RE: reading with a crt lens
- From: "Brian Albriton" <brian@xxxxxxxxxxxxxxxxxx>
- To: <optacon-l@xxxxxxxxxxxxx>
- Date: Mon, 23 Aug 2004 11:57:40 -0700
I went home this weekend and tried my flat monitor.
I noticed in invert mode there seems to be a line on one side, the right =
side of the array.
Not sure if it has to do with threshold or what.
I'm thinking of sending the lens and optacon up to Richard Ohm to at =
least find out what it is capapble of doing interms of reading a =
computer monitor.
Brian
-----Original Message-----
From: Charles Pond [mailto:dg140@xxxxxxxxxxxxxxxxxxx]
Sent: Monday, August 23, 2004 11:06 AM
To: optacon-l@xxxxxxxxxxxxx
Subject: Re: reading with a crt lens
Hi Jerry. Are you the one who reads an oscilloscope screen with the
optacon? How do you stop that tactile jitter which I assume is the
refresh rate of the scope screen?
Charles
---
>I think it's the calculator lens that I've used much of the time for =
reading
>computer screens at home. That's the lens that's closer to the regular
>lens, isn't it? Funny, I have a real CRT lens at work and a calculator =
lens
>at home but have used both of them mostly for CRT's.
>
>Jerry
>
>----- Original Message -----=20
>From: "Charles Pond" <dg140@xxxxxxxxxxxxxxxxxxx>
>To: <optacon-l@xxxxxxxxxxxxx>
>Sent: Friday, August 20, 2004 7:06 PM
>Subject: Re: reading with a crt lens
>
>
>> I think the calculator lens could red calculators because when it =
came
>> out, the calculators use LEDs rather than LCD screens. If a new =
optacon
>> were built, either the camera would be sensitive enough to pick up =
the
>> weaker light from an LCD, or else the light signals could be =
amplified
>> aftet going through a fibre optic bundle so that the camera could =
stay
>small.
>>
>> Okay, where's the money?
>>
>> Charles
>>
>> ---
>>
>> >hi.
>> >the crt lens does not have a light source built into it.
>> >if it did, the light would wash out the light coming from the crt.
>> >I have varified this with a light probe.
>> >this is why you can not read some crts that aren't bright enough, =
not
>enough
>> >light coming from the crt or lcd screen.
>> >
>> >the calculator lens doesn't have a light source either.
>> >as a matter of fact, jim bliss told me once, that a
>> >normal lens module could be used to read a crt or calculator
>> >by placing a small plastic washer in the barrel of the lens module
>> >to insulate the retina from the contacts for the lights.
>> >i tried this, and it does indead work to a small extent.
>> >
>> >
>> >On Fri, Aug 20, 2004 at 03:13:31PM -0700, Mary Emerson wrote:
>> >> Charles,
>> >>
>> >> There must be a light in the CRT lens because there has to be a =
way for
>the
>> >> camera to see the image.
>> >>
>> >> Sliding the little sliding thing on the CRT lens makes the image =
larger
>or
>> >> smaller; like the zoom button on top of the regular optacon lens. =
The
>CRT
>> >> lens is a funny design and I don't know why they did it that way. =
I
>wish it
>> >> could've been made more like a skinny mouse, so it would be easier =
to
>get to
>> >> corners, and the beginnings of lines.
>> >>
>> >> Mary
>> >>
>> >>
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