[optacon-l] Re: Request for some advice
- From: Jim Bliss <jamescbliss@xxxxxxxxx>
- To: optacon-l@xxxxxxxxxxxxx
- Date: Mon, 30 Nov 2009 08:14:42 -0800
Richard,
A simple test to see if the Optacon is operating properly is to draw a thin
straight line with a ruler with a black ball point pen (or find such a
printed line). Set the array intensity to the maximum. Then position the
camera and adjust the threshold so only one column is fully activated. The
column should feel equally strong from top to bottom with no gaps. Move the
camera so that each column is similarly activated alone and check for
uniformity and no gaps. Turn the camera 90 degrees and similarly checlk
each row.
As a researcher, you might be interested in the following references:
1. C.H. Rogers, "Choice of Stimulator Frequency for Tactile Arrays",
IEEE Transactions on Man-Machine Systems, Vol. MMS-11, No. 1, pp. 5-11,
March 1970
2. J.C. Bliss, "A Relatively High-Resolution Reading Aid for the Blind",
IEEE Transactions on Man-Machine Systems, Vol. MMS-10, No. 1, March 1969,
pp. 1-9.
Jim Bliss
On Sun, Nov 29, 2009 at 7:58 PM, Richard Vickery <
Richard.Vickery@xxxxxxxxxxx> wrote:
> Hello everyone,
>
> I am a University-based neuroscientist at UNSW in Australia. We are using
> an
> Optacon R1-B as a research tool to investigate tactile function. This is
> primarily basic research, but may in the longer term have application in
> the
> development of better haptic feedback devices for remote sensing and
> assisting
> the disabled.
>
> Our Optacon is very sensitive to the contact force between the finger and
> the
> device. If you hold your finger down on it too firmly, the pins barely move
> and
> are difficult to detect. Also the sensation produced by each column seems
> different with the side ones being least effective. I was hoping that you
> expert
> Optacon users might be able to tell me if all Optacons behave this way, or
> whether our one is in need of a major overhaul.
>
>
> Thanks in advance for your help,
>
> Best wishes
> Richard Vickery
>
>
> --
> Dr Richard Vickery
> School of Medical Sciences, UNSW, Australia, 2052
> ph. 61 2 93851676, fax 61 2 93851059
>
>
>
>
>
>
>
> to view the list archives, go to:
>
> www.freelists.org/archives/optacon-l
>
> To unsubscribe at any time, just send a message to:
>
> optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the
> quotes) in the message subject.
>
> Tell your friends about the list. They can subscribe by sending a message
> to:
>
> optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the
> quotes) in the message subject.
>
>
to view the list archives, go to:
www.freelists.org/archives/optacon-l
To unsubscribe at any time, just send a message to:
optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the
quotes) in the message subject.
Tell your friends about the list. They can subscribe by sending a message to:
optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes)
in the message subject.
Other related posts:
