aperture. Focal lengths are specified for 546 nm wavelength with 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 949 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
