[DIY]Shutterglasses test bench
Posted: Tue Mar 23, 2010 12:45 pm
I made a simple test bench to compare the performances of my different shutterglasses.
It is basically a piece of cardboard with two white leds and two photodiodes in front on each leds :
To get an acurate measure of the light passing through the glasses, I use a simple circuit with an operationnal amplifier :
I adjust the resistance to get 10V at the output without the glasses between the led and the photodiode. Then I can easyly determine the brightness loss caused by the glasses.
With the output connected to an oscilloscope I can also see the shutter speed.
Example on the Elsa wired @120Hz:
A: DDC signal
B: measured brightness
As you can see, the shutter doesnt go totally clear, thus I measure Toff from 100% (shutter closed) to 10% (shutter almost fully open)
So here are the results :
Elsa revelator wired :
color fidelity:
transparency (power off):29,5%
transparency (on@120Hz) :10%
Ton :380µs
Toff (100-10%) :4,56ms
Simuleyes (powered with 5V):
color fidelity:
transparency (power off):13%
transparency (on@120Hz) :6%
Ton :750µs
Toff (100-10%) :4,4ms
Asus glasses (on the simuleyes controller) :
color fidelity:
transparency (power off):27%
transparency (on@120Hz) :10%
Ton :600µs
Toff (100-10%) :4,26ms
I have ordered Nvidia's 3D vision glasses and I will soon make the same tests with it.
[edit]
Nvidia 3D vision :
color fidelity:
transparency (power off):31,9%
transparency (on@120Hz) :16,5%
Ton :700µs
Toff (100-10%) :2,3ms
[edit]
Xpand X101 :
pi state (ON state with both shutters opened):
Off state :
color fidelity:
transparency (pi state):27%
transparency (on@120Hz):15,8%
Ton :600µs
Toff (100-10%) :1,54ms
[edit]
Crystaleyes CE2 :
I've repaired these glasses, that explain the screws and the white foam for nose piece
Transparency (power off):29,6%
Transparency (on@120Hz) :11,6%
Ton :450µs
Toff (100-10%) :4,3ms
It is basically a piece of cardboard with two white leds and two photodiodes in front on each leds :
To get an acurate measure of the light passing through the glasses, I use a simple circuit with an operationnal amplifier :
I adjust the resistance to get 10V at the output without the glasses between the led and the photodiode. Then I can easyly determine the brightness loss caused by the glasses.
With the output connected to an oscilloscope I can also see the shutter speed.
Example on the Elsa wired @120Hz:
A: DDC signal
B: measured brightness
As you can see, the shutter doesnt go totally clear, thus I measure Toff from 100% (shutter closed) to 10% (shutter almost fully open)
So here are the results :
Elsa revelator wired :
color fidelity:
transparency (power off):29,5%
transparency (on@120Hz) :10%
Ton :380µs
Toff (100-10%) :4,56ms
Simuleyes (powered with 5V):
color fidelity:
transparency (power off):13%
transparency (on@120Hz) :6%
Ton :750µs
Toff (100-10%) :4,4ms
Asus glasses (on the simuleyes controller) :
color fidelity:
transparency (power off):27%
transparency (on@120Hz) :10%
Ton :600µs
Toff (100-10%) :4,26ms
I have ordered Nvidia's 3D vision glasses and I will soon make the same tests with it.
[edit]
Nvidia 3D vision :
color fidelity:
transparency (power off):31,9%
transparency (on@120Hz) :16,5%
Ton :700µs
Toff (100-10%) :2,3ms
[edit]
Xpand X101 :
pi state (ON state with both shutters opened):
Off state :
color fidelity:
transparency (pi state):27%
transparency (on@120Hz):15,8%
Ton :600µs
Toff (100-10%) :1,54ms
[edit]
Crystaleyes CE2 :
I've repaired these glasses, that explain the screws and the white foam for nose piece
Transparency (power off):29,6%
Transparency (on@120Hz) :11,6%
Ton :450µs
Toff (100-10%) :4,3ms