How can a lens collimate an image instead of just a point of light? 1 A lens cannot collimate an image It can take the light from each point of the image into a collimated beam in a different direction Your eye can take a collimated beam and focus it to a point on your retina It can take beams in different directions and focus each to a different point, thus reconstructing the image Edit - A ray diagram
What is the best way to collimate light emitted by a LED? 9 One cannot collimate light from an LED accurately without loosing a great deal of light and or being happy with a very wide collimated beam, because the source is often quite a wide extended source (sometimes up to 1mm across)
optics - Why cant incoherent light be collimated as well as laser . . . While you can collimate an LED, the fact remains that the because the LED has a much (much) larger angular spread than a laser, you just can't collimate it nearly as well So, perhaps you can get an LED down to a few degrees, but the laser will be in tenths of a degree That means the laser can go across a (big) room and still make a small dot on the screen
optics - Collimated lens for a ir led - Physics Stack Exchange I've read, read and read but found no answer to my interrogations I want to collimate a 3mm IR LED 890 nm (I can use many LED angles) and I have no idea how to calculate the distance of the lens o
Lasers and Collimation - Physics Stack Exchange If lasers are collimated, what causes them to decollimate? Their production system seems to suggest a completely linear, collimated light source, but they do spread out over large distances The same
optics - Does an aspheric lens require that the incident light be . . . Aspheric lenses are able to either collimate or focus light, depending on the side of the lens the light is incident In diagrams that show the aspheric lens focusing light, the incident light rays always look to be collimated
Min spot size for light collimated from an optical fiber? The easiest way to do that is probably collimate the output from the fiber, then use a 2nd lens to focus it onto the target But the diameter of the collimated beam is not particularly relevant to the size of the final focused spot
How to multiplex several light sources into one optical path? I'd like to design a device that takes 4 channels of light from sets of LEDs and multiplexes them into one optical path, which finally creates a rectangle pattern of light that is approximately 30m
Is it possible to collimate a point source of concentrated light? The picture is misleading because it is not to scale (obviously), but the relationships still apply in any imaging situation You can collimate the light from the image of the sun - but because the image that you made has a finite extent, the collimated beam formed will have some angular spread - it will not be "perfectly" collimated