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2. Precision glass moulding - Wikipedia

   en.wikipedia.org/wiki/Precision_glass_moulding

   Precision glass moulding: In this step the preform is directly formed into an optical glass lens. It is necessary to clean the glass preform and the mould before starting the process, but there is no polishing or post-machining required. Lens coating: An antireflection coating is applied to the finished lenses. The lenses are first cleaned, and ...

3. Microfilm reader - Wikipedia

   en.wikipedia.org/wiki/Microfilm_reader

   This new reader consisted of "cementing a thick glass plate to each end of a small block of optical glass. The entire assembly was then placed in a grinding jig which transformed the flat end-plates into convex lenses, each focused on the image borne by the opposite plate. The end result was a cylinder of glass whose rounded ends acted as ...

4. Optical glass - Wikipedia

   en.wikipedia.org/wiki/Optical_glass

   Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...

5. List of lens designs - Wikipedia

   en.wikipedia.org/wiki/List_of_lens_designs

   This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...

6. Category:Lenses - Wikipedia

   en.wikipedia.org/wiki/Category:Lenses

   A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple elements allows more optical aberrations to be corrected than is possible with a single element. Manufactured lenses are made of glass or transparent plastic. Elements which refract electromagnetic radiation outside the visual spectrum are also ...

7. Trump aims to deport all immigrants in the US illegally - AOL

   www.aol.com/news/trump-says-aims-deport...

   By Ted Hesson. WASHINGTON (Reuters) -U.S. President-elect Donald Trump aims to deport all immigrants in the U.S. illegally over his four-year term but wants a deal to protect so-called "Dreamer ...

8. Stassi Schroeder's Daughter, 3, Accidentally Stabs Mom with ...

   www.aol.com/stassi-schroeders-daughter-3...

   Stassi Schroeder's daughter Hartford is dangerously obsessed with Wicked.. On Thursday, Dec. 27, the Vanderpump Rules alum's husband, Beau Clark, shared a hilarious video on Instagram of Schroeder ...

9. Optical printer - Wikipedia

   en.wikipedia.org/wiki/Optical_printer

   A 35 mm optical printer with two projector heads, used in producing movie special effects. Starting from the left, light is shining from the lamp house, then at A is the first projector's film gate, at B a lens that projects the film in A onto the second projector's gate C.