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2.4 inch Fresnel Lens for DIY Projector

Specification

[Product Name] Fresnel Lens for DIY Projector

[Manufacturer] Shandong Yuying Optical Instrument Co., Ltd
[Available Sizes] Optical-grade PMMA (Acrylic)

[Lens Type] Front Projection Fresnel Lens

[Dimension] 64x37mm (2.4 inch)
[Focal Length] 40mm

[Groove Pitch] 0.3mm

[Optical Design] High Precision Micro-Structured Surface
[Manufacturing Process] Injection Molding with Precision Tooling


What is a Fresnel lens for DIY projectors?
A Fresnel lens for DIY projectors is a lightweight optical lens that focuses and directs light efficiently, enabling brighter and clearer projection in compact systems.

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Fresnel Lens for DIY Projector | 2.4 Inch Front Projection PMMA Lens | 70mm Focal Length High Precision Optical Design


This 2.4-inch Fresnel lens is a high-efficiency optical component designed for DIY projector systems, delivering precise light focusing, uniform illumination, and compact integration.


Core Features:

  • Designed for front projection systems to enhance light focusing efficiency
  • 70mm focal length ideal for DIY and compact projector setups
  • Fine groove pitch (0.3mm) ensures improved image sharpness and reduced distortion
  • High transparency PMMA for maximum light transmission
  • Lightweight and durable for portable optical devices

Applications:

  • DIY projectors
  • Mini / portable projection systems
  • Optical experiments and prototyping
  • Educational and display optics



Customization Services

Yuying provides customized Fresnel lenses for projectors, tailored in terms of focal length, dimensions, and groove design.


  • Custom Fresnel lenses available in varied sizes, shapes and focal lengths
  • Optimized thread pitch/tooth profile: Enhances resolution, clarity and brightness
  • Eccentric condenser lens technology: Expands keystone correction range for optimal viewing in both desktop/ceiling installations
  • Front-rear lens configuration improves light utilization efficiency


Q1: What is the difference between front and rear Fresnel lenses?
A: Front Fresnel lenses focus light before projection, while rear Fresnel lenses distribute light behind the screen.

Q2: Is this lens suitable for DIY projectors?
A: Yes, it is optimized for DIY and compact projection systems.

Q3: What does 0.3mm groove pitch mean?
A: It indicates fine optical structure, improving clarity and reducing distortion.

Q4: Can I customize the focal length?
A: Yes, focal length, size, and optical parameters can be customized.




Advantages

Improved Brightness Uniformity: Eliminates center-brightness and edge-dimming issues
Enhanced Light Efficiency: Reduces light loss during transmission through the panel
Hotspot Suppression: Effectively minimizes hotspot effects, protecting display components
Front & Rear Fresnel Configuration: Front lens collimates light; rear lens focuses it for optimal output
Flexible Installation: Suitable for both ceiling-mounted and desktop projectors with keystone correction support

A Fresnel lens is essential for improving projection brightness and focus in compact optical systems.

Front projection Fresnel lenses are widely used in DIY and portable projector designs.


Functions

Fresnel lenses perform beam collimation and focusing:

1. Convert point sources into parallel light, significantly enhancing edge brightness of display panels while eliminating sunspot effects and improving overall brightness uniformity
2. Typically used with other optical components (e.g. cylindrical lenses)
3. Removing collimation lenses causes substantial light loss through panels, resulting in noticeable hotspots and reduced edge brightness
4. On the reverse side of LCD screens, light must be converged from panels to projection lenses



Application Examples

  • Portable Projectors: Ultra-thin Fresnel lenses enable compact optical engines as small as the palm of your hand.
  • Rear-Projection TVs: Large-format Fresnel screens are used for light diffusion and viewing angle control.
  • 3LCD/DLP Projection Technology: Both rely on Fresnel lenses as key optical components for light collimation and concentration.

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