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.

References

External links

Iris (EP)

Iris is Miranda Sex Garden's second release, and first EP.

Track listing

Pause

Pause may refer to:

Computing

Songs

Other

Pause (musician)

Daniel Zisette Kushnir better known by his stage name Pause is an American musician and rap artist. The multi-instrumentalist producer has risen to prominence in 2013 with placements on the Showtime series Ray Donovan (song: "Shouts Out") and Volition, Inc.'s 2013 release, Saints Row IV (soundtrack) (song: "Caroline").

Origin of Name

The name Pause was originally a nickname given to him by his father—an attempt to teach him to pause before engaging in destructive behaviour.

Discography

Pacific Rose - Special Edition (album)

External links

References

Pause (Run–D.M.C. song)

"Pause" is the first single released from Run–D.M.C.'s fifth studio album, Back from Hell. It was released in 1989 alongside Run-D.M.C.'s version of "Ghostbusters" and was produced by Jam Master Jay and Davy D. "Pause" peaked at number 51 on the Billboard Hot Black Singles chart and number 11 on the Hot Rap Singles chart.

Single track listing

A-Side

B-Side