![]() BBC transmitters broadcast television programs using Baird's 30-line system from 1929 till 1932. The Baird Television Development Company was established in 1927 and absorbed by Baird International Television Ltd. The "Times" newspaper described a transmitting machine "consisting of a large wooden revolving disc containing lenses, behind which was a revolving shutter and a light sensitive cell". But how to convince the skeptical, hide-bound, select and exclusive scientific world?" His first public demonstration before a scientific audience - forty members of London's Royal Institution - took place on 28 January 1926 at 22 Frith Street in Soho. Baird was to comment: "I was definitely able to transmit the living image, and it was the first time it had been done. ![]() In order to increase image size, the scanning lines widened at the sides of the picture. ![]() Interestingly, his first subjects were not people, but ventriloquist dolls whose brightly painted, cartoon-like features heightened the contrast of the scanned image. Striving to improve image resolution, his breakthrough came on 2 October 1925 with a 30-line system capable of transmitting recognizable images of the human face. In early 1925, Baird used a 5-line scanning system to demonstrate the transmission of silhouettes at Selfridge's department store in London. By enlarging the disc and filling the holes with lenses to admit more light, Baird was able to increase sensitivity until each lens captured a segment of the subject. Points of light passing through a spiral pattern of holes on the disc's circumference scanned images into a photocell. At the core of his experiments was the image-scanning disc patented by German student Paul Gottlieb Nipkow in Berlin in 1884. Baird began the work on a system to broadcast moving images in around 1922. (69 x 39 x 54 cm), overall good condition. Baird", brown-painted aluminum case with period bakelite controls, original copper "Eye of the World" plaque with impression of Baird's signature, wood base, metal bracket feet and plaque: "Baird International Television Ltd., 133 Long Acre, W.C.2. (8 x 10 cm) viewing aperture, Mervyn mica tube, mechanism marked "Televisor" and stamped "J.L. for Baird Television Ltd., with spoked Nipkow 30-line scanning disc, screen with approx. Rare Baird "Televisor", 1928 An unusually well-preserved example of the first commercially produced television set, invented by John Logie Baird (1888-1946).
0 Comments
Leave a Reply. |