Positive Fresnel lenses are used to collect or collimate light with minimal thickness. The SC 917 is a plano Fresnel lens with a focal length of 239.6 mm, a clear aperture of 386.4 mm, and a thickness of 1.8 mm, designed for infinite conjugate on the Fresnel side. The standard material is PMMA, and the focal length applies to 546 nm light with a tolerance of ±5%. All specified dimensions are as measured with the standard 1.8 mm thickness.
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 917 |
| Product Name | Positive Fresnel Lense |
| Lens Type | Fresnel Lens |
