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Minerals of a single element are called Native elements. These include gold, silver, copper, etc. They can be divided into three groups such as metals, semi-metals, and nonmetals.

Objective Lens for Optical Pick-Up

ActiveUS20080180815A1Convenient coatingEasy to measureOptical beam guiding meansRecord information storageSingle elementNumerical aperture

There is provided an objective lens for an optical pick-up. The objective lens is formed to be a single-element plastic lens having a first surface and a second surface. The first surface is configured to have, within an effective diameter, an inflection point at which a second derivative of a sag of the first surface takes a value of 0. Further, the objective lens having a numerical aperture larger than or equal to 0.75.

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Owner:KONICA MINOLTA INC

1 results about "Single element" patented technology

Objective Lens for Optical Pick-Up

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