lens blanks
1Optical lens design — refers to the calculation of lens construction parameters (variables) that will meet a set of performance requirements and constraints, including cost and schedule limitations. Construction parameters include surface profile types (spherical,… …
2Fresnel lens — Optics. a large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc. [1840 50; see FRESNEL] * * * Series of concentric rings, each consisting of a thin part of a simple lens …
3Great Paris Exhibition Telescope of 1900 — The Great Paris Exhibition Telescope of 1900, with an objective lens of 1.25 m (49.2 inches) in diameter, was the largest refracting telescope ever constructed. It was built as the centerpiece of the Paris Universal Exhibition of 1900. Its… …
4Harvey Littleton — Infobox Person name = Harvey K. Littleton caption = birth date = June 14, 1922 birth place = death date = death place = other names = known for = Founder, American studio glass movement occupation = Artist, educator nationality = U.S.… …
5ophthalmic glass — n glass similar to optical glass but annealed in rolled sheets and used primarily for spectacle lens blanks …
6cylinder man — noun 1. : a worker who cures bricks and cinder blocks in steam pressure cylinders to hasten hardening 2. : an optical glass worker who grinds cylinder shaped lens blanks …
7ophthalmic glass — noun : glass similar to optical glass but annealed in rolled sheets and used primarily for spectacle lens blanks …
8clocker — I. ˈkläkə(r) noun ( s) Etymology: clock (II) + er 1. : one that times racehorses during workouts and records information that will be useful in grouping and handicapping the horses 2. : one that times a race or measures a flow (as of traf …
9Medical prescription — ℞ redirects here. For other uses of Rx, see Rx. A prescription (℞) is a health care program implemented by a physician or other medical practitioner in the form of instructions that govern the plan of care for an individual patient.[1]… …
10photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
