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2. Window (optics) - Wikipedia

   en.wikipedia.org/wiki/Window_(optics)

   A flatness test of a float-glass optical window on top of a λ/10 optical flat. The window measures a flatness of 4–6 λ per inch. The window measures a flatness of 4–6 λ per inch. In optics , a window is an optical element that is transparent to a range of wavelengths , and that has no optical power .

3. Shading coefficient - Wikipedia

   en.wikipedia.org/wiki/Shading_coefficient

   Shading coefficient (SC) is a measure of thermal performance of a glass unit (panel or window) in a building. It is the ratio of solar gain (due to direct sunlight) passing through a glass unit to the solar energy which passes through 3mm Clear Float Glass. [ 1 ]

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5. Transparency meter - Wikipedia

   en.wikipedia.org/wiki/Transparency_meter

   A transparency meter, also called a clarity meter, is an instrument used to measure the transparency of an object. Transparency refers to the optical distinctness with which an object can be seen when viewed through plastic film/sheet, glass, etc. In the manufacture of sheeting/film, or glass the quantitative assessment of transparency is just ...

6. List of EN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_EN_standards

   Testing and measurement techniques. Overview of IEC 61000-4 series; EN 61000-4-2: Electromagnetic compatibility (EMC). Testing and measurement techniques. Electrostatic discharge immunity test. Basic EMC publication; EN 61000-4-3: Electromagnetic compatibility (EMC). Testing and measurement techniques.

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