The full width at half maximum (FWHM) is a measure used in various fields, particularly in spectroscopy, signal processing, and imaging, to characterize the ...

Jul 15, 2009 — I have seen many spotting scopes use reflecting mirrors, so I am surprised I never see mirror based rifle scopes. ... scope (small mirror) ...

Easily convert your laser wavelength to frequency and laser frequency to wavelength with this free online calculator.

Anti-reflective lenses are designed to minimize distracting reflections and glare on the surface of the lens to improve vision and comfort.

No more worries when walking in the rain! C Shield's hydrophobic lens coating means water droplets won’t stick to your lenses.

Easily wipe your lenses free of dust and lint. C Shield reduces static electricity buildup on the lens surface, decreasing dust accumulation.

Add to any frames, with or without prescription. Compatible with single vision, Standard Progressives, and Premium Progressives.

• Look great with no unattractive or distracting glare on lens surface• More visual comfort in all lighting conditions for clearer, safer vision

A parallel plate in converging beam space adds abberations proportional to its thickness. Your compensating optic(s) , for "as good" imaging ...

What does MTF stand for? ; MTF, Male to Female (transgender) ; MTF, Military Treatment Facility ; MTF, More to Follow.

The "First Order Fresnel Lens" is the largest lens commonly installed in the large "seacoast lights". Two larger sizes (hyper-radial and meso-radial) have been ...

Having an anti-reflective coating minimizes reflection and glare, reducing eye strain and allowing for clearer and more comfortable vision. It’s especially helpful in highly reflective conditions such as driving at night. Anti-reflective coating also reduces reflection on the surface of your lens, so people who are looking at you can see your eyes more clearly. Lenses without anti-reflective coating can create distracting and unattractive reflections.

Anti-reflective coating eliminates ghost images as well as reduces eye-fatigue from fluorescent lighting and driving at night.

10 votes, 13 comments. So I currently use one of these to connect a USB midi controller (Keystep) to an iPad Air (lightning)…

Adding an anti-glare coating after you've already purchased your glasses is not recommended for the following reasons: It could cost more and affect quality: Since the coating application technology requires a coating to be added at the time that the lens is cut, it could cost more to apply it after purchase and you may not get the same quality. Your lenses are not factory “fresh” anymore: Once your lenses have been exposed to skin oils, the coating may not stick well, which could defeat its effectiveness and longevity. Scratches on lenses could be magnified: If there’s a scratch, applying the coating will magnify it.

While most lens manufacturers offer anti-reflective coatings, the performance and durability vary.  Top performers in coatings change their composition slightly for each type of lens material that they’re applied to — this is called “index matching”. It increases a stronger bond and better durability under harsh temperature conditions. Our premium C Shield coating is index-matched to the specific lens material you choose.

•Unattractive reflection on the surface of the lens​•Irritating glare causes reduced vision clarity and eye strain, making it difficult to see in some conditions

It listed more than 400 classical Fresnel lighthouse lenses in the United States, and two pre-Fresnel, Winslow Lewis lenses.

There’s no way to make lenses completely scratch-proof. Scratch-resistant coating will help to strengthen the surface of your lenses and improve durability, so they’re less likely to get scratched or damaged if you accidentally drop them or rub them against an abrasive material.  Adopting smart care habits is the best way to maintain the quality of your lenses. Store them in a cushioned case when you're not wearing them. When cleaning them, use a microfibre cloth (never paper towel, your t-shirt, or any other type of rough fabric) and lens cleaning solution or mild dish detergent.

May 28, 2020 — Lasers are one of the most widely used tools in manufacturing and can create fine features that are difficult or impossible to make using ...

Sep 23, 2019 — What you have is a Misaligned Die Strike. It caused one side of the rim to rise due to a Higher than normal pressure strike because of the ...

From anti-reflective lenses, which reduce glare, to C Shield, which protects your lenses from daily wear and tear, lens coatings can enhance your vision, extend the life of your lenses, and provide added comfort.

A six-in-one lens coating solution. These factors work together to keep your glasses cleaner, stronger, and smarter – so you can focus on all the things in front of you.