concave lens उदाहरण वाक्य

Looking at my face in the mirror, I was always aware of their presence, the way my eyes were hidden behind them, the way the concave lenses warped my face.
This eyepiece is one of the more expensive to manufacture because of the quality of glass, and the need for well matched convex and concave lenses to prevent internal reflections.
The STF lens features an optical apodization filter in form of a neutral-gray tinted concave lens element near the lens'circles of confusion in such a way as to become truly Gaussian.
The concave lenses of some of these iron ore mirrors are able to project " camera lucida " images onto a flat surface and can also be used to light fires.
The appearance is similar to a single-arch dam but with a distinct vertical curvature to it as well lending it the vague appearance of a concave lens as viewed from downstream.

The last step, regarded as most important by Brewster, was to place the reflecting panes in a draw tube with a concave lens to distinctly introduce surrounding objects into the reflected pattern.
Lenses to correct this common condition are thinner in the centre than on the edges to help redirect light rays to the retina, and are called " minus " or concave lenses.
For a double concave lens where the rays are diverged, the principal focal length is the distance at which the back-projected rays would come together and it is given a negative sign.
For his optics work, extremely limited equipment sufficed : a few panes of glass, convex and concave lenses, mirrors, prisms, paper and cardboard, pigments, candles and the means to measure distances and angles.
But, when I use that term, the light that has been reflected off of an object through a concave lens can appear on say a piece of tin foil or a piece of paper.