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The Telrad, a reflector sight for astronomical telescopes introduced in the late 1970s. Reflector sights have been used over the years in nautical navigation devices and surveying equipment. Albada type sights were used on early large format cameras, "Point and shoot" type cameras, and on simple disposable cameras. [30]
The Ferranti Gyro Sight Mk IIc. Production of the Mark I was postponed and work started on an improved sight. Changes involved incorporating the gyro adjusted reticle into a more standard reflector sight system, a non magnifying optical sight that had been in use since 1918. [4]
Reflector sights were first used as a weapon sight in German aircraft towards the end of World War I. Over the years they became more sophisticated, adding lead computing gyroscopes and electronics (the World War II Gyro gunsight ) [ 8 ] radar range finding and other flight information in the 1950s and 1960s, eventually becoming the modern head ...
A red dot sight is a common classification [1] for a non-magnifying reflector (or reflex) sight that provides an illuminated red dot to the user as a point of aim. A standard design uses a red light-emitting diode (LED) at the focus of collimating optics , which generates a dot-style illuminated reticle that stays in alignment with the firearm ...
The reflector gun sight patents were later assigned to Barr and Stroud and used in the guns sights they supplied to the RAF during World War II including the GM2 reflector fixed sights used in fighters from 1938 and the Mk III reflector free sights used in bombers and adopted by the US Navy as the Mark 9.
Telescopic sights are used with all types of systems that require magnification in addition to reliable visual aiming, as opposed to non-magnifying iron sights, reflector (reflex) sights, holographic sights or laser sights, and are most commonly found on long-barrel firearms, particularly rifles, usually via a scope mount.
In 1900, Grubb invented the reflector or "reflex" sight, [5] [6] a non-magnifying optical sight that uses a collimator to allow the viewer looking through the sight to see an illuminated image of a reticle or other pattern in front of them that stays in alignment with the device the sight is attached to (parallax free).
An optical reflector sight replaced the iron sights beginning in September 1944. [24] The M9A1 supplanted the M9 in production beginning in June 1944. It has an improved coupling mechanism for the launch tube; the overall length is 61.1 in (1.55 m) and 31.5 in (800 mm) when folded.