![]() This is also caused by the anti-reflective coating but when circle-like structures are visible on the lens surface the layer thickness is off-target. ![]() Why Do I See Rainbow Circles on My Glasses?ĭespite the classic blue and green reflections on the lens surface some people are faced with rainbow circles on their glasses. Both pictures were done in the same lighting condition with the same frame to see the differences best. The one with the brighter green on the left side worked not so well driving at night and produced nagging reflections on the back surface. In the picture below you can see me wearing two different pairs of glasses with different reflections on them. Increasing the number of layers in a stack to theoretically improve its spectral performances may result in poorer performance than expected from simpler designs because thickness variations can change this entire system’s output significantly. The design of an efficient antireflection coating is very complex and delicate. depending on what is fine-tuned the color on your lens surface will change. In seldom cases, you will find yellow, gold, or red glare on your anti-reflective coating. They are just even a little less visible compared to the blue ones. Personally, I like the coatings with the dark green reflections best. This is actually not common.īut usually, you will find more reflections on your glasses with cheaper lenses. Here you can see a good example of an anti-reflective coating on top with minimal blue reflections and a coating below in the glasses which produces even a combination of blue and green glare. Just have a closer look at the image below. Most manufacturers have their coatings on a great level but there are also differences in the quality of the coatings. When this antireflective coating works best the blue or green reflections on the lenses are reduced to a minimum is currently at approximately 1% reflection on the lens surface. ![]() When some reflection is remaining on the lens surface of your glasses the manufacturer usually decides for a dark green or blue because those reflections are less noticeable to the wearer and to someone looking at your eyes. The engineer needs to produce layers that have different thicknesses designed to produce interference in combination with a certain wavelength.Īs you can imagine the multiple layers on the lens surface can not be matched perfectly to every visible wavelength. Every layer reflects some portion of the light spectrum as seen below which causes interferences and therefore a reduction of glare on the lens surface.ĭue to the multiple wavelengths in the visible light spectrum, the coating needs to be fine-tuned to reduce most of the glare. ![]() What Causes the Blue and Green Reflections on the Glasses Actually?Īnti-reflective coatings consist out of different layers on top of each other. This can be very disturbing and can be minimized with a really good anti-reflective coating as well even not more with smaller glasses. When you wear big glasses and the lighting around you is very unfavorable you might even see objects around you in the blue or green color of the reflection on your glasses. The more lens surface you have in front of your eyes the more reflections are theoretically possible. In the end, it is worth noting that people wearing oversized glasses will notice reflections more than people with smaller glasses. The engineer of the anti-reflective coating needs to decide whether to choose blue, green, or even another color of the remaining reflections on the lenses. When anti-reflective coatings are engineered it is currently not possible to block out all the light. Depending on the angle someone standing in front of you your eyes could be covered by the blue or green reflections depending on the light sources around you. Usually, those effects are blue and green mirror effects on the lens surface of your glasses are rarely noticeable for you. Usually, those reflections are easily visible to you when you hold your glasses in your hands and turn them around a little so a light source can like a lamp gets mirrored on the lens surface. The better the quality of the anti-reflective coating is the fewer reflections you can notice wearing the lenses. Depending on the manufacturer the color will be more tuned to a dark green or a dark blue. This colored reflection is also known as the bloom. The green or blue reflection on your glasses is the color of the remaining 1% reflection on the lenses of your glasses the anti-reflective coating could not eliminate.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |