Thread: It's Stuart's Fault. An Optical Acquisition.

Are those nicks in the edge or dirt on a lens? Maybe give it a rub with some sandpaper to clean it up!

Dean

I should have taken some pictures with the retical out of focus.

Remember those lines are about 0.0002" wide

Originally Posted by Oldneweng

Are those nicks in the edge or dirt on a lens? Maybe give it a rub with some sandpaper to clean it up!

Dean

They are more like flaws than nicks Dean. My B & L microscope has a 43X lens. I'll have a closer tomorrow. It's meant to be a precision straight edge. I reckon I'll avoid papering the thing.

Bob.

Stu,

These things need light. I reckon you'd have "ring" lighting well covered in your collection but I'm wondering about someting like this. The only catch is its size. The Marcel is 25mm-ish in diameter where this would mount. It could be unwieldy.

60 LED Adjustable Ring Light Illuminator Lamp FOR Stereo Zoom Microscope US Plug | eBay

Obviously this holds more appeal but I know FA about fibre optics and the light source required would add considerably to the cost.

Volpi Swiss Made Fiber Optic Ring Light | eBay

On the Marcel Aubert site they show a set up utilising a pair of small Maglites as a light source. OK for static use but probably a bit cumbersome for machine use.

Any ideas?

BT

Originally Posted by Anorak Bob

They are more like flaws than nicks Dean. My B & L microscope has a 43X lens. I'll have a closer tomorrow. It's meant to be a precision straight edge. I reckon I'll avoid papering the thing.

Bob.

You must get tired of having to explain things to a bloke from the bush LOL.



Dean

Originally Posted by Oldneweng

You must get tired of having to explain things to a bloke from the bush LOL.



Dean

I'm just a city slicker Dean. It has been suggested before that I have NFI so take anything I say with a pinch of salt.

Bob

Originally Posted by Anorak Bob

I'm just a city slicker Dean. It has been suggested before that I have NFI so take anything I say with a pinch of salt.

Bob

Yeah we got a dog like that. Cum from the city. NFI. Took years for my dog (see avatar) to teach her how to get thru fences etc. I still see her often shaking her head in disgust at the city dogs stupidity.

My dog can go thru a cyclone fence at full throttle by twisting in the air after take off to align herself with the 300mm x 150mm gap and then straightening up before landing. This is really something to see when she is motoring. The city dog just stands behind the fence and swears.

I kid you not! Absolutely true. The city dog is blonde however!

Dean

Hi BT,
In the pictures so far I've used the light source on the Zeiss. That optic ring light looks great.. though how big is it? I've seem one light source go for $20...but only because I missed the end of auction some how. Normally they run $200-$300. If the Zeiss is anything to go by there is nothing specail in them. If you had the bits I'm sure you could knock one up in an afternoon.(want some pictures?)
I'd say that LED ring you linked at is to bulky.

Given the small field of view you really dont need much power, it just has to be in the right spot. I have one of these torches.
Cree LED 7W 300LM High Power Adjustable Focus Zoom IN OUT Mini Flashlight Torch | eBay
And it works great (though holding it by hand is a pain, a bracket shouldnt be beyound your skills )
They also come in black. You can use the zoom as brightness control.
In fact I might make that my next project...... want one?



Stuart

Originally Posted by Stustoys

Hi BT,

...want some pictures?

Stuart

Yes please.

Sorry about the wait.
Here you go.
Don't let the big box fool you into thinking there is a lot very clever stuff going on inside.(filing cabinet for scale)
Transformer, fan and a dimmer.
No lenses just a 100W bulb(although if I recall correctly it does have a different shaped reflector than "normal". Nothing like a little "brute force" to get the job done.
The fan draws air between the blub and fibre. I assume the fibre cant be allowed to get to hot.

Stuart

Originally Posted by Oldneweng

Yeah we got a dog like that. Cum from the city. NFI. Took years for my dog (see avatar) to teach her how to get thru fences etc. I still see her often shaking her head in disgust at the city dogs stupidity.

My dog can go thru a cyclone fence at full throttle by twisting in the air after take off to align herself with the 300mm x 150mm gap and then straightening up before landing. This is really something to see when she is motoring. The city dog just stands behind the fence and swears.

I kid you not! Absolutely true. The city dog is blonde however!

Dean

Nice Dean. Don't hold back.

Originally Posted by Anorak Bob

Nice Dean. Don't hold back.

No disrespect intended Bob. I have a lot of respect for your help and knowledge.

Dean

A few pictures of the insides(the easy end).
Loosen the single grub screw and slide the Ocular lens/reticle out of the tube with the Objective lens and inverting prisms(?).(thats the grub screw to use to rotate the recticle)
Loosen the three screws holding the eyepiece cover on.
Remove the single screw holding the Ocular lens and slide out
Loosen(a fair way) the fours screws holding the reticle in, now find something "the right size" to sit on the steel ring holding the reticle(the glass sits below the steel surface so it just needs to be flat), flip over then lift off the outside and you should be left with the recticle.*
Clean, replace.
Be careful to get the grub screws on the flats on the reticle, lining up the slot for the screw that holds the Ocular in (its very easy to catch the edge and raise a burr, at least on mine this isnt done up tight) and when you slide the Ocular /recticle back into the tube rotate it to help release the air or it might just pop back out when you let it go.

Stuart

*with a "specail tool" a little smaller in diameter then mine you could loosen the screws and then slide it down over the "tool" which would lift the reticle out without the need to flip.

Thank you Stu.