NavList:

Herbert,

On Wed, 12 Jul 2006, Herbert Prinz wrote:

> Yes, but for the collimation check I also want to be able to rest it on
> the sextant frame and be assured that the laser beam is parallel to the
> edge on which it is resting.

If I understand Frank's proposal correctly,
the laser has to be fixed behind the scope
(so that it sends the beam to the eyepiece of the scope).

So I cannot see how it can be fixed to the sextant frame.
I imagined using a vice or a clamp behind the
sextant, to fix the laser rigidly.
Then it is probably not hard to achieve parallelism
of the beam to the telescope axis.

This parallelism has to be assured in any case, no matter
how fix the laser.

The light switch problem you mention seems easy to fix.
(Using skotch tape, or an assistant:-)

> Frank's device is not too big to be placed on the
> sextant frame, has straight edges, and an on/off switch.

You think it has a straight edge strictly parallel to the beam?

In any case, I don't understand how are you going to
place it on the frame BEHIND the scope.
It has to send the light so that the beam enters
the scope through the eyepiece and leaves through the
objective lense.

Alex.



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