File:Science and Invention Television 1928.jpg
来自Wikimedia Commons
跳转到导航
跳转到搜索
本预览的尺寸:800 × 445像素。 其他分辨率:320 × 178像素 | 640 × 356像素 | 1,138 × 633像素。
原始文件 (1,138 × 633像素,文件大小:217 KB,MIME类型:image/jpeg)
文件信息
结构化数据
说明
摘要[编辑]
描述Science and Invention Television 1928.jpg |
English: A woman watching an early homemade experimental mechanical television receiver in 1928, from Hugo Gernsback's magazine Science and Invention. During the 1920s some radio stations began broadcasting experimental television programs, which could be viewed by mechanical "televisor" receivers like this one. The video signal from the receiver (left) is applied to a neon lamp in the viewer (right). In front of the lamp a metal disk with holes rotates, creating the scan lines of the image. This created a dim monochrome orange image 1.5 inches (4 cm) square with 48 scan lines at 7.5 frames per second, visible within the viewing cone, which the woman is watching. These mechanical-scan television technologies never achieved images of sufficiently high quality to catch on with the public, and were superseded by electronic scan television broadcasts in the 1930s. Page scans of the above article How to build the S&I Television Receiver on Commons:
|
日期 | November 1928. This page scanned August 2008. |
来源 | Science and Invention magazine, November 1928, Volume 16, Number 7, cover, published by Experimenter Publishing Co., New York, NY. This page was scanned by User:Swtpc6800 on an Epson Perfection 1240U at 300 dpi with half-tone de-screening enabled and stored as TIFF. The image was cropped and touched up in Adobe Photo Elements 5.0. This copy saved as a 150 dpi JPG. |
作者 | 未知Unknown author |
授权 (二次使用本文件) |
This 1928 issue of Science and Invention would have the copyright renewed in 1955. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. http://onlinebooks.library.upenn.edu/cce/ The search of the Renewals for Periodicals for 1954, 1955 and 1956 show no renewal entries for Science and Invention. Therefore the copyright on the magazine was not renewed and it is in the public domain. Science and Invention ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for Science and Invention. All issues are in the public domain. |
其他版本 | Image:Science and Invention Nov 1928 pg618.png |
许可协议[编辑]
Public domainPublic domainfalsefalse |
|
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2008年8月9日 (六) 17:45 | 1,138 × 633(217 KB) | Swtpc6800(留言 | 贡献) | A slight adjustment of the rheostats and the picture come in clearly. This photo shows the complete television receiver connected to an ordinary radio set. The picture is seen in the cone. == Summary == {{Information | Description= A slight adjustment |
您不可以覆盖此文件。
文件用途
没有页面使用本文件。
全域文件用途
以下其他wiki使用此文件:
- ar.wikipedia.org上的用途
- en.wikipedia.org上的用途
- et.wikipedia.org上的用途
- fr.wikipedia.org上的用途
- ga.wikipedia.org上的用途
- ja.wikipedia.org上的用途
- ko.wikipedia.org上的用途
- ru.wikipedia.org上的用途
- zh.wikipedia.org上的用途
元数据
此文件含有额外信息,这些信息可能是创建或数字化该文件时使用的数码相机或扫描仪所添加的。如果文件已从其原始状态修改,某些详细信息可能无法完全反映修改后的文件。
图像标题 | A slight adjustment of the rheostats and the picture come in clearly. This photo shows the complete television receiver connected to an ordinary radio set. The picture is seen in the cone.
Science and Invention, November 1928. Volume 16 Number 7. Photo from page 618. |
---|---|
著作权所有人 | The copyright on the magazine was not renewed and it is in the public domain.
Published October 10, 1928 by Experimenter Publishing. New York, NY. |
宽度 | 2,276 px |
高度 | 1,267 px |
每色彩组分位数 | 8 |
压缩方案 | LZW |
像素构成 | 黑白(黑为0) |
方向 | 标准 |
色彩组分数 | 1 |
水平分辨率 | 150 dpi |
垂直分辨率 | 150 dpi |
使用软件 | Adobe Photoshop Elements 5.0 Windows |
文件修改日期时间 | 2008年8月9日 (六) 10:36 |
色彩空间 | 无标定 |