Search found 16 matches

by urbanpiper3
Thu Aug 31, 2023 2:22 am
Forum: Microscopes and optics
Topic: Clones of Olympus MPlan 10x Metallurgical Objective (Industrial)
Replies: 1
Views: 7461

Clones of Olympus MPlan 10x Metallurgical Objective (Industrial)

I am in the lookout for cheaper clones (preferably Asian) to Industrial Metallurgical Olympus MPLN10X objective lens (45mm parfocality, 180mm tube lens compatible, Working distance > 8mm). https://www.olympus-lifescience.com/en/objective-finder/ I have tried at least 5 different companies so far and...
by urbanpiper3
Thu Aug 31, 2023 2:00 am
Forum: Microscopes and optics
Topic: Metallurgical (not life-science) 2x 45mm parfocal 180mm tube objective lens
Replies: 2
Views: 3073

Metallurgical (not life-science) 2x 45mm parfocal 180mm tube objective lens

Hi,

I am desperately looking for a material science/industrial upright microscopy objective lens with the following specs:

type: infinity
magnification: 2
tube lens focal length = 180mm

Please do suggest your options.

Cheers!
by urbanpiper3
Mon Jun 05, 2023 2:26 am
Forum: Beginner's corner
Topic: Image separation behavior in through-focus range of a microscope objective lens
Replies: 5
Views: 1219

Image separation behavior in through-focus range of a microscope objective lens

What might cause this behavior in a (low magnification 2x) objective lens. There seems to be a image separation in different axes as the object goes traverses through the focus plane (working distance plane) from one extreme to the other? Current theories: 1. Target is not orthogonal to optical axis...
by urbanpiper3
Sun Apr 16, 2023 6:30 pm
Forum: Microscopes and optics
Topic: 2x Metallurgical Objective (Tube 180mm)
Replies: 4
Views: 813

Re: 2x Metallurgical Objective (Tube 180mm)

Thank you @Scarodacctyl. I do have a 2.5x metallurgical objective as well from Olympus. It is a fantastic objective. I am designing my own 2x Brightfield (Reflected) objective but have a hard time finding a off-the-shelf 2x objective lens for comparison. I do have the Olympus PLAN 2x but it produces...
by urbanpiper3
Sun Apr 16, 2023 5:05 pm
Forum: Microscopes and optics
Topic: 2x Metallurgical Objective (Tube 180mm)
Replies: 4
Views: 813

2x Metallurgical Objective (Tube 180mm)

Hello all, I would like to purchase a reflected light 2x microscope objective. Olympus carries PLAN 2x objective for life-science applications (get a hot spot if you use it with reflected light) but not one for metallurgical use. Please suggest me a good 2x microscope objective that I can use on my ...
by urbanpiper3
Tue Jul 19, 2022 5:10 pm
Forum: Illumination Techniques
Topic: Reflected light Kohler Illumination
Replies: 7
Views: 2002

Re: Reflected light Kohler Illumination

The field lens is the element that distinguishes Kohler from critical illumination in practice. The irises are useful but secondary. Thanks for your comment. I agree that the field lens is the element that distinguishes Kohler from a critical illumination (nelsonian). But what exactly does the fiel...
by urbanpiper3
Mon Jul 18, 2022 12:27 am
Forum: Illumination Techniques
Topic: Reflected light Kohler Illumination
Replies: 7
Views: 2002

Re: Reflected light Kohler Illumination

Thanks to all for your comments. Having trouble finding a existing model of epi-illumination that can be built on workbench with off the shelf optics. Question(s): 1. The aperture stop should be conjugate to the objective BFP ? In most cases, especially with Chinese manufacturers this information is...
by urbanpiper3
Fri Jul 15, 2022 2:30 am
Forum: Illumination Techniques
Topic: Reflected light Kohler Illumination
Replies: 7
Views: 2002

Reflected light Kohler Illumination

I am unable to find any definite guide or reference for how to setup a kohler illumination design for a reflected light microscope. I am trying to build a reflected light microscope with off-the-shelf optics from Edmund Optics but have no idea where to look for a reference design to build a Kohler r...
by urbanpiper3
Fri May 06, 2022 1:10 am
Forum: Microscopes and optics
Topic: Metallurgical 2x objective 45mm parfocal design
Replies: 0
Views: 485

Metallurgical 2x objective 45mm parfocal design

I am looking for design references on a 45mm parfocal 2x metallurgical objective (WD > 6 at least) for a starting design. It seems difficult to get a design reference for low power microscope objectives. While there are so many copies and clones out there, I can't seem to find any resource for lens ...
by urbanpiper3
Tue Feb 22, 2022 1:42 am
Forum: Beginner's corner
Topic: Mathematical relations of a Modified Wollaston DIC prism and microscope objective
Replies: 3
Views: 1386

Mathematical relations of a Modified Wollaston DIC prism and microscope objective

What is the mathematical relationship between a Microscope objective's NA and Modified Wollaston Prism (Nomarski) DIC prism shear amount? What defines the shear amount in a DIC prism. Specifically in a reflective microscope design using a Nomarski prism. For instance, if the Rayleigh resolution of m...
by urbanpiper3
Mon Jan 10, 2022 3:12 am
Forum: Resources (online, books etc.)
Topic: Advanced Light Microscopy, Vol. 2 (Specialised Methods). By Maksymilian Pluta
Replies: 0
Views: 1380

Advanced Light Microscopy, Vol. 2 (Specialised Methods). By Maksymilian Pluta

Does anyone have a soft-copy for this book Advanced Light Microscopy, Vol. 2 (Specialised Methods). By Maksymilian Pluta ? ISBN:9788301078225, 8301078227 Page count:494 I would like to get a copy of this for my project and it has crucial information. Unfortunately this book is not available for purc...
by urbanpiper3
Mon Jan 10, 2022 1:02 am
Forum: Microscopes and optics
Topic: DIC Prism Design
Replies: 18
Views: 8628

Re: DIC Prism Design

Hello! Thanks for all the great discussion works on DIC Prism Design. I am having trouble getting a soft-copy/ hard copy from my local libraries. Can someone share the DIC design chapters from Advanced Light Microscopy, Vol. 2 (Specialised Methods). By Maksymilian Pluta ?? Or any other articles/ tex...
by urbanpiper3
Thu Nov 18, 2021 3:26 am
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 100
Views: 51131

Re: Epi DIC woes

Kind of a finishing note for me, but I got an Image of Distinction in the Nikon Small world contest this year for a shot taken with the new setup. I really do think the Olympus system could take excellent shots and there are only one or two circumstances where it would have issues--but since those ...
by urbanpiper3
Thu Nov 18, 2021 3:03 am
Forum: Microscopes and optics
Topic: DIC for reflected microscope
Replies: 4
Views: 1700

Re: DIC for reflected microscope

Thanks for your input. Please see these images taken at 10x and 50x Objectives with the same DIC prism (Part Number U-DICR from Olympus). Look at the quality of 10x image compared with the 50x, it looks like as shown https://postimg.cc/gallery/KypKPHs . As you can see, the 10x gives out a double ima...
by urbanpiper3
Mon Nov 15, 2021 6:22 pm
Forum: Microscopes and optics
Topic: DIC for reflected microscope
Replies: 4
Views: 1700

DIC for reflected microscope

Hello, I am new to interference contrast enhancement methods in microscopy, and in particular about DIC . I have the following setup in my lab and was interested to learn what exactly does Olympus mean by Shear amount. I could not find any online resources as to the specifications of the DIC optics ...