A negative Fresnel lens with a focal length of -255.3 mm and a clear aperture of 0.508 mm, designed for infinite conjugate ratios. The lens has a thickness of 1.8 mm and an equivalent plano conjugate distance of 302.0 mm. The standard material is PMMA with a refractive index of 1.49, and facet spacing is consistent with the specified focal length at 546 nm, with a tolerance of ±5%.
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 | DC 434U neg |
| Product Name | Negative Fresnel Lense |
| Lens Type | Fresnel Lens |
