Search results
Results from the WOW.Com Content Network
The primary innovation Celestron/Tom Johnson devised was a method to produce Schmidt corrector plates using a vacuum to pull the glass blanks into a pre-shaped curve mold called a "master block" during the polishing process. [8] [9] This allowed for inexpensive mass production of corrector plates of uniform shape.
Synta Technology Corporation was founded in Taoyuan, Taiwan around 1980 by mechanical and optical designer Dazhong Shen, (a/k/a David Shen). In 1992 Synta, along with Canadian investors, established the Suzhou Synta Optical Technology Co., Ltd in Suzhou (Jiangsu), China (outside Shanghai) as a manufacturing facility producing telescopes for Celestron and Tasco.
Optical manufacturing and testing. Optical manufacturing and testing is the process of manufacturing and testing optical components. It spans a wide range of manufacturing procedures and optical test configurations. The manufacture of a conventional spherical lens typically begins with the generation of the optic's rough shape by grinding a ...
Astroscan. An Astroscan wide-field Newtonian reflector. The Astroscan was a wide-field 4⅛" clear-inch (105mm) diameter reflecting telescope, originally produced by the Edmund Scientific Corporation, that was for sale from 1976 to 2013.
Magnetorheological finishing. Magnetorheological finishing (MRF) is a precision surface finishing technology. Optical surfaces are polished in a computer -controlled magnetorheological (MR) finishing slurry. Unlike conventional rigid lap polishing, the MR fluid's shape and stiffness can be magnetically manipulated and controlled in real time.
The Schmidt–Cassegrain design is very popular with consumer telescope manufacturers because it combines easy-to-manufacture spherical optical surfaces to create an instrument with the long focal length of a refracting telescope with the lower cost per aperture of a reflecting telescope. The compact design makes it very portable for its given ...
The design of photographic lenses for use in still or cine cameras is intended to produce a lens that yields the most acceptable rendition of the subject being photographed within a range of constraints that include cost, weight and materials. For many other optical devices such as telescopes, microscopes and theodolites where the visual image ...
Optical lens design is the process of designing a lens to meet a set of performance requirements and constraints, including cost and manufacturing limitations. Parameters include surface profile types (spherical, aspheric, holographic, diffractive, etc.), as well as radius of curvature, distance to the next surface, material type and optionally tilt and decenter.