The SC 259 neg is a negative Fresnel lens with a focal length of -18.3 mm at 546 nm in PMMA, a clear aperture of 0.254 mm, and a thickness of 1.8 mm. It is designed for infinity-to--18.3 mm conjugate pairs with a facet spacing corresponding to 1/facet spacing, and the outside diameter may extend up to 5-20 mm beyond the clear aperture. The standard material is PMMA with a refractive index of 1.49.
A negative Fresnel lens is the opposite of a positive Fresnel lens with diverging light rays.
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 259 neg |
| Product Name | Negative Fresnel Lense |
| Lens Type | Fresnel Lens |
