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tony359
Joined: 04 Aug 2006
Posts: 378
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| Posted: Sun Oct 14, 2007 11:54 pm Post subject: Colorimeter and light measurement |
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Seems that there is not a dedicated section, so I'm posting here.
For my work I need to buy a device able to measure the light reflected from screens. I work in cinemas and I want a device that tells me how much light I'm projecting on the screen.
This device is not so cheap. I wonder if I can buy a more complete device with a color analyzer suitable for analyze reflected light (and perhaps even to calibrate an LCD monitor?) to use on my Home Theater and, in a near future, to calibrate Digital Projectors for cinemas.
Do you have any suggestions?
Ciao
Antonio
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oliverg
Joined: 15 May 2007
Posts: 800
Location: Melbourne, Australia
TV/Projector: Sony G90 X2 - Vidikron Vision 1
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tony359
Joined: 04 Aug 2006
Posts: 378
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| Posted: Mon Oct 15, 2007 10:27 am Post subject: |
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Hi Oliver
Check my previous message, I need something to measure the light on a screen, something like this one
http://www.sekonic.com/products/products.asp?ID=131
This is the one I'm going to buy. I wonder if someone of you can know a similar device able to measure the colors too.
Ciao
A
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oliverg
Joined: 15 May 2007
Posts: 800
Location: Melbourne, Australia
TV/Projector: Sony G90 X2 - Vidikron Vision 1
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| Posted: Mon Oct 15, 2007 10:40 am Post subject: |
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Sorry - from the title it looked like you were after a colorimeter, not a light meter. I don't personally know of an all in one device. AFAIK you need two seperate devices
Good luck
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mack1
Joined: 21 Mar 2006
Posts: 494
Location: SARNIA
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| Posted: Tue Oct 16, 2007 12:59 am Post subject: |
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How would you use this with a crt pj 
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oliverg
Joined: 15 May 2007
Posts: 800
Location: Melbourne, Australia
TV/Projector: Sony G90 X2 - Vidikron Vision 1
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| Posted: Tue Oct 16, 2007 1:07 am Post subject: |
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Its placed on the screen and turned around so the sensor is facing the CRT
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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| Posted: Tue Oct 16, 2007 1:16 am Post subject: |
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Or you point it at the screen, making sure it doesn't see its shadow. This is preferred for several reasons: it includes the screen in the measurement (in case the screen causes any color changes), and it eliminates any concerns about where the sensor is looking. If the sensor has any degree of directionality, and it's pointed more at the blue or more at the red, that can dramatically affect your color temp reading. Reading off the screen avoids that.
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oliverg
Joined: 15 May 2007
Posts: 800
Location: Melbourne, Australia
TV/Projector: Sony G90 X2 - Vidikron Vision 1
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| Posted: Tue Oct 16, 2007 1:23 am Post subject: |
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Thanks Gary. That's a gem of information there.
Kind regards
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