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2. The 14 Best Lighted Makeup Mirrors That Are Worth Every Penny

   www.aol.com/14-best-lighted-makeup-mirrors...

   Anatolians would most likely gaze in astonishment at modern mirrors, particularly those of the light-up variety. Mirrors produced even 10 years ago hardly hold a candle to the 2021 versions, in ...

3. A magnifying mirror is a travel must-have for anyone over the ...

   www.aol.com/lifestyle/a-magnifying-mirror-is-a...

   The non-magnified side has eight small LED lights, ideal for doing your makeup or diffusing the light while using the 3x magnification side. To use the LEDs, just flip a switch in the back and you ...

4. Micralign - Wikipedia

   en.wikipedia.org/wiki/Micralign

   New mirrors reflected the light through right angles so vertical motion of the holder was translated into horizontal scanning over the main mirror, and a roof prism flipped the final image so that the mask and wafer did not produce mirror images. By making the C-shaped holder large enough, rotating the assembly produced a facsimile of ...

5. Foucault knife-edge test - Wikipedia

   en.wikipedia.org/wiki/Foucault_knife-edge_test

   Foucault test setup to measure a mirror. The Foucault knife-edge test is an optical test to accurately measure the shape of concave curved mirrors. It is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes. It uses a relatively simple, inexpensive apparatus compared to other testing techniques.

6. Telescope - Wikipedia

   en.wikipedia.org/wiki/Telescope

   A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. [1] Originally, it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word "telescope" is defined as a wide range of ...

7. Hartmann mask - Wikipedia

   en.wikipedia.org/wiki/Hartmann_mask

   The Hartmann mask is a simple opaque mask containing two or three holes. (This device is called a Hartmann mask if it has multiple holes, or a Scheiner disk if it has two holes. [ 2]) The mask covers the aperture of the telescope. When the apparatus is out of focus, multiple images can be seen if the telescope is pointed towards a bright light ...