eo_logo
 
Product added to cart

11.0" x 11.0", 19" Focal Length, Fresnel Lens

Aspherically Contoured Fresnel Lenses

×
Stock #32-690 3-4 days
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
£116.45
Qty 1-10
£116.45
Qty 11+
£104.55
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Get Product Downloads
Center Thickness CT (inches):
0.09
Effective Size (inches):
10.5 x 10.5
Groove Density (grooves/inch):
50.00
Thickness Tolerance (%):
±40

Product Details

Type:
Fresnel Lens

Physical & Mechanical Properties

Dimensional Tolerance (inches):
±0.05
Dimensions (inches):
11.0 x 11.0
Dimensions (mm):
279.4 x 279.4

Optical Properties

Effective Focal Length EFL (mm):
482.60
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Acrylic
Coating:
Uncoated
Wavelength Range (nm):
400 - 1100
Effective Focal Length EFL (inches):
19.00
Index of Refraction nd:
1.49
Transmission (%):
85 (Typical)

Environmental & Durability Factors

Operating Temperature (°C):
80 (Maximum)

Regulatory Compliance

RoHS 2015:
Reach 224:
Certificate of Conformance:

Product Family Description

  • Positive Focal Length
  • Square and Rectangular Options
  • Ideal for Light Gathering Applications

Fresnel Lenses replace 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. 

Filter

Fresnel Lens Review

Fresnel lenses are composed of a series of concentric grooves etched into one side of a sheet of plastic. Fresnel lenses are unlike typical spherical or aspherical optical lenses.

View Now

Fresnel lens

How to Determine Magnification of an Optical Lens Setup

When doing basic imaging, how do you determine the magnification an optical lens will provide?

View Now

How to Form an Image with an Optical Lens Setup

Although a common misconception, individual optical lenses do not always form an image when the object plane is placed a focal length away from the lens.

View Now

Diopter

How do I clean my optics?