Collimator
Videos
A collimator is a device which narrows a beam of particles or waves. “To narrow” can mean either to cause the directions of motion to become more aligned in a specific direction, or to cause the spati
Collimators used to record gamma rays and neutrons from a nuclear test.
Collimator for a neutron stream, University of Washington cyclotron
Reflector sight
Videos
A reflector sight or reflex sight is an optical sight that allows the user to look through a partially reflecting glass element and see an aiming point or some image superimposed on the field of view.
Collimator
…eye to partially see the sight and target at the same time. Adding a beam splitter allows the viewer to see the reticle and the field of view, making a reflector sight. Collimators may be used with laser diodes and CO2 cutting lasers. Proper collimation of a laser source with long enough coherence length can be verified…
Prototype of the Grubb reflector sight attached to a rifle
German paratrooper looks through the reflector sight of the Flakvisier 40 gunsight on a FlaK 38 anti-aircraft gun (1944), one of the more sophisticated sights at the time
Longitudinal cross-section of a basic reflector sight for pre-WWII German fighter planes (1937 German Revi C12/A)
HUD inside the cockpit of a fighter jet