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2. Borescope - Wikipedia

   en.wikipedia.org/wiki/Borescope

   Schematic view of a rigid borescope Borescope in use, showing typical view through the device. A borescope (occasionally called a boroscope, though this spelling is nonstandard) is an optical instrument designed to assist visual inspection of narrow, difficult-to-reach cavities, consisting of a rigid or flexible tube with an eyepiece or display on one end, an objective lens or camera on the ...

3. Fiberscope - Wikipedia

   en.wikipedia.org/wiki/Fiberscope

   Articulation system – The ability of the user to control the movement of the bending section of the fiberscope that is directly attached to the distal lens. Fiberscope body – The control section that is designed to help aide one hand operation. Insertion tube – Most of the length of the fiberscope, made to be durable and flexible.

4. Fisheye lens - Wikipedia

   en.wikipedia.org/wiki/Fisheye_lens

   In a circular fisheye lens, the image circle is inscribed in the film or sensor area; in a diagonal ("full-frame") fisheye lens, the image circle is circumscribed around the film or sensor area. This implies that using a fisheye lens for a different format than it was intended for is easy (as opposed to a rectilinear lens), and may change its ...

5. Endoscope - Wikipedia

   en.wikipedia.org/wiki/Endoscope

   A lens system that transmits the image from the objective lens to the observer, usually a relay lens system in the case of a rigid endoscope or a bundle of optical fibers in the case of a fiberoptic endoscope. An eyepiece which transmits the image to the screen in order to capture it. However, modern videoscopes require no eyepiece.

6. Videoscope - Wikipedia

   en.wikipedia.org/wiki/Videoscope

   Videoscope (testing equipment), an alternative name for the video borescope. Videoscope (film distributor) , Australian distributor of Dimboola and other films. The Phantom of the Movies' Videoscope , a US movie magazine released between 1993 and 2020.

7. 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 ...