Square Fresnel Lens 200x200 mm, 330 mm Focal Length, PMMA
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Prices updated: 14 Oct 2026
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About this product
A square 200 x 200 mm Fresnel lens made from PMMA (acrylic), 2 mm thick with a 0.5 mm groove pitch. It has a 330 mm focal length, 92% light transmission and a refractive index of 1.5. It is used for focusing light in optics experiments, demonstrations and DIY optical setups.
Specifications
- Size
- 200 x 200 mm
- Thickness
- 2 mm
- Material
- PMMA (acrylic)
- Groove pitch
- 0.5 mm
- Focal length
- 330 mm
- Light transmission
- 92%
- Refractive index (nd)
- 1.5
- Max operating temperature
- 80 °C
Frequently asked questions
What does the 330 mm focal length mean?
Parallel light entering the lens converges at a point about 330 mm behind it. Placing the target or sensor at that distance gives the sharpest focus.
Can it be used near heat sources?
The maximum operating temperature is 80 °C, so keep it away from open flames and hot surfaces. PMMA can deform under heat, so mount the lens in a frame that supports its edges.
