Earth technology in Stargate

In the Stargate fictional universe, the humans of Earth have developed many advanced technologies based on what SG teams have brought back from trips to other planets through the Stargate. Earth has also benefitted from technical knowledge provided by friendly alien races, such as the Asgard and the Tok'ra.

Real or semi-real technology

The producers of Stargate SG-1 and Stargate Atlantis collaborated closely with the United States Air Force. The USAF is portrayed in a positive light in the series; as a result the franchise received access to USAF weaponry and fighter jets. The Oregon Air National Guard 173rd FW from Kingsley Field in Klamath Falls, OR provided F-15 fighter jets for the movie Stargate: Continuum. The FN P90 was the favoured weapon of SG-1, and replaced the Heckler & Koch MP5 that was used until season 4 of Stargate SG-1. The P90 is also used by teams on Stargate Atlantis. In seasons 9 and 10 of SG1, the teams can be seen using other firearms, including the G36 and MP7. All personnel appear to be issued the Beretta 92, which they used throughout the series.

Diaphragm (optics)

In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture. Thus it is also called a stop (an aperture stop, if it limits the brightness of light reaching the focal plane, or a field stop or flare stop for other uses of diaphragms in lenses). The diaphragm is placed in the light path of a lens or objective, and the size of the aperture regulates the amount of light that passes through the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system.

Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris.

See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm.

Iris diaphragms versus other types

A natural optical system that has a diaphragm and an aperture is the human eye. The iris is the diaphragm, and the opening in the iris of the eye (the pupil) is the aperture. An analogous dev in a photographic lens is called an iris diaphragm.

Iris (1987 film)

Iris is a 1987 Netherlands film directed by Mady Saks and starring Monique van de Ven.

Plot

A young woman, Iris, runs away to the big city on her eighteenth birthday. She moves in with an architect and decides to become a veterinarian. With an inheritance she buys an existing clinic in a backwoods town where Iris is leered at by the men, scorned by the women. Cruel jokes and gossip eventually lead to violence.A local thug breaks in her house while she is out. When she returns home late night, he attacks her, drag her to the wooden stairs, ties her hands, stretch her legs wide apart and ties to the railing of stairs and rapes her brutally.

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