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Description

Our SC series lenses are crafted through advanced injection molding and compression molding technologies, insuring a superior surface quality and by that optical performance.

The unique design of our polymer Fresnel lenses not only ensures optimal optical performance but also offers significant advantages. Compared to traditional glass lenses our lenses provide substantial weight, space and cost reductions making them indispensable in lighting, sensor, and machine vision applications.

At ORAFOL Fresnel Optics we take pride in offering comprehensive solutions, from optical design and prototyping to tooling and high-volume production. Whether you choose one of our standard products or opt for a custom solution, including high-volume production, we are committed to meet your specific requirements.

Customization options include precise trimming to desired shape, changing of thickness (>0.8 mm) and material (PMMA, Polycarbonate, silicone on glass), optical coating (reflective and anti-reflective coating of various kinds) and combination with other components (diffusive microstructures, microlens arrays) directly into the plano side of the lens. A completely new design of the microstructure specificly made for your application including tooling and prototyping is also possible. Contact us for details.

Positive Fresnel Lens SC 237

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Specifications

Material: PMMA Acrylic
Lens Type: Non-Imaging - Spot, Positive
Focal Length: 77.5 mm
Facet Spacing: 0.254 mm
Fresnel Conjugate: Not Specified
Clear Aperture: 59.4 mm
Thickness: 1.8 mm

Got questions about specs? Use the inquiry form to ask.

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Features

  • Lightweight, volume-efficient design
  • High apertures and optically effective surfaces
  • Cost-effective solutions for diverse applications
  • Expertly crafted with cutting-edge technology
  • Backed by ORAFOL Fresnel Optics' legacy of top-quality manufacturing

Applications

  • Advanced lighting applications
  • Optical sensor technology
  • Machine vision systems

Frequently Asked Questions

What are the typical applications of Positive Fresnel Lenses?
Positive Fresnel lenses are commonly used in solar concentrators, projection systems, magnifiers, and illumination systems. They are ideal for applications requiring efficient light management and col
What is the material used for these lenses?
The standard material for Positive Fresnel Lenses is PMMA (Polymethyl Methacrylate), which has a refractive index of 1.49. Other materials are available upon request.
How is focal length determined for these lenses?
The listed focal lengths apply to 546 nm for PMMA material with a tolerance of ±5%. These values can vary slightly depending on the material used and specific design requirements.
What are the available thickness options for the lenses?
The standard thickness of Positive Fresnel Lenses is 1.8 mm, but other thickness options, starting from 0.8 mm, can be provided upon request.
Can these lenses be customized?
Yes, special designs and dimensions are available upon request. Lenses can be customized in terms of size, focal length, and thickness to meet specific project needs.
What is the clear aperture of these lenses?
The clear aperture varies with the model. It ranges from small sizes like 6.4 mm to large apertures of up to 615.7 mm, depending on the focal length.
Are there specific wavelengths for which these lenses are optimized?
Positive Fresnel Lenses are optimized for a wavelength of 546 nm. Custom designs for other wavelengths are available upon request.
What is the facet spacing of the lenses?
The facet spacing depends on the specific lens model and can range from 0.076 mm to 0.762 mm. The number of lines per millimeter can be determined using the inverse of the facet spacing.
Can the lenses handle high temperatures or outdoor environments?
While PMMA has good environmental stability, additional coatings or materials can be used to enhance performance in high-temperature or outdoor environments. Custom options are available based on application requirements.
What is the tolerance for the dimensions of these lenses?
The tolerance for focal lengths is typically ±5%, and the outer diameter or size can extend beyond the clear aperture by 5-20 mm. Further customization can be done on request.

Got more questions? Use the inquiry form to ask the supplier directly.

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