I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.

I need to be able to adjust the tilt of all the mirrors so that they
all point in slightly different directions. Can anyone think of a good
way of doing that?

The mirrors have a sticky back so would be stuck to something that
could be adjustable. That would have to be small and lighweight. Once
adjusted, I don't want the setting to change.

Now that I've typed all this I have thought of a very simple solution.
But maybe yours is better!

"Matty F" wrote in message
ups.com...
I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.

I need to be able to adjust the tilt of all the mirrors so that they
all point in slightly different directions. Can anyone think of a good
way of doing that?

The mirrors have a sticky back so would be stuck to something that
could be adjustable. That would have to be small and lighweight. Once
adjusted, I don't want the setting to change.

Now that I've typed all this I have thought of a very simple solution.
But maybe yours is better!

Ask Jeremy Jago how he mounted his.
http://www.nbtv.wyenet.co.uk/conv04.htm

--

Graham.
%Profound_observation%

On Apr 9, 1:34 am, "Graham" wrote:

Ask Jeremy Jago how he mounted his.http://www.nbtv.wyenet.co.uk/conv04.htm

Good heavens, mechanical television is still alive!
I just want to spread a laser over a two dimensional area.

"Matty F" wrote in message
ups.com...
I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.

I need to be able to adjust the tilt of all the mirrors so that they
all point in slightly different directions. Can anyone think of a good
way of doing that?

The mirrors have a sticky back so would be stuck to something that
could be adjustable. That would have to be small and lighweight. Once
adjusted, I don't want the setting to change.

Now that I've typed all this I have thought of a very simple solution.
But maybe yours is better!

You making a mini deathray?

http://www.solardeathray.com/

Hellraiser............

"Matty F" wrote in message
oups.com...
On Apr 9, 1:34 am, "Graham" wrote:

Ask Jeremy Jago how he mounted
his.http://www.nbtv.wyenet.co.uk/conv04.htm

Good heavens, mechanical television is still alive!
I just want to spread a laser over a two dimensional area.

Well as Baird only used 30 mirrors I thought you
were going HD!

--

Graham.
%Profound_observation%

On 8 Apr 2007 06:22:06 -0700, "Matty F"
wrote:

I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.

I need to be able to adjust the tilt of all the mirrors so that they
all point in slightly different directions. Can anyone think of a good
way of doing that?

The mirrors have a sticky back so would be stuck to something that
could be adjustable. That would have to be small and lighweight. Once
adjusted, I don't want the setting to change.

Now that I've typed all this I have thought of a very simple solution.
But maybe yours is better!

Sticky back and 300rpm?

Forget it!

"Matty F" wrote in message
ups.com...
I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.

I need to be able to adjust the tilt of all the mirrors so that they
all point in slightly different directions. Can anyone think of a good
way of doing that?

The mirrors have a sticky back so would be stuck to something that
could be adjustable. That would have to be small and lighweight. Once
adjusted, I don't want the setting to change.

Now that I've typed all this I have thought of a very simple solution.
But maybe yours is better!

Silicon sealant/mastic!

Set mirrors on plasticine blobs.
Rotate disk slowly to see the effect and get the angles right.
Seal around the edges carefully and wait to dry.

300 rpm....Hmmmm.........Make sure alls dry first and I reckon it'll work

On Apr 9, 4:21 am, EricP wrote:
On 8 Apr 2007 06:22:06 -0700, "Matty F"
wrote:

I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.


Sticky back and 300rpm?

Forget it!

But that's only 5 revolutions per second. I can wave my hand around
that fast. Do you really think it's a problem?

On 8 Apr 2007 14:16:44 -0700, "Matty F"
wrote:

On Apr 9, 4:21 am, EricP wrote:
On 8 Apr 2007 06:22:06 -0700, "Matty F"
wrote:

I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.


Sticky back and 300rpm?

Forget it!

But that's only 5 revolutions per second. I can wave my hand around
that fast. Do you really think it's a problem?

Ah but do you have mirrors attached to your hands?

--
Frank Erskine

In message , Frank Erskine
writes
On 8 Apr 2007 14:16:44 -0700, "Matty F"
wrote:

On Apr 9, 4:21 am, EricP wrote:
On 8 Apr 2007 06:22:06 -0700, "Matty F"
wrote:

I wish to attach about 40 small mirrors around the outside of a disk.
The mirrors are 10mm square and the disk will be about 130mm diameter
and 10mm thick. The disk will spin at about 300rpm.


Sticky back and 300rpm?

Forget it!

But that's only 5 revolutions per second. I can wave my hand around
that fast. Do you really think it's a problem?

Ah but do you have mirrors attached to your hands?

I bet the Medway Handyman is making notes for his cabaret act as we type

--
geoff

On Apr 9, 1:58 am, "Hellraiser"
wrote:

You making a mini deathray?

http://www.solardeathray.com/

Very interesting thanks. But nobody will be able to guess what I'm
making. It will be very useful if it works.

In message .com,
Matty F writes
On Apr 9, 1:58 am, "Hellraiser"
wrote:

You making a mini deathray?

http://www.solardeathray.com/

Very interesting thanks. But nobody will be able to guess what I'm
making. It will be very useful if it works.

Ah - you need adaptive optics then ...


--
geoff

On 8 Apr, 22:34, "Matty F" wrote:
Very interesting thanks. But nobody will be able to guess what I'm
making. It will be very useful if it works.

A laser projector?
http://heim.ifi.uio.no/haakoh/avr/

John

On Apr 9, 2:49 pm, "John" wrote:
On 8 Apr, 22:34, "Matty F" wrote:

Very interesting thanks. But nobody will be able to guess what I'm
making. It will be very useful if it works.

A laser projector?http://heim.ifi.uio.no/haakoh/avr/

Well yes, in a way. I want to project to a screen about 1000 metres
away.
I think I'll just shape the disk so that the edge gradually slopes
away from the vertical, and stcik the mirrors directly on the edge. No
adjustment needed. Since I'm not drawing pictures it doesn't have to
be that accurate.