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A Luneburg lens (original German Lüneburg lens) is a spherically symmetric gradient-index lens. A typical Luneburg lens's refractive index n decreases radially from the center to the outer surface. They can be made for use with electromagnetic radiation from visible light to radio waves . For certain index profiles, the lens will form perfect ...
In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...
The majority of hydrogen peroxide solutions are 3% hydrogen peroxide. [1] This enables the solution to break down any proteins that coat the contacts after a long period of use. Hydrogen peroxide is always used alongside a neutralizing product. [2] The intention is to prevent the hydrogen peroxide from contact with the eye, which could damage ...
ReNu is a brand of soft contact lens care products produced by Bausch & Lomb. [1] By far the most popular brand of lens solutions until 2006, ReNu has rebranded its formulations as renu sensitive (formerly ReNu Multi-Purpose) and renu fresh (formerly ReNu MultiPlus), the latter containing a patented ingredient called hydranate, known by chemists as hydroxyalkylphosphonate, that removes protein ...
Lensman (1984 film) Lensman: Secret of the Lens (SF新世紀レンズマン, SF Shinseiki Renzuman) is a 1984 Japanese animated film based on the Lensman novels. The movie is a loose adaptation of the series. It was dubbed by Harmony Gold in 1988. This was re-dubbed by Streamline Pictures in 1990 with most of the same voice actors.
History of optics. Modern ophthalmic lens making machine. Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term ...
Google Nest – smart home products including smart speakers, smart displays, digital media players, smart doorbells, smart thermostats, smoke detectors, and wireless routers. Google Chromecast – digital media players. Fitbit – activity trackers and smartwatches. Stadia Controller – game controller for Stadia.
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