Products, Materials + Tools | Feb 19, 2013

LEDiL Introduces HELENA – Family of New Precision Fresnel Optics

The New Fresnel lens from Ledil – HELENA - is an excellent example of our precision engineering. The molding tool has been engineered to exacting standards using Diamond turning methods. This production method produces some of the highest quality optics in the world and allows Ledil to manufacture to an accuracy of a hundredth of a millimetre, thus giving great control of the light - turning light into lighting the LEDiL way.

Features and Benefits:
•    Precise diamond turned moulded surfaces replicate designed optical shape with exact precision
•    Narrow viewing angle with good efficiency
•    Fresnel type folded prism optical design allows very flat design of the fixture

There are 2 variants - the HELENA-A is designed for a maximum intensity peak, giving good on axis candela values. HELENA-B is manufactured with some pillow texturing on the top side of the lense to widen and smooth the light fractionally.

•    Diameter: 72,8 mm
•    Height: 11 mm
•    For Philips Lumileds LUXEON K -series
•    Mould surfaces are diamond turned to replicate original designed geometry to the highest precision standards
•    A-version has clear surfaces and efficient fresnel-design for maximum intensity peak when color shifting is not an issue
•    Precision-moulded from optical grade PMMA – UL94 HB rated material with operating rating -40°C to +100°C
•    Typical applications: Stage lighting, indoor architectural and other applications where maximum intensity of the light source is critical.

•    Diameter: 72,8 mm
•    Height: 11 mm
•    For Philips Lumileds LUXEON K -series
•    Pillow surfaced front face for uniform color rendition
•    Precision-moulded from optical grade PMMA – UL94 HB rated material with operating rating -40°C to +100°C
•    Typical applications: Indoor architectural, flat luminaire designs, stage lighting, retail lighting

HELENA is designed to work with Philips Lumileds LUXEON K series LEDs and it produces 22˚ beam angle. The HELENA has been designed to sit very close to light source this allowing compact fixture design.

For additional information, please visit for extra information and product cards

About LEDiL:
The only true specialist in the field of secondary optics for high-power and lighting-class LEDs, LEDiL has been producing precision-engineered optics and reflectors since 2002 and now boasts over 1300 standard products optimized for use with LEDs produced by the world’s prominent LED manufacturers.
Custom solutions are also commonly developed with minimal end-user tooling investment required. With production in Finland and China and a global network of authorized distributors, LEDiL’s products are market-competitive and readily available.
LEDiL – turning light into lighting -