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2. Spin casting (mirrors) - Wikipedia

   en.wikipedia.org/wiki/Spin_casting_(mirrors)

   Goble, L. W., et al. "Spincasting of a 3.5-m diameter f/1.75 mirror blank in borosilicate glass." Advances in Fabrication and Metrology for Optics and Large Optics. Vol. 966. International Society for Optics and Photonics, 1989. Hill, J. M., and J. R. P. Angel. "The Casting of the 6.5 m Borosilicate Mirror for the MMT Conversion.

3. List of largest optical reflecting telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_optical...

   This table does not include all the largest mirrors manufactured. The Steward Observatory Mirror Lab produced the 6.5 metre f/1.25 collimator used in the Large Optical Test and Integration Site of Lockheed Martin, used for vacuum optical testing of other telescopes. Segmented mirrors are also referred to as mosaic mirrors. Single mirrors are ...

4. Thirty Meter Telescope - Wikipedia

   en.wikipedia.org/wiki/Thirty_Meter_Telescope

   A 3.1-metre (10 ft) secondary mirror is to produce an unobstructed field-of-view of 20 arcminutes in diameter with a focal ratio of 15. A 3.5-by-2.5-meter (11.5 ft × 8.2 ft) flat tertiary mirror is to direct the light path to science instruments mounted on large Nasmyth platforms. [57] [58] The telescope is to have an alt-azimuth mount. [59]

5. Catadioptric system - Wikipedia

   en.wikipedia.org/wiki/Catadioptric_system

   Nikon (under the Mirror-Nikkor and later Reflex-Nikkor names) and Canon both offered several designs, such as 500 mm 1:8 and 1000 mm 1:11. Smaller companies such as Tamron , Samyang , Vivitar , and Opteka also offered several versions, with the three latter of these brands still actively producing a number of catadioptric lenses for use in ...

6. Police continue searching for child allegedly given away by ...

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   Federal Reserve's preferred inflation gauge shows price pressures eased last month. Food. Food. Southern Living. The 1 way to make a chewier cookie, according to a professional baker. Food.

7. File:Comparison optical telescope primary mirrors.svg

   en.wikipedia.org/wiki/File:Comparison_optical...

   10) Vera C. Rubin Observatory (formerly Large Synoptic Survey Telescope), 6.68 m effective (8.4‑m mirror, but with a big hole in the middle), planned 2025 11) Gemini Observatory, 8.1 m, 1999 and 2001 12) Subaru Telescope, 8.2 m, 1999; largest monolithic (i.e. non-segmented) mirror in an optical telescope from 1999 to 2005