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.

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Description Stock No. Price In Stock  
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2.3" X 2.3", 1.5" Focal Length, Fresnel Lens
NT43-024 $25.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 2.3 x 2.3
Effective Diameter (inches) 2.0
Effective Focal Length EFL (inches) 1.50
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
2.5" X 2.5", 5" Focal Length, Fresnel Lens
NT32-681 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 2.5 x 2.5
Effective Size (inches) 2.5 x 2.5
Effective Focal Length EFL (inches) 5.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 7.9" Focal Length, Fresnel Lens
NT32-682 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 25
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.6
Effective Focal Length EFL (inches) 7.90
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 2.6" Focal Length, Fresnel Lens
NT32-590 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.5
Effective Focal Length EFL (inches) 2.60
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 3.3" Focal Length, Fresnel Lens
NT43-011 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.5
Effective Focal Length EFL (inches) 3.30
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 3.6" Focal Length, Fresnel Lens
NT43-012 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.5
Effective Focal Length EFL (inches) 3.60
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 3" Focal Length, Fresnel Lens
NT32-591 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.5
Effective Focal Length EFL (inches) 3.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
3.0" X 3.0", 3.9" Focal Length, Fresnel Lens
NT32-592 $29.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 3.0 x 3.0
Effective Diameter (inches) 2.5
Effective Focal Length EFL (inches) 3.90
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
5" X 5", 4" Focal Length, Fresnel Lens
NT46-614 $45.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 100
Dimensions (inches) 5.0 x 5.0
Effective Diameter (inches) 4.0
Effective Focal Length EFL (inches) 4.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
5.0" X 5.0", 2.8" Focal Length, Fresnel Lens
NT32-683 $42.50 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 100
Dimensions (inches) 5.0 x 5.0
Effective Diameter (inches) 4.0
Effective Focal Length EFL (inches) 2.80
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
5.0" X 5.0", 5" Focal Length, Fresnel Lens
NT32-684 $45.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 5.0 x 5.0
Effective Diameter (inches) 4.0
Effective Focal Length EFL (inches) 5.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
5.5" X 5.5", 10" Focal Length, Fresnel Lens
NT43-013 $79.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 100
Dimensions (inches) 5.5 x 5.5
Effective Diameter (inches) 5.0
Effective Focal Length EFL (inches) 10.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
6.7" X 6.7", 3" Focal Length, Fresnel Lens
NT32-593 $80.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 100
Dimensions (inches) 6.7 x 6.7
Effective Diameter (inches) 6.0
Effective Focal Length EFL (inches) 3.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
6.7" X 6.7", 6" Focal Length, Fresnel Lens
NT32-594 $80.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 125
Dimensions (inches) 6.7 x 6.7
Effective Diameter (inches) 6.0
Effective Focal Length EFL (inches) 6.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
6.7" X 6.7", 10" Focal Length, Fresnel Lens
NT32-685 $80.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 100
Dimensions (inches) 6.7 x 6.7
Effective Diameter (inches) 6.0
Effective Focal Length EFL (inches) 10.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
6.7" X 6.7", 12" Focal Length, Fresnel Lens
NT32-686 $80.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 50
Dimensions (inches) 6.7 x 6.7
Effective Diameter (inches) 6.0
Effective Focal Length EFL (inches) 12.00
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
8.5" X 10.5", 18" Focal Length, Fresnel Lens
NT43-015 $80.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 143
Dimensions (inches) 8.5 x 10.5
Effective Size (inches) 8.5 x 10.5
Effective Focal Length EFL (inches) 18.00
Center Thickness CT (inches) 0.09
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
10.4" Diameter, 12.5" Focal Length, Fresnel Lens
NT32-596 $99.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 120
Diameter (inches) 10.4
Effective Diameter (inches) 10.0
Effective Focal Length EFL (inches) 12.50
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
10.4" Diameter, 19.5" Focal Length, Fresnel Lens
NT43-017 $99.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 50
Diameter (inches) 10.4
Effective Diameter (inches) 10.0
Effective Focal Length EFL (inches) 19.50
Center Thickness CT (inches) 0.06
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
11.0" X 11.0", 13.8" Focal Length, Fresnel
NT43-018 $99.00 In stock and ready to ship. Click to add this item to your cart.
Grooves/inch 64
Dimensions (inches) 11.0 x 11.0
Effective Size (inches) 10.5 x 10.5
Effective Focal Length EFL (inches) 13.80
Center Thickness CT (inches) 0.09
Focal Length Tolerance (%) ±5
Dimensional Tolerance (inches) ±0.05
Thickness Tolerance (%) ±40
Transmission (%) 92 (from 400-1100nm)
Index of Refraction nd 1.49
Operating Temperature (°C) 80 (Maximum)
RoHS Compliant
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