Recent content by Antonij

Hi I want to make a infrared nonimaging concentrator, but since crystals needed for lenses are difficult to work with for an amateur, want to use liquids. I am interested in the 1-12 micron spectrum; what liquids could i use?

I want to make my own glass fiber ceramic matrix composite. I could just buy glass filament, but i want it to be a form of primitive technology, that is something you could make by yourself with materials found in nature. I already learned how to purify sand into very pure silica with KOH from...

Your picture is accurate to what i was asking about, except there is a smooth transition between high and low index, not an interface. I know that for a sufficiently "slow changing" gradient this is possible. The question is if there's a limit to how "fast changing" gradient can be so that it...

A ray is coming at a grazing angle (above critical angle) from the optically denser material through the gradient. Will the ray be bent perpendicularily from the normal, traveling in straight line perpendicular to the normal no mayter how steep is the gradient?

Is there a limit to how steep a refractive index gradient can be before ray optics are no longer able to predict the path of the light? How is it related to wavelength? Under what conditions the light will be able to travel perpendicular to the gradient In a straight line? (having diffrent index...