P3D Re: My experience with the NuView

[Andrew Woods <andrew@xxxxxxxxxxxxxxxxxxxxx>]

Keith Wolfson wrote:
> It's everything NuView say it is. Easy to set up, easy to use, great 3D.
> The picture quality is fine as far as I can assess - I haven't yet had time
> to do more than a few minutes of filming.  But the degree of flicker is
> unpleasant.  I'm recording in PAL, so I'm only getting 25fps per eye,
> whereas in NTSC you'll get 30 fps per eye, and NuView says that makes quite
> a difference.

Part of the reason for the bad flicker with PAL is the very good quality
of the glasses bundled with the NuView.  The glasses are manufactured by
NuVision and they call them 3D-Spex.  The glasses have very good transmission
(they let a lot of light through in the clear state) and a very good 
extinction ratio (the ratio between the amount of light they let through
in the off and on states) which determines how much ghosting you see (due
to the glasses).

Since the image seen through the glasses is still quite bright, the 25Hz 
flicker seen by the glasses (half PAL 50Hz) is much more evident than
shutter glasses of the past (e.g. Sega, Nintendo).

Flicker is more perceptible the brighter the image is (and the lower
the frequency).

To reduce the flicker to an acceptable level with your existing equipment
you could:  (1) turn off or reduce the room lighting, (2) place neutral
density filters over the front of the glasses or (3) reduce the
brightness of the TV.

Another solution entirely to remove the flicker of 50Hz stereo is to
use a device called a 3D scan converter which increases the display
rate from 50Hz to 100Hz, but these systems will set you back several
thousands of dollars.

Cheers.
Andrew Woods.

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