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Ballistic eyewear is a form of glasses or goggles that protect from small projectiles and fragments. For the U.S. military, choices are listed on the Authorized Protective Eyewear List (APEL). [ 1 ] Ballistic eyewear including examples that meet APEL requirements are commercially available for anyone who wishes to buy it.
In the early 20th century, goggles were worn by drivers of uncovered cars to prevent irritation of the eyes by dust or wind. [1] Likewise in the first ten years after the invention of the airplane in 1903 goggles became a necessity as wind blow became more severe as aircraft speeds increased and as protection against bugstrikes at high altitudes.
The AN/PVS-7 is a single tube biocular night vision device.Third-generation image intensifiers are able to be installed and are standard for military night vision. Most newer PVS-7 intensifier tubes are auto-gated to prevent image intensifier damage if exposed to intense light.
Panoramic night vision goggles (PNVG) increase FoV by increasing the number of sensor tubes. This solution adds size, weight, power requirements, and complexity. [69] An example is GPNVG-18 (Ground Panoramic Night Vision Goggle). [70] These goggles, and the aviation AN/AVS-10 PNVG from which they were derived, offer a 97° FoV. [68] Examples ...
The Dust Bowl is a 2012 American television documentary miniseries directed by Ken Burns which aired on PBS on November 18 and 19, 2012. The two-part miniseries recounts the impact of the Dust Bowl on the United States during the Great Depression of the 1930s. The series features the voices of Patricia Clarkson, Peter Coyote, and Carolyn ...
The goggles fit tightly against the face so that the only light entering is through the slits, and soot is sometimes applied to the inside to help cut down on glare. [2] [5] [6] The slits are made narrow not only to reduce the amount of light entering but also to improve the visual acuity. [2] Wider slits result in a larger field of view. [2]
A farmer and his two sons during a dust storm in Cimarron County, Oklahoma, April 1936; Resettlement Administration photograph by Arthur Rothstein. Farmer and Sons Walking in the Face of a Dust Storm is a 1936 photograph of the Dust Bowl taken by 21-year-old Arthur Rothstein, a photographer for the federal Resettlement Administration, while he was driving through Cimarron County, Oklahoma.
Some of the most famous dust storms of the Dust Bowl and similar conditions later were in fact synoptic scale events typically generated by a strong cold frontal passage, with storms on 11 November 1911, 9–11 May 1934, 14 April 1935, and 19 February 1954 having been particularly vivid examples.
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