LotuTec® is the innovative ZEISS spectacle lens coating that helps you to enjoy clear vision at all times. The water and grease-repellent coating displays a strong beading effect that significantly simplifies cleaning.
The Super ET broadband anti-reflective coating eliminates irritating glare and reflections. The hard coating makes the lens surface tougher.
As with some plant leaves, fluid and dirt particles gather on the surface of the lens.
As with lotus leaves, fluid and dirt simply drip or fall off the lens thanks to the Clean Coat of LotuTec®.
More than good durability
LotuTec® sets pioneering standards in durability. Wearers will enjoy a totally new experience in wearing comfort - thanks to the lotus effect of Clean Coat.
Principle invented by nature
A principle of nature inspired us to invent the outstanding Clean Coat - the lotus effect.
Simply clean - simple to clean
Fluid and dirt simply drip or fall off the lens. Cleaning and lens care are much easier if the lens does get dirty.
ZEISS lenses with LotuTec® AR coating are durable lenses as they are provided with a hard lacquer.
2. Dirt resistant
Thanks to the ultra-smooth Clean Coat, dust and lint do not adhere to the surface easily.
3. Very easy to clean
The super-slick Clean Coat makes lenses very easy to clean. Lenses with high contact angle repel oil and water more effectively.
4. Anti-reflective properties
Green reflection colour provides good anti-reflective properties.
Surface and coating structure
Super ET anti-reflection coating
LotuTec® sets pioneering standards in durability, and that is no empty promise. It has been subjected to a series of very comprehensive and advanced tests. In 18 different set-ups designed to test the coating’s resistance to various conditions – from weather and acid to mechanical stress – an experimental equivalent was found and implemented for every conceivable everyday situation.
Five examples will give you an impression of the extremes which LotuTec® was subjected to before its market release. The aim of some of the situations to which it was exposed (not to be imitated!) was deliberate destruction.
The lenses are subjected to high temperatures for several hours at a time. LotuTec® passed this test with flying colours.
Lenses are subjected to high temperatures for a long period, e. g. when cooking.
A cotton cloth is rubbed with a defined force across the lens several times and in several cycles. LotuTec® displayed excellent resistance in this test.
Lenses are thoroughly and regularly cleaned for years – for more than 100 hours in all.
The lenses are exposed alternately to artificial sunlight, humidity and different temperatures. In the weathering test LotuTec® displayed outstanding qualities during its entire service life.
This test simulates the entire life cycle of a spectacle lens over a period of 200 hours – including all the influences climatic conditions can have on the lens.
The lenses are boiled in a defined salt water solution for some minutes in several cycles. LotuTec® displayed no signs of detachment during the entire test duration.
Resistance to perspiration is an important feature of spectacle lenses – particularly for sports enthusiasts.
A razor blade is used to make incisions in the base lens in a criss-cross pattern. Tape is then repeatedly adhered to and removed from the lens in various cycles. The lens is then examined for even the slightest signs of coating detachment. For LotuTec®, this test was absolutely no problem.