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
How can a lens collimate an image instead of just a point of light? The HUD collimates the light from each point in the source separately, producing a separate collimated bean from each point Unlike a collimator, these beams go in different directions It thus transforms the location of a point on the source into the direction from which the light enters the eye
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)
Can the neutrons in a nuclear reactor be collimated? That's very different from the intrinsically long optical cavity in something like a helium-neon laser, where the light which leaks out is already fairly well collimated, because nonparallel light has a low gain in the cavity If you like, you can think of the fissile material in a reactor as a "gain medium" which turns neutrons into more neutrons
electromagnetism - A difference between Plane Wave and Collimated . . . However, if the intensity differentials are accounted for than assuming a small plane wave or collimated vectors will produce an exact mathematically and experimentally verifiable result Thus, multiple texts and sources will unexpectedly state that the momentary wave at such a position is collimated or a plane-wave front
optics - Why cant incoherent light be collimated as well as laser . . . But this also makes the complete device a much larger light source, so collimation of the light it produces is considerably harder The lasers, on the other hand, are used directly as bare crystals behind the collimating lens, so they look much like point light sources, which can easily be collimated
electromagnetism - What is the difference between collimating . . . Attenuating has nothing to do with divergence or diffraction Collimating and waveguiding have nothing to do with scattering Unpolarized light basically means light with random polarization that isn't consistent from moment to moment It has nothing to do with whether the source is omnidirectional or highly collimated
Why do we need collimated light on a diffraction grating? If the beam wasn't collimated then light with different wavelengths but from different parts of the source, arriving at different incidence angles, would be diffracted in the same direction This would spoil your wavelength discrimination, contradicting the whole purpose of a diffraction grating
Min spot size for light collimated from an optical fiber? In that case, you will get a spot of minimal size, maximal intensity A larger (100 micron) fiber will definitely detract from beam quality and reduce the spatial coherence of the light, so that the beam cannot be well collimated nor focused to a spot much smaller than 100microns without throwing light away