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r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
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| Posted: Sun Oct 12, 2008 9:13 am Post subject: Electronic projection history lesson. Cool stuff! |
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Hi,
Here is a good article about the history of electronic projection. The images are just stunning!
Dr. Law with a 3 x 4-ft. image produced by an RCA projector at the 25th IRE Meeting in 1937. (Photo courtesy of David Sarnoff Library, Princeton, NJ.)
First prototype of the Eidophor large-screen projection system as demonstrated in 1943.
Eidophor Model ep.6 simultaneous color projector capable of 2500 lum.
1991 Talaria 7000 Lumen 3LV Projector.
1948 RCA Monochrome CRT Projector for Theatrical Use with a 15" CRT and 42" Schmidt Optics (Photo courtesy of Radio Age)
The Schmidt-type optical system consisted of a 500-lb. 42-in. mirror with a 36-in. lens.
RCA Tri-color receiver-projector, which provides theater-size screen images, is shown with its developer, Dr. David Epstein (Photo courtesy of David Sarnoff Library, Princeton, NJ)
This is going to be my new Avatar!
Read the full story:
http://www.informationdisplay.org/article.cfm?year=2008&issue=05&file=art7
Part II
http://www.informationdisplay.org/article.cfm?year=2008&issue=09&file=art9
Maybe Kal can ask for a copy to be hosted on Curt's site. This is excelent background material!
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Oct 12, 2008 12:59 pm Post subject: |
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I have a Talaria here as shown in fig 6! Bought it in 2000, never powered it up. Have 3 spare bulbs for it too! 
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Sun Oct 12, 2008 1:21 pm Post subject: |
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The coolest thing I got out of that article was the use of the term 'wobulation', and the subsequent lookup on wikipedia:
http://en.wikipedia.org/wiki/Wobulation
Awesome!
And yeah, awesome article. Great find!
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Oct 12, 2008 5:32 pm Post subject: |
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| Curt Palme wrote: | | I have a Talaria here as shown in fig 6! Bought it in 2000, never powered it up. Have 3 spare bulbs for it too! |
That's an interesting toy! How much power does that draw?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Oct 12, 2008 5:52 pm Post subject: |
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Good info there.
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HD done right!
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donaldk
Joined: 17 Jun 2008
Posts: 308
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| Posted: Mon Oct 13, 2008 12:00 am Post subject: |
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Hey Reinier, I posted that 1949 RCA picture over on the Dutch forum quite some time ago, got it from a pdf of some TV history book. It's a nice one, they manufactured the tbes in 'near production' quantities, as the tubes were run at 80,000 Volt and only lasted hours. It is good to see SID publishing some of the articles online for non-subscribers. Last time I was discussing colourspace issues with some-one at Philips research, he had to ask his Philips colleague to scan me the article his fellow researcher had written from the SID print mag.
Overhere some-one else had already taken 'my' avatar, so will remain avatar-free for a while;-).
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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donaldk
Joined: 17 Jun 2008
Posts: 308
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| Posted: Mon Oct 13, 2008 12:16 am Post subject: |
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As the description says, it doesn't. It is merely to show/demonstrate deflection.
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