Noun:

Dittaptar,

dioptric's Usage Examples:

The lighthouse had been provided with a second-order catadioptric lens array by Henry Lepaute of Paris; it showed a fixed red light with a white sector indicating an anchorage to the north-east (later the colours were reversed).

Among many other more mainstream products they have created two unusual varieties of catadioptric telescopes with an open tube design instead of the full-aperture corrector plate of the Schmidt–Cassegrain and most Maksutov–Cassegrain designs.

that uses a lens as its objective to form an image (also referred to a dioptric telescope).

catoptrophobia, cyclops, diopter, dioptre, dioptrics, diplopia, eisoptrophobia, emmetropia, hemianopsia, myopia, opsoclonus, optic, optokinetic, panopticon, pleoptics.

Since 1854 a second white light has also been displayed, from a window lower down in the tower, indicating a channel between two hazards: the Draystone and the Knap; it used a small, sixth-order dioptric lens.

In 1757 John Dollond was able to create an achromatised dioptric, which was the forerunner of the lenses used in all popular.

(catoptrics) and lens-systems (dioptrics), although in the late twentieth century, optical fiber was introduced.

The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon.

Diopter may also refer to: Historically, a dioptric lens Any lens system, such as a telescope A diopter sight A close-up lens.

range of the light house was extended to 22 nautical miles when 3rd order dioptric flashing lights were installed.

This particular design is also unusual in that it is a Cassegrain design but has a fixed primary and refractor-style rack-and-pinion focuser which removes the image shift issues seen with other catadioptric designs.

That is, this work is not a geometric discussion of catoptrics or dioptrics, the traditional subjects of reflection of light by mirrors.

1st order bivalve dioptric Fresnel lens.