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July 2008

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Subject:
From:
Rex Waygood <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Rex Waygood <[log in to unmask]>
Date:
Wed, 30 Jul 2008 08:23:17 +0100
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Look at Meiji
We use an EMZ-8TR this gives a 7-45 zoom with *10 eyepieces. (You can
use *20 but then you break the link between what you see through the
eyepieces and the camera)
It is a true trinocular and therefore you can stereo view whilst having
a camera in use.
We also have an MA571 oblique viewer which allows very oblique views to
be observed without trying to stand the board on end!!
You are mixing two very different things when you talk about video
camera and a digital camera.
We use a video camera to a low cost display for teaching and discussion
during exploration. Video cameras are low resolution in comparison to
digital cameras. We remove the video camera and replace it with a Nikon
P5000 for detailed high res pictures. The P5000 is one of a limited
number of P&S cameras that has an adaptor ring. Nikon sell an adaptor
which interfaces to the standard tube on the Meiji. We do also link the
P5000 to the monitor for live view. If you have enough money you could
go for a higher performance dSLR with live view and the appropriate
adaptor. (Look at the Olympus Range) However two notes of caution not
all cameras will allow you to use live view for long periods, and the
dSLR sensor is exposed to dust whilst in live view (the Oly does sensor
clean using US)
We have one EMZ on a CR-1 for one particular application another is on a
long arm stand.
We use fibre optic light sources as often the 'defect' can only be seen
with oblique lighting.
We used to have the video camera connected to a video capture card in a
PC, the images were not much use which is why we have the Nikon. The
images from that are mainly not manipulated but when we do manipulate we
use all sorts of software, the most complex being Corel Paintshop Pro X.



Rex Waygood
Technical Manager
 
PartnerTech Poole Ltd 
Benson Road
Poole
Dorset BH17 0RY
United Kingdom
 
Tel: +44 (0)1202 674333
Fax: +44 (0)1202 678028
DDI: +44 (0)1202 338222
Mob: +44 (0)7887 997403
 
[log in to unmask]
www.PartnerTech.co.uk

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kane, Joseph E (US
SSA)
Sent: 29 July 2008 19:16
To: [log in to unmask]
Subject: [TN] Trinocular Scope With Display

I may have an opportunity to put together a decent inspection station
for our lab.  The choices out there have my head spinning, maybe some of
you have experience or recommendations to share.  Not sure what we'll
have to spend, but this system will be used partly for customer
presentations, so I'm hoping we can do it up right.

This would be used for everything from FA on components, to solder
inspection on boards, to looking inside small chassis.  Need capability
for image capture, and maybe a nice big screen so others in the room
could see.

Optics - Trinocular, zoom, good depth of field/working distance,
magnification from about 5-7x up to about 40-50x.  Some have a lever
that disables one of the binocular eyepieces whenever you want the
camera to work, and I think this is a pain.  In the archives I saw a
recommendation for a Meiji EMZ-8TR - any others?  What about a 0.5x
objective lens to increase working distance?

Stand - Articulating, single or double boom arm?  Counterweight?
Swivel?  Biggest pain I've had is adjusting the Z height easily.
Usually you have to release the slip ring, lower it, retighten, then
release the head, and drop it down on the slip ring, sometimes heavily.
Is there any easier way to adjust?

Screen - maybe around 40".  LCD, so no burn-in.

Camera - CCD or CMOS?  Resolution?  Output?  What about Sony?  Some
might think we'd be better off with a good hi-res digital still camera.
C-mount?  Either way, is it realistic to expect that the image would be
close to what we see through the eyepieces?

Lighting - Probably a ring light and moveable fiber optic arms.
Anything new being done with LED's?  Polarization?  Any hints for
picking up tin whiskers?

Image Capture - Any special kind of card in the PC?  Software?  Probably
output in bitmap, convert to JPG.  Don't need PhotoShop, but some basic
image processing will be helpful.

Joe Kane
BAE Systems
Johnson City, NY

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