Aspherically Contoured Fresnel Lenses

A Fresnel lens replaces the curved surface of a conventional lens with a series of concentric grooves, molded into the surface of a thin, lightweight plastic sheet. The grooves act as individual refracting surfaces, like tiny prisms when viewed in cross section, bending parallel rays in a very close approximation to a common focal length. Because the lens is thin, very little light is lost by absorption. Fresnel lenses are a compromise between efficiency and image quality. High groove density allows higher quality images, while low groove density yields better efficiency (as needed in light gathering applications). In infinite conjugate systems, the grooved side of the lens should face the longer conjugate.

Fresnel lenses are most often used in light gathering applications, such as condenser systems or emitter/detector setups. Fresnel lenses can also be used as magnifiers or projection lenses; however, due to the high level of distortion, this is not recommended.

#32-595 - Designed for finite conjugates of 4f (grooved side) and 4/3*f (flat side).
#43-021 - Designed with infinite conjugate on flat side.

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Description Stock No. Price In Stock  
Showing 1-10 of 10 Items | Sort by Spec
Aspheric Fresnel Lens 0.6" X 0.6", 0.2" FL
NT43-021 $22.50 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 400
Dimensions (inches) 0.6 x 0.6
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 0.2
Effective Focal Length EFL (inches) 0.20
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 2.0" X 2.0", 1.0" FL
NT46-389 $25.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 200
Dimensions (inches) 2.0 x 2.0
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 1.3
Effective Focal Length EFL (inches) 1.00
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 1.0" X 1.0", 0.4" FL
NT43-022 $22.50 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 250
Dimensions (inches) 1.0 x 1.0
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 0.5
Effective Focal Length EFL (inches) 0.40
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 1.5" X 1.5", 0.6" FL
NT43-023 $22.50 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 200
Dimensions (inches) 1.5 x 1.5
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 1.0
Effective Focal Length EFL (inches) 0.60
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 10.4" Diameter, 9.0" FL
NT46-390 $99.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 100
Diameter (inches) 10.4
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 10.0
Effective Focal Length EFL (inches) 9.00
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 2.5" X 2.5", 2.0" FL
NT43-025 $25.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 110
Dimensions (inches) 2.5 x 2.5
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 2.0
Effective Focal Length EFL (inches) 2.00
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 1.5" X 1.5", 1.0" FL
NT32-588 $25.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 100
Dimensions (inches) 1.5 x 1.5
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 1.0
Effective Focal Length EFL (inches) 1.00
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 10.4" Diameter, 8.0" FL
NT32-595 $99.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 200
Diameter (inches) 10.4
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 10.0
Effective Focal Length EFL (inches) 8.00
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 2.0" x 2.0", 0.85" FL
NT32-587 $25.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 200
Dimensions (inches) 2.0 x 2.0
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 1.3
Effective Focal Length EFL (inches) 0.85
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
Aspheric Fresnel Lens 2.3" X 2.3", 1.3" FL
NT32-589 $25.00 In stock and ready to ship. Click to add this item to your cart.
Groove Density (grooves/inch) 125
Dimensions (inches) 2.3 x 2.3
Dimensional Tolerance (inches) ±0.05
Effective Diameter (inches) 2.0
Effective Focal Length EFL (inches) 1.30
Focal Length Tolerance (%) ±5
Center Thickness CT (inches) 0.06
Thickness Tolerance (%) ±40
Index of Refraction nd 1.49
Transmission (%) 92 (from 400-1100nm)
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
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