What is it? Mitutoyo DIC
Moderators: rjlittlefield, ChrisR, Chris S., Pau
What is it? Mitutoyo DIC
Finally got my Mitutoyos out of the box. Here is the 10x mounted on a scope with reflected DIC. See if you can guess the subject. These photos are all of different parts of the same item. I'll be very surprised if someone can guess what it is.
An electroplated knurled knob/thumbscrew?
The grooves look rather well made, they're often created with a tool which just squashes the metal into place, though yours look machined.
You don't DO Darts in the US do you?
The grooves look rather well made, they're often created with a tool which just squashes the metal into place, though yours look machined.
You don't DO Darts in the US do you?
2nd guess Chris, that's pretty good. Part of it does have a knurled thumb grip and I'll end it here. Its an audio connector. The first photo is the RCA prong. http://www.ebay.com/itm/1-4-female-to-R ... 19da3e069a
And yes we do play darts in the US.
And yes we do play darts in the US.
These are really good images, even though I missed the idea of the game. One look at these and I thought, "Curt is challenging us to guess what object the knurled metal is on." That it was knurled metal seemed clear from the get-go. (Am I spending too much of my time looking at metal through Mitutoyo objectives?)
For the first time ever, I would really, really like to see what one of these images would look like as a stereo pair. (Stereo is hard for me to see, but I'll risk the headache in this case--and yes, I should send for some of those stereo viewing glasses.)
As Curt and quite a few others likely know, reflected DIC has some differences from transmitted DIC (the usual DIC approach seen at this forum). One of those differences is the nature of the additional visual information gained by using DIC. With transmitted light, the increased contrast tells you something about variations in optical density of the subject; with reflected light, it tells something of variations in surface topology. So I wonder if, in a stereo pair done with reflected DIC, we might get a particularly nice 3D effect?
BTW, Curt, can I ask what microscope you were using?
I have a set of Nomarski prisms that I picked up for making a reflected DIC attachment for the Bratcam. Seeing your images is good incentive to get off my duff and get it done.
--Chris
For the first time ever, I would really, really like to see what one of these images would look like as a stereo pair. (Stereo is hard for me to see, but I'll risk the headache in this case--and yes, I should send for some of those stereo viewing glasses.)
As Curt and quite a few others likely know, reflected DIC has some differences from transmitted DIC (the usual DIC approach seen at this forum). One of those differences is the nature of the additional visual information gained by using DIC. With transmitted light, the increased contrast tells you something about variations in optical density of the subject; with reflected light, it tells something of variations in surface topology. So I wonder if, in a stereo pair done with reflected DIC, we might get a particularly nice 3D effect?
BTW, Curt, can I ask what microscope you were using?
I have a set of Nomarski prisms that I picked up for making a reflected DIC attachment for the Bratcam. Seeing your images is good incentive to get off my duff and get it done.
--Chris
Hi Chris,
Thanks, it was my first time using the mitutoyo. I only wanted to see if the objectives would work with my DIC prisms but ended up taking some incomplete stacks in the process.
The scope is an AO Epistar. In the past I've also had the Reichert Epistar but sold it. Its an interesting and unique design. The nose piece turret has an integrated DIC prism turret with prism slider. I like that you can use different prisms for different objectives without unscrewing the objective. Zeiss and Olympus have removable objective adapters with prism sliders while Nikon's adapter was fixed to the nose piece. The prisms work well with the Mitutoyo. Probably due to the original AO objectives being infinity corrected as well. Another benefit is the focusing is done on the nose piece and not the stage. That's very helpful since the Mitutoyos are so long that I had to completely remove the stage to attain focus.
It does have some negatives. I don't understand why AO and Reichert didn't include an aperture in their fluorescence or metallurgical epi-illuminators. This is no exception, only a field diaphragm. The vignette is pretty bad. I'm not sure if this is due to the nikkor 200mm I used as a tube lens or the intermediates of the scope. The focusing mechanism is poor. And lastly(this isn't a design flaw) the light is not functioning so I used a weak led flashlight that made these 10s exposures.
In my opinion, the only benefit of DIC is reflected light is for examining very slight changes in depth. I personally prefer diffused dark field for most specimens.
I'd attempt a stereo pair but without a viewer I wouldn't be able to test it. I was actually considering buying one the other day. Do you know a good brand to buy?
I'm looking forward to seeing your bratcam DIC module. I'm sure it will be a smooth looking unit.
Thanks, it was my first time using the mitutoyo. I only wanted to see if the objectives would work with my DIC prisms but ended up taking some incomplete stacks in the process.
The scope is an AO Epistar. In the past I've also had the Reichert Epistar but sold it. Its an interesting and unique design. The nose piece turret has an integrated DIC prism turret with prism slider. I like that you can use different prisms for different objectives without unscrewing the objective. Zeiss and Olympus have removable objective adapters with prism sliders while Nikon's adapter was fixed to the nose piece. The prisms work well with the Mitutoyo. Probably due to the original AO objectives being infinity corrected as well. Another benefit is the focusing is done on the nose piece and not the stage. That's very helpful since the Mitutoyos are so long that I had to completely remove the stage to attain focus.
It does have some negatives. I don't understand why AO and Reichert didn't include an aperture in their fluorescence or metallurgical epi-illuminators. This is no exception, only a field diaphragm. The vignette is pretty bad. I'm not sure if this is due to the nikkor 200mm I used as a tube lens or the intermediates of the scope. The focusing mechanism is poor. And lastly(this isn't a design flaw) the light is not functioning so I used a weak led flashlight that made these 10s exposures.
In my opinion, the only benefit of DIC is reflected light is for examining very slight changes in depth. I personally prefer diffused dark field for most specimens.
I'd attempt a stereo pair but without a viewer I wouldn't be able to test it. I was actually considering buying one the other day. Do you know a good brand to buy?
I'm looking forward to seeing your bratcam DIC module. I'm sure it will be a smooth looking unit.
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rjlittlefield
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Nice demo of reflected DIC on a metallic surface!
--Rik
My favorite viewer and procedures are described HERE.curt0909 wrote:I'd attempt a stereo pair but without a viewer I wouldn't be able to test it. I was actually considering buying one the other day. Do you know a good brand to buy?
--Rik