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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 277

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Specifications

Material: PMMA Acrylic
Lens Type: Non-Imaging - Spot, Positive
Focal Length: 68.5 mm
Facet Spacing: 0.076 mm
Fresnel Conjugate: Not Specified
Clear Aperture: 88.9 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 available focal lengths for the Positive Fresnel Lenses?
The available focal lengths range from 6.3 mm to 764.0 mm, with specific focal lengths including 6.3 mm, 50.8 mm, 234.7 mm, 500.5 mm, and more. Each focal length is designed to suit various optical applications.
What is the standard thickness of these lenses?
The standard thickness for most of the Positive Fresnel Lenses is 1.8 mm, with some models featuring a thickness of 2.5 mm. Custom thickness options are available upon request.
What materials are used in the construction of these lenses?
The standard material used is PMMA (Polymethyl Methacrylate), with a refractive index of 1.49 and a relative dispersion of 58. Other materials can be used depending on specific requirements.
What is the facet spacing in these lenses?
Facet spacing varies across models, ranging from 0.076 mm to 0.762 mm. The spacing affects the focal properties and is an essential factor in lens performance.
Are custom designs or dimensions available?
Yes, special designs, dimensions, and trimming options can be provided based on customer requests. The outside diameter may also exceed the clear aperture by 5-20 mm, depending on specific requirements.
What is the clear aperture of these lenses?
Clear aperture sizes vary from 6.4 mm to 615.7 mm, depending on the specific model. The clear aperture size directly impacts the amount of light the lens can transmit.
Can these lenses operate with wavelengths other than 546 nm?
While the focal lengths are listed for 546 nm light, these lenses can be used with other wavelengths, though the performance may vary. Custom configurations are available to optimize for different wavelengths.
What are the typical applications of these lenses?
These Fresnel lenses are ideal for applications such as solar concentrators, imaging systems, optical sensors, lighting systems, and beam shaping in laser applications.
What is the tolerance for focal lengths?
The focal lengths are specified with a tolerance of ±5%, ensuring high precision and accuracy for various optical applications.
How is the number of lines per mm calculated?
To determine the number of lines per mm, divide 1 by the facet spacing. This calculation is essential for understanding the lens's resolution and light management properties.

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

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