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Unusual Lamp
- Thread starter d6500k
- Start date
petehall347
the brandy coffee man
sorry i had to look up what the machine does ..i found this strange video .
The optical comparators I've seen pre-date digital stuff by a wide margin. They've got a lot more in common with an overhead projector (remember those? ) than anything else. Basically a bright light and a magnifier lens casts a shadow on a graph and you count tick marks on the graph to measure it.
My grafikon is a device that you may use to judge the color of gray from quite dark to quite light.
A test chart from a source such as a DVD, allows the display calibrator to adjust the display to d65. That same d65 or 6500k is the color of the sky, noon day sun on a cloudy day. Most film /digital cameras are set to this standard. Therefore, when you view the film on a display or screen having the film shot at d65 and the display calibrated to d65, you actually get to see the artists intent either in your home on at your local cinema.
Since the grafikon was a pricy bit of kit used normally in the studio and the Calibration is done {optically}, you rarely see these on the street.
Today's gray scale Calibrations are done with spectraphotometer, spectroradiometer or tri stimulus devices that allow for extremely accurate calibrations of displays.
The optical comparator is also know as a "color comparator" and as such is not doing the same job as the devices you guys refer to.
The trick is to use the bias and drives on most new displays of the primary colors rgb, so the top of the window matches the bottom of the window very closely.. Pix 2
A test chart from a source such as a DVD, allows the display calibrator to adjust the display to d65. That same d65 or 6500k is the color of the sky, noon day sun on a cloudy day. Most film /digital cameras are set to this standard. Therefore, when you view the film on a display or screen having the film shot at d65 and the display calibrated to d65, you actually get to see the artists intent either in your home on at your local cinema.
Since the grafikon was a pricy bit of kit used normally in the studio and the Calibration is done {optically}, you rarely see these on the street.
Today's gray scale Calibrations are done with spectraphotometer, spectroradiometer or tri stimulus devices that allow for extremely accurate calibrations of displays.
The optical comparator is also know as a "color comparator" and as such is not doing the same job as the devices you guys refer to.
The trick is to use the bias and drives on most new displays of the primary colors rgb, so the top of the window matches the bottom of the window very closely.. Pix 2
