Helmet mounted mirror

On 10/30/2014 8:39 PM, Radey Shouman wrote:


The real question is whether there is anything in common between what
the left eye sees and what the right eye sees. Let him close one eye at
a time, while wearing the mirror, and report.

I don't think we're going to get Sir to do that.

--
- Frank Krygowski

On 10/30/2014 3:01 AM, Sir Ridesalot wrote:
I went for a ride lastnight to early this morning and watched approaching
traffic in my helmet mirror. I'm really surprised that so many state they
can't judge distances or closing speeds in theirs.

Sir, you're losing track of the discussion once again. I can't tell if
it's accidental or deliberate.

Nobody has said that they can't judge distances or speeds in a helmet
(or eyeglass) mounted mirror. I do that every day. I gave a link to an
article explaining how such a thing is done without use of binocular vision.

You are claiming you can judge speed and distance in your mirror
specifically because you can see upcoming objects with both eyes,
simultaneously, through that mirror. Sorry, but that is just not
possible for any normal helmet mirror. It's been explained very thoroughly.

But perhaps your helmet mirror is nothing like the normal ones? You've
told us you have "Mirrcycle" [sic] mirrors mounted to one bike. (I
assume you mean Mirrycle. We're familiar with your spelling habits.)

So why not tell us the brand of helmet mirror you have? From that, we
can tell a lot.

--
- Frank Krygowski

In article , Joe Riel
wrote:

Sir Ridesalot writes:

On Thursday, October 30, 2014 6:32:36 PM UTC-4, JoeRiel wrote:
James writes:

On 31/10/14 02:14, Joe Riel wrote:


My eyes are about 2.5 inches apart. This means I'd need a mirror
that is nearly 2 inches wide. That is certainly doable, but I've
never seen a helmet mounted mirror that wide. How wide is yours?

If you don't follow the math, here's a simple test. Hold your
fingers apart the width of your mirror. Move your hand to where
the mirror is located. Look at a distance object with one eye
closed, then the other. To be able to see both in the mirror
simultaneously, you need to be able to see the point with each
eye, through the window of your fingers. For the mirror widths
I'm familar with, that isn't possible.


Couldn't you just ask Sir to close the eye that's closest to the
mirror while trying to look at the mirror? If the view of the mirror
is blocked by Sir's nose, the mirror wont be in view.

Sir says he can see the mirror with both eyes, I've little reason to
doubt that. I've seen pictures of helmet mounted mirrors that project
far enough forward, past the front of the helmet, such that they would
indeed be visible with both eyes. That doesn't mean you can use them
with both eyes to see the same object, but maybe his is really wide.

My immediate thought is that such a location might be less than ideal in
that it creates blind spots for both eyes, something not done with a
more rearward position.

--
Joe Riel

Easy enought to position the mirror so that it doesn't block forward vision
to road/trail traffic. I can clesrly see what's in fronto of me.

My concern isn't with forward vision, per se, but rather blocking cars
coming from the left, the left cross. On my ride today, a knot head
driving a large SUV in the outside lane (I was in the bike lane) decided
to stop mid block (45 mph four lane road) to allow a car coming from the
other direction to attempt an illegal U-turn. Because of the SUV, I
didn't see the car turning until practically on top of it (despite two
lanes and a bike lane the car had to make and 3-point turn, stopping
in the bike lane), but had slowed when I noticed the SUV braking. For
stuff like that I'd prefer not to have any blind spots to the left.

Easy. Just angle the mirror arm up a bit, so that the mirror is above
your line of vision when in your normal riding position. Just like the
rear view mirror in a car.

Just angle the mirror arm up a bit...


SO THE CHEAP PIECE OF CRAPPY recycled jug plastic breaks of n you get to pony up another $10.

'seeing' the quad pickup towing a 25' bass boat driven by a drunk is both seeing, hearing, and prescience. You hear, the Doppler, rising volume, depth of sound as the wall of sound...this gives TSD approach.