CCDs 1/4" 2/3" of what? at DVinfo.net

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Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.


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Old July 21st, 2004, 11:51 PM   #1
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CCDs 1/4" 2/3" of what?

I've seen this and never thought to ask . . . what are they an Inch fraction of? Is there a Global CCD that IS 1" square?

Grazie

[ Dear Ken - Please put where you think best .. . Thanks, Grazie ]
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Old July 22nd, 2004, 12:04 AM   #2
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We were just discussing this over in the XL2 forum.

The Name designations refer back to vacuum tubes that were used in cameras before the CCD chip was introduced.

So, a 1/3 inch chip is not actually 1/3 of an inch in size, but gives you the same image area as a 1/3 inch tube would have (if there were such a thing as a 1/3 inch tube).

Check out this explanation on Edmund Optics site:


Section 4.3 CCD Sensor Size

Hope that helps.

Luis
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Old July 22nd, 2004, 12:11 AM   #3
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Here's a list of various chip sizes I put together last year.
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Old July 22nd, 2004, 12:27 AM   #4
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Thanks Guys! - Too kind .. . and fast too!

Luis, terrific graphical explanation .. . well understood. The valve thing is cute!

Jeff, very simple table to understand - great!

Grazie
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