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The technique is essentially using the illuminated part of the reticle and its focusing rear eyepiece as a collimator sight. [15] As in any other collimator sight, the user does not actually look through the sight but instead keeps the collimated (infinity) image of the illuminated part of the reticle in focus with the dominant eye while the ...
A reticle that is too bright will cause glare in the operator's eye, interfering with their ability to see in low-light conditions. This is because the pupil of the human eye closes quickly upon receiving any source of light. Most illuminated reticles provide adjustable brightness settings to adjust the reticle precisely to the ambient light.
A reticle, or reticule [1] [2] also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections.
These videos are also available Wikiversity, Youtube and Archive.org. A Lensmeter in an Optical shop A simple lensmeter cross sectional view. 1 – Adjustable eyepiece 2 – Reticle 3 – Objective lens 4 – Keplerian telescope 5 – Lens holder 6 – Unknown lens 7 – Standard lens 8 – Illuminated target 9 – Light source 10 – Collimator
A C79 Optical Sight. The C79 optical sight (SpecterOS3.4x) is a telescopic sight manufactured by Elcan.A variant, the M145 Machine Gun Optic is in use by the US military. It is 3.4×28, meaning 3.4x magnification, and a 28mm diameter objective lens.
The AN/PAS-13B comes in two variants, the medium AN/PAS-13B(V)1 and the heavy AN/PAS-13B(V)2. The medium has a smaller telescope attached, resulting in a zoom of 5x compared to the heavy's 10x. Both AN/PAS-13Bs have programmable reticles, allowing the user to match the reticle to the weapon system the sight will be mounted on.
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