reflected light silicon chip die

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MichaelG.
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Re: reflected light silicon chip die

#31 Post by MichaelG. » Sun Apr 05, 2020 9:18 am

I don’t want to hi-jack this thread
... Hopefully, it’s not too late already :oops:

I have scanned, OCR’d and translated (using DeepL) page 7 of the above

Clearly this will need some correction, but here is that first effort:
A Supporting surface of the attachment Tube 190mm
ditto
160mm
c Object level
In order to increase the contrast of the
Objects serve replaceable light filters 10, which
in the lighting system after collector 2 on
are sorted
When working in the dark field, the beams
the darkfield plate <T> is inserted, the
consists of the orifice 11 and the mirror 12, and
the field diaphragm 6 is opened completely
In this case, the rays of the light source
due to its wide bundle also on the outside of the lens 3
Afterwards the central area of the beam
lenbundle through orifice 11, but
the outer area of the bundle to the ring mirror 12
which has been inserted instead of reflector 4
is to continue on the mirror condenser
of the epiobjek
tivs 5 and then thrown onto the object
The apertures of the objective and mirror cores
densors are calculated in such a way that the objective
only those rays can reach which are
and through which now a bright image of the
Structure of the object reflected or scattered
object on dark background of the microscope field
is achieved
The: illumination of the object in transmitted light is
with the lighting system
(22oV15w)
The light source 13 provides the light for the
and the frosted glass 16 for a uniform eye 2)
tors 14(Lens of the lighting device Ou-3
illumination of the microscope field
The main parts of the microscope (components) are
the microme ter mechanism in body 17(Fig. 2)
the base 18(Fig. 2), the lighting device
19, the body 20, the head 21 with revolver, the
object table 22 on the support arm. The body of the micro-
meter mechanism is connected to the base of the microscope
rigidly connected



Translated with www.DeepL.com/Translator (free version)
MichaelG.
Too many 'projects'

MicroBob
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Joined: Sun Dec 25, 2016 9:11 am
Location: Northern Germany

Re: reflected light silicon chip die

#32 Post by MicroBob » Sun Apr 05, 2020 2:43 pm

Hi Michael,
your microscope can be set up for different incident light methods and the right mix of components (so you have them) will do the trick. If you have specific questions about the automatic translations I'm happy to help. Of cause I don't know the quality of the translation from russian into german language. These microscopes were never sold in Germany in any numbers so it probably is an amateur translation too.

Bob

MichaelG.
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Location: NorthWest England

Re: reflected light silicon chip die

#33 Post by MichaelG. » Sun Apr 05, 2020 5:53 pm

Thanks a million, Bob, for prompting me to have a proper look at the illumination path:

First, I discovered that the slider does not contain a prism, but is indeed a pellicle type mounted in a machined metal block ... This is of no consequence, but it does mean that the depiction of item [12] on the diagram is more appropriate than I first thought.

Then, I realised that you were absolutely correct ... To use the ring lighting, we need a patch-stop to block the light from reaching the lens at the centre of [3]
.
Note: This is a restoration project &lt; blush &gt;
Note: This is a restoration project < blush >
E97732EC-B8C7-4137-BAFA-96ED5204BEDE.jpeg (201.53 KiB) Viewed 984 times
.
Now for the BAD news : For a quick test, I blocked that central lens with a patch of Aluminium tape
The result was worse than I could have possibly imagined ... The image is much, much, worse than the one shown earlier, it is barely distinguishable !

There is obviously something seriously wrong; but in the absence of a detailed manual I will need to experiment.

Edit: I have just realised what I did there ^^^
____ It’s bedtime now, so I will ‘sleep on it’


MichaelG.
Too many 'projects'

Wes
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Joined: Sat Mar 09, 2019 12:58 pm

Re: reflected light silicon chip die

#34 Post by Wes » Wed Apr 08, 2020 6:12 am

PeteM wrote:
Sat Apr 04, 2020 5:21 pm
Here's the US Ebay link, Wes. Seller "aberco" is in France. I bought mine back on Feb. 1st.

https://www.ebay.com/sch/aberco/m.html? ... pg=&_from=
Thank you so much! These are not expensive at all, perhaps we can trade different chips :D

MicroBob
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Location: Northern Germany

Re: reflected light silicon chip die

#35 Post by MicroBob » Wed Apr 08, 2020 7:36 am

Hi Michael,
I haven't experimented a lot with these setups so I don't have much experience. What I can tell is:
- that contrast is always a bit problematic due to scatteded light
- the ring mirror is different for different objectives
- the ring mirror has to sit on the right height
- the light quality (directed vs. diffuse) has an influence on the result, somtimes diffusing rings are used
- a lot of light is needed
- to go through the light path it probably has to be a well focussed bundle of the right diameter
- epi objectives often had a hard life and front lenses are chipped or etched
- when it works it has lots of potential for stunning images! :D

Bob

MichaelG.
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Re: reflected light silicon chip die

#36 Post by MichaelG. » Wed Apr 08, 2020 11:16 am

Watch this space, Bob

As mentioned in my update to Sunday's Post
I realised what was wrong :oops:

This looks like being a bigger project than I anticipated, but I think it will be worth it in the end

Thanks for all your helpful input ... it's greatly appreciated.

MichaelG.

.

Edit: The BIG problem was that I had not realised the 'Slider' that I have is the one for true axial illumination ... but I was trying to use the 'ring light' :oops:
This became obvious when I masked the small lens with Aluminium tape !!

Today, I have done some rough shots with all four objectives, using them with axial illumination
There is a lot of work still to do on this 'scope ... but at least I am now confident that it's worth working-on.

.
F=25, NA 0.17 : reduced to 800 x 600
F=25, NA 0.17 : reduced to 800 x 600
P1250861_ss.jpg (176.6 KiB) Viewed 950 times
.
9x, NA 0.20 : reduced to 800 x 600
9x, NA 0.20 : reduced to 800 x 600
P1250862_ss.jpg (187.2 KiB) Viewed 950 times
.
F=10, NA 0.4 : reduced to 800 x 600
F=10, NA 0.4 : reduced to 800 x 600
P1250863_ss.jpg (147.02 KiB) Viewed 950 times
.
F=6.3, NA 0.65 : reduced to 800 x 600
F=6.3, NA 0.65 : reduced to 800 x 600
P1250864_ss.jpg (84.79 KiB) Viewed 950 times
.

It's looking like the resolution of the two higher powers cannot cope with the detail on this chip [at least with the under-run Halogen Lamp that I was using]
... In due course, I will try with shorter-wavelength illumination and more carefully adjusted illuminator optics.

Has anyone had time to estimate the separation of any of the details on this chip ?
... It should make an excellent test object.

MichaelG.
Too many 'projects'

MichaelG.
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Re: reflected light silicon chip die

#37 Post by MichaelG. » Fri May 22, 2020 10:59 pm

I used the chip as a test object today, on the LOMO Biolam M with my experimental light source.

There is a lot still to do, but I thought it worth posting this, taken using the 9x 0.20 NA objective and 1.1x magnification in the head.

The photo-tube is intended for full-frame 35mm, but I used the 5.1Mp Toupcam
... which has a small sensor 1/2.5"(5.70x4.28)
.
Full frame, reduced to 800x600
Full frame, reduced to 800x600
FA3DB939-E51A-4A04-AE21-ABE66AF480C8.jpeg (122.91 KiB) Viewed 769 times
.
Lower Right corner, at full resolution
Lower Right corner, at full resolution
92233BF5-E71E-4E6D-BC28-D42E3FE10141.jpeg (118.78 KiB) Viewed 769 times
.

I would be most grateful if someone with one of these chips, and a good set-up, could photograph a similar region: To give me something to aspire to !!

MichaelG.
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wporter
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Re: reflected light silicon chip die

#38 Post by wporter » Sat May 23, 2020 2:47 am

Here is a similar chip imaged episcopically with my Univar, in darkfield, brightfield, BF with the epi condenser offset a bit (two of those shots) and phase, all with the 50x Reichert Plan Fluor objective.

I'll try this on a Balplan and a Zeiss Universal when I get a chance.
Attachments
DF chip.JPG
DF chip.JPG (245.64 KiB) Viewed 752 times
BF offset cond chip.JPG
BF offset cond chip.JPG (196.58 KiB) Viewed 752 times
BF offset cond 2 chip.JPG
BF offset cond 2 chip.JPG (210.54 KiB) Viewed 752 times
BF chip.JPG
BF chip.JPG (163.9 KiB) Viewed 752 times
Ph chip.JPG
Ph chip.JPG (206.33 KiB) Viewed 752 times

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wporter
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Location: United States

Re: reflected light silicon chip die

#39 Post by wporter » Sat May 23, 2020 2:51 am

MichaelG, forgot to add that you may have one of those chips that has a coating. PeteM alerted me as to the existence of those; that could seriously mess up the microscopy!

MichaelG.
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Re: reflected light silicon chip die

#40 Post by MichaelG. » Sat May 23, 2020 4:35 am

wporter wrote:
Sat May 23, 2020 2:51 am
MichaelG, forgot to add that you may have one of those chips that has a coating. PeteM alerted me as to the existence of those; that could seriously mess up the microscopy!
Thanks for the astonishingly good images ...
and for that important postscript, which brings me a glimmer of hope !!

MichaelG.

.

Edit: __ I have downloaded your translation of the Univar manual
https://user.xmission.com/~psneeley/Per ... l-v1.3.pdf
in the hope that the LOMO might learn something from it, by osmosis :D
Too many 'projects'

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