MicrobeHunter.com Microscopy Forum

One further note about eyepieces. There are two versions of Polyvar 10X/24 eyepieces, a WPK 10X/24 and WP 10X/24. Presumably with the WP , they have removed the .4% compensation from the eyepiece and put it elsewhere. It looks like the WP were for the Polyvar 2 and as a 20mm f.o.v. version the Polyl...

The 40X .70 Plan Fluor is based on a third generation system designed for the series 400 microscopes. The Plan Achro and Plan Fluor objectives in that program were all for interference contrast. Examples of working DIC Diastars for instance are fitted with standard Plan Achros and Plan Fluors. It se...

Probably. Titanium or Zirconium flint would have by then become the option and likely. BK 7 was ubiquitous but with a high refractive index, much like flint but lower dispersion it could only have been used as a direct replacement when a high degree of other juggling of the math occurred. Interestin...

https://patents.google.com/patent/US4373785A/en?inventor=arthur+shoemaker&oq=arthur+shoemaker&page=2 A second embodiment of the 100X Planapo Reichert objective patented in 1981. Essentially it is the same 8 cell , 13 element objective but with some changes in curvatures, radii, refractive index and ...

The scans are all very helpfull to fill in the gaps. Since you have 5 - 40X objectives, I am hoping you have the 40X .70 Plan Fl Apo . Since your plan is to avoid the use of immersion with your students I have found it one of the most perfect objectives for general use. Despite having only a modest ...

https://patents.google.com/patent/US365 ... ker&page=2

This would have been carried forward for the Polyvar.

https://patents.google.com/patent/US370 ... ker&page=2

This would have been carried forward for the Polyvar.

https://patents.google.com/patent/DE233 ... ker&page=3

This would have been carried forward for the Polyvar.

I did a little further checking. Arthur Shoemaker had two patents for 10X .25 Plan 34mm parfocal objectives. They are surprisingly different but achieve very similar goals. One is no doubt the cat.# 1021 and the other maybe the later cat.# 1127. No fluorite glass in either but the 1021 at least nudg...

I'd prefer to see the thicker, inside part of those jaws fully over the condenser barrel. Can you put a metric ruler or scale across the i.d. of the sleeve and see what you get as well. Not the caliper, a scale or ruler using the 10 as zero because sometimes that first mm on tapes/rulers are not acc...

Olympus , for some reason went back to an older condenser sleeve mount for those microscopes. It's anyone's guess why but imo , the reason is pretty transparent. Their previous mount was 36.8mm. I was just trying to confirm if they used the same as previous or have they used another dimension. If yo...

37mm sleeve?

Are the centering screws not integral to the condenser on those two CX's?

According to Leica HC objectives are not backwards compatable with Delta optics. Presumably this would mean that the two former systems would most likely be incompatible too. I don't know what the incompatability details are.HC and HCX are compatable, HCX and Delta are but not HC and Delta.

CX-41 uses 1.25 according to the manual but the CX-41 can accept other objectives. Aside from fit, there are height and focal length concerns with a condenser, plus it's capability to accept an aux. lens for very wide fields. The 31 and 41 are the same frame and illumination, are they not? I am wond...

I'm sorry but I wrote that really fast out of my noggin, which might have been sleep deprived and I meant CX. so just replace the B with a C. I'm pretty sure all else is accurate. Edited for accuracy now.

The diameter of the top lens of a condenser is indicative of the size of the field that it will illuminate, if other factors of condensers being compared remain the same. ; N.A., , whether either condenser also uses any auxillary lenses and the working distance from the object being viewed. The N.A....

Since low power Oil immersion with spot on peripheral or even central correction might be a challenge in the Polyvar, I thought that an overview of 10 and 20-25X objective working distances would be of value. I would think that it will take a 2mm w.d. to stay clear of the oil. Working distances of R...

Yes. and water and glycerin too. A concern in Rorschach's case, is finding an objective that equals the correction parameters of the other objectives in the system. I looked into the patent for the AO #1021 10X .25 advanced planachro objective and it gives an F.N. of 24, so it should be pretty well ...

AO/Reichert 580 : ~ .09 @ 6X
Bestscope BS 3090/Optika SZR 180 and others : .15 @ 13.5X

Yes, in terms of the myriad of brands and thus slight variations in design of any given class of objective but since the number of microscopic techniques has blossomed in the last 40 years or so, so has the mfg. of objectives with specific designs to suit unique applications. There are now only 1/10...

If you are looking for quality imaging to the periphery, I can't think of anything affordable but if you are just needing a scanning or search objective, putting an 11mm extension tube on several of the 34mm AO objectives would be an option. All of them have enough W.D. to not engage with the oil an...

Just the two dry 25X. A Plan ( Achro) .45 and Plan Apo .65 Any literature that I have seen says neither were IK but I know the .45 Plan existed as IK.The 25X Plan Apo is not a common objective. Certainly, using the 40X 1.0 oil planapo w./iris and 100X 1.32 oil planapo w./iris is a dream pair for DF....

Doesn't increasing L create a larger image at the tube lens as well as at the sensor plane? No, it does not. Peripheral light is lost but the magnification does not change. If we look at the geometry of the figure on the tube-lens calculation page, we see that light from a given single point of the...

No, the image size does not change. Otherwise, vignetting at the tube lens would not occur when L is very large, right? Thank you. Rays can be parallel but not all rays will be parallel with each other, nor parallel with the central axis. Thus the longer the infinity space the more rays escape the ...

The telan lens is placed in a fairly obvious location in the design in order for the accomodation of aux. components and ergonomics to be optimized, plus capture the ray bundle with minimal off axis variance , scatter, random interference , loss of peripheral rays and potential vignetting or diffrac...

Slurping up Paramoecium Caudatum and Amoeba Proteus singly with an eyedropper, to put on a slide. It became a sort of spectator sport.

I am always interested in anything that has to do with the Polyvar lineage, optics etc. :) I am not sure when the Polyvar 2 was introduced but I am pretty sure it was sometime after 1985. The Reichert U.S.A. Diastar was introduced in 1985 or 1986. The standard complement of objectives were planachr...