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2. List of soft contact lens materials - Wikipedia

   en.wikipedia.org/wiki/List_of_soft_contact_lens...

   The US Food and Drug Administration (FDA) defines soft contact lenses as: made of soft, flexible plastics that allow oxygen to pass through to the cornea. Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses. Newer soft lens materials include silicone-hydrogels to provide more oxygen to your ...

3. Telescopic sight - Wikipedia

   en.wikipedia.org/wiki/Telescopic_sight

   A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. [1] It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim.

4. Ray transfer matrix analysis - Wikipedia

   en.wikipedia.org/wiki/Ray_transfer_matrix_analysis

   where f is the focal length of the lens. To describe combinations of optical components, ray transfer matrices may be multiplied together to obtain an overall RTM for the compound optical system. For the example of free space of length d followed by a lens of focal length f:

5. 1951 USAF resolution test chart - Wikipedia

   en.wikipedia.org/wiki/1951_USAF_resolution_test...

   A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...

6. List of ray tracing software - Wikipedia

   en.wikipedia.org/wiki/List_of_ray_tracing_software

   List of ray tracing software. Ray tracing is a technique that can generate near photo-realistic computer images. A wide range of free software and commercial software is available for producing these images. This article lists notable ray-tracing software. Software.

7. WestJet cancels hundreds of flights after aircraft mechanics ...

   www.aol.com/westjet-cancels-hundreds-flights...

   Eva Rothenberg, CNN. June 30, 2024 at 1:39 PM. Chris Helgren/Reuters. Labor negotiations between WestJet, Canada’s second-largest airline, and the Aircraft Mechanics Fraternal Association remain ...