A source, like the sun, which is very far away, provides collimated light.

Collimated light is sometimes said to be focused at infinity.

Some people say that collimated light is focused at infinity.

Really, collimated light will disperse a little as it travels over distance.

The light from this type of wave is referred to as collimated light.

Many types of lenses can also produce collimated light from point-like sources.

In theory, collimated light does not disperse with distance.

But since these sights use parallel collimated light this is only true when the target is at infinity.

The recorded hologram is illuminated by the collimated light of a laser diode built into the sight.

Collimated light is light whose rays are parallel, and therefore will spread slowly as it propagates.

Conversely, a point source at the focus of a parabolic mirror will produce a beam of collimated light.

The reflector options are parabolic (for collimated light) or elliptical (for focused light).

In the laboratory, it is possible to observe higher-order rainbows by using extremely bright and well collimated light produced by lasers.

Spherical mirrors are easier to make than parabolic mirrors and they are often used to produce approximately collimated light.

Like the reflector sight, the holographic sight's reticle uses collimated light and therefore has an aim-point that can move with eye position.

A refracting telescope commonly used is the Galilean telescope which can function as a simple beam expander for collimated light.

The projected collimated light is back reflected by a mirror, or other high-quality reflective surface, and is captured by the objective lens.

Laser diodes emit less collimated light due to their short cavity, and therefore higher collimation requires a collimating lens.

The collimated reticle image can also be seen at any eye position in the cylindrical volume of collimated light created by the sight behind the optical window.

If one were to view that geometry as a 3D reflective surface under collimated light, one would observe glint motion that is consistent with horizontal parallax.

In schlieren photography, the collimated light is focused with a lens, and a knife-edge is placed at the focal point, positioned to block about half the light.

Collimated light from a laser source is most often used, in which case the technique can be referred to as multiangle laser light scattering (MALLS).

Sometimes it was hard to remember that there was really nothing there, nothing but a few interference patterns of collimated light, backed up by some tons of metal and plastic.

In a practical monochromator, however, the light source is close by, and an optical system in the monochromator converts the diverging light of the source to collimated light.