variable oblique filter

Here you can discuss different microscopic techniques and illumination methods, such as Brightfield, Darkfield, Phase Contrast, DIC, Oblique illumination, etc.
Post Reply
Message
Author
User avatar
legionair
Posts: 45
Joined: Tue Dec 13, 2022 1:29 pm
Location: Lommel-Belgium

variable oblique filter

#1 Post by legionair » Sun Jan 01, 2023 8:27 am

a simple to make variable oblique filter.it's no idea from myself but I found it a handy tool to share.

this slider comes at the location of the blue filter and can be shifted left and right to ajust the depht.it's made of a piece of a plasic cake box(it's the time of the year 😉 ) and some ductape,this can be any color.dimensions 30mm*x150mm.

*depending on your blue filter
Attachments
323408290_488926423413205_2579361635469326688_n.jpg
323408290_488926423413205_2579361635469326688_n.jpg (123.47 KiB) Viewed 2131 times

Chas
Posts: 422
Joined: Tue Jan 19, 2021 3:11 pm

Re: variable oblique filter

#2 Post by Chas » Sun Jan 01, 2023 2:23 pm

That is a very nice effect :-)
Roughly where in the system does this get placed? [Seems a stupid question, but I am not familiar with these microscopes]
I have looked in the Bresser manual but it doesnt really show or seem to mention the blue filter's position.

User avatar
legionair
Posts: 45
Joined: Tue Dec 13, 2022 1:29 pm
Location: Lommel-Belgium

Re: variable oblique filter

#3 Post by legionair » Sun Jan 01, 2023 2:42 pm

Chas wrote:
Sun Jan 01, 2023 2:23 pm
That is a very nice effect :-)
Roughly where in the system does this get placed? [Seems a stupid question, but I am not familiar with these microscopes]
I have looked in the Bresser manual but it doesnt really show or seem to mention the blue filter's position.
I hope this helps(I also didn't find it in the manual but had to find out myself)
Attachments
Untitled-2.jpg
Untitled-2.jpg (98.66 KiB) Viewed 2094 times

Chas
Posts: 422
Joined: Tue Jan 19, 2021 3:11 pm

Re: variable oblique filter

#4 Post by Chas » Sun Jan 01, 2023 3:14 pm

Ahh, thanks ...I thought that it might have special slot somewhere !
-Its nice that it works with swing out filter holders :-)

Sansub2
Posts: 101
Joined: Wed Oct 20, 2021 3:34 pm

Re: variable oblique filter

#5 Post by Sansub2 » Tue Jan 03, 2023 4:50 am

Thanks for sharing it. Simple and functional.

Sansub2
Posts: 101
Joined: Wed Oct 20, 2021 3:34 pm

Re: variable oblique filter

#6 Post by Sansub2 » Sat Jan 07, 2023 2:04 am

Legion air,

I took your idea a bit further. I realized that this can be expanded to produce the dic effect mentioned in the below link.

http://www.microscopy-uk.org.uk/mag/ind ... iydic.html

Here is the normal oblique slider.

Image20230106_203825 by San Sub, on Flickr

Here is 2 slider used to create below videos. The sliders are stacked together to create a blue oblique light on one side and white light from edge on the other side.

Image20230106_203756 by San Sub, on Flickr

10x - view it in 4k


40x


Off to create rheinberg filters :)

User avatar
legionair
Posts: 45
Joined: Tue Dec 13, 2022 1:29 pm
Location: Lommel-Belgium

Re: variable oblique filter

#7 Post by legionair » Sat Jan 07, 2023 8:05 am

Sansub2 wrote:
Sat Jan 07, 2023 2:04 am
Legion air,

I took your idea a bit further. I realized that this can be expanded to produce the dic effect mentioned in the below link.
Here is 2 slider used to create below videos. The sliders are stacked together to create a blue oblique light on one side and white light from edge on the other side.

(video's)

Off to create rheinberg filters :)
That's a smart idea!
Yesterday I tried a combInation of a (variable) darkfield filter and one of my flashlight filters that I placed directly over the lightsource.
dark.jpg
dark.jpg (225.48 KiB) Viewed 1833 times

Sansub2
Posts: 101
Joined: Wed Oct 20, 2021 3:34 pm

Re: variable oblique filter

#8 Post by Sansub2 » Sat Jan 07, 2023 8:59 pm

Looks nice. Combine them together or alone in oblique manner produces nice effect. I have multi color films as well and playing with it :). They produce nice image up to 20x. 40x is not good in my experiments.

Image20230107_134545 by San Sub, on Flickr

Post Reply