enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Optical lens design - Wikipedia

   en.wikipedia.org/wiki/Optical_lens_design

   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.

3. Pupillary distance - Wikipedia

   en.wikipedia.org/wiki/Pupillary_distance

   Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. [2] Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance. [3]

4. Cooke triplet - Wikipedia

   en.wikipedia.org/wiki/Cooke_triplet

   The Cooke triplet is a photographic lens designed and patented in 1893 by Dennis Taylor who was employed as chief engineer by T. Cooke & Sons of York. It was the first lens system that allowed the elimination of most of the optical distortion or aberration at the outer edge of the image.

5. Schneider Kreuznach - Wikipedia

   en.wikipedia.org/wiki/Schneider_Kreuznach

   The C-Claron, or Copy-Claron, is a family of lenses designed for 1:1 reproduction. The f/4.5 lenses are 4 elements in 3 or 4 groups, the f/5.6 are a 6/4 design, and the f/8 is 8/4. All were supplied from the factory in barrel mount. The following Claron lens has these markings on the beauty ring Cy Ξ Claron 1:1,8/50 1:1,6 50mm 1:1,8 1:1,6 ...

6. Field flattener lens - Wikipedia

   en.wikipedia.org/wiki/Field_Flattener_Lens

   The object in designing a field flattening lens is to create a lens that shifts the focal points of the Petzval surface to lie in the same plane.

7. Optical manufacturing and testing - Wikipedia

   en.wikipedia.org/wiki/Optical_manufacturing_and...

   Direct surface surveying (no intervening optics, for example Foucault knife-edge test, Ronchi test, Caustic test) Auxiliary optics (null correctors, computer-generated holograms, etc.) Interferometric testing; The Fizeau interferometer is the standard type of interferometer that is used in optical fabrication. [12]