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Spirograph is a geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids.The well-known toy version was developed by British engineer Denys Fisher and first sold in 1965.
A spherometer is an instrument used for the precise measurement of the radius of curvature of a curved surface. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens .
Visualization of the sagitta. In geometry, the sagitta (sometimes abbreviated as sag [1]) of a circular arc is the distance from the midpoint of the arc to the midpoint of its chord. [2]
Lens clock. A lens clock is a mechanical dial indicator that is used to measure the dioptric power of a lens.It is a specialized version of a spherometer.A lens clock measures the curvature of a surface, but gives the result as an optical power in diopters, assuming the lens is made of a material with a particular refractive index.
Now you should have a nice circle, with a solid black outline that is completely closed. If you have a Pac-Man shape or an arc, simply click the "make whole" button in the upper toolbar. Changing object fill colours using HSV sliders. Adding eyes. Now for the next step, create a smaller circle and then right click its outline (on Mac, use apple ...
Isometric video game graphics are graphics employed in video games and pixel art that utilize a parallel projection, but which angle the viewpoint to reveal facets of the environment that would otherwise not be visible from a top-down perspective or side view, thereby producing a three-dimensional effect.
Deep blue ray refers the radius of curvature and the red line segment is the sagitta of the curve (black).. In optics and especially telescope making, sagitta or sag is a measure of the glass removed to yield an optical curve.
Architectural drawing, Germany, 1902 Architectural drawing, Canada, 1936. The blueprint process is based on a photosensitive ferric compound. The best known is a process using ammonium ferric citrate and potassium ferricyanide. [6] [7] The paper is impregnated with a solution of ammonium ferric citrate and dried. When the paper is illuminated ...
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