Home /Products /LED Optical Fresnel Lens /Fresnel Lens

Circular LED Fresnel Lens FL406mm

Specification

[Product Name] Circular LED Fresnel Lens

[Brand] YuYing
[Material] PMMA
[Available Dimensions] Up to Φ300mm
[Focal Length] 406mm
[Groove Pitch] 0.5mm

[Optical Structure] Precision Fresnel Lens
[Customization Service] OEM & ODM Supported

Request a Quote

Circular LED Fresnel Lens 406mm Focal Length for Underwater LED Searchlight Beam Enhancement

Shandong Yuying Optical: 30+ years in precision Fresnel optics, ISO-certified, serving global display systems.

This circular LED Fresnel lens is engineered for underwater searchlight systems requiring long-distance beam projection and stable optical performance in high-pressure, moisture-rich environments. With a 406mm focal length and 0.5mm precision groove structure, the lens significantly enhances beam concentration, penetration, and directional stability. Manufactured from optical-grade PMMA and customizable up to Φ300mm, it is suitable for marine lighting, diving equipment, underwater exploration systems, and professional search illumination devices.

Customized Services

1. High precision: Tip Width (R) ≤ 0.005mm, with loop distance as small as 0.02mm.
2. Molds capacity: We can process lens molds ranging from as small as 1mm to as large as 2200mm in diameter, accommodating a wide variety of specifications.
3. Focus Distance Design: We can design and manufacture lenses with focal lengths as short as 1mm and as long as 10 meters or more, suitable for different application scenarios.
4. Superior Surface Finish: Surface roughness Ra ≤ 0.014μm (14nm), with Ra ≤ 0.002μm achievable within a 150mm diameter, ideal for high-performance applications

Key Features

Advantages

Circular optical design optimized for uniform beam symmetry
Enhances long-range beam penetration in underwater environments
0.5mm precision groove structure improves optical focusing efficiency
Stable performance under high humidity and pressure conditions
Lightweight PMMA construction ensures corrosion resistance
Customizable diameter up to Φ300mm for different searchlight systems
OEM/ODM support for specialized underwater optical projects

Technical Specifications

Focal Length: 406mm
Groove Pitch: 0.5mm
Maximum Diameter: Φ300mm
Material: Optical Grade PMMA
Lens Type: Circular LED Fresnel Lens
Application Environment: Underwater / Marine Optical Systems

Customer also Ask

Q: Why is a Fresnel lens used in underwater searchlights?
A: It improves beam concentration and reduces light loss, allowing deeper and farther underwater visibility.

Q: Is PMMA suitable for underwater optical applications?
A: Yes. PMMA offers excellent optical clarity, corrosion resistance, and stable performance in humid environments.

Q: What advantage does a 406mm focal length provide?
A: It enables stronger beam focusing and longer projection distance, which is critical for underwater search operations.

Q: Can this lens be customized for marine equipment?
A: Yes. The lens can be customized up to Φ300mm for different underwater lighting systems.