Darkfield and Reinberg filters

Write test posts here. This is the place to experiment with the forum. I may delete the contents from time to time.
Post Reply
Message
Author
dale carter
Posts: 18
Joined: Sun Jul 26, 2020 12:56 pm

Darkfield and Reinberg filters

#1 Post by dale carter » Mon Jul 27, 2020 11:00 am

Hi, I was trying to find some blank glass disks to use as filters for my microscope that would be cheap, thin and tough enough. I went to a Watchmaker and bought the watch face disks (in my case 32mm diameter) as you can see from the photographs. With these disks I was able to use those round labels from the stationary store as well as cutting disks from insulation tape to build the desired dark field and Reinberg filters as shown. This really works well as shown in the cyclops photograph.
Attachments
Photo_Cyclops_SS_30th_ISO_200_AT_150X.jpg
Photo_Cyclops_SS_30th_ISO_200_AT_150X.jpg (59.94 KiB) Viewed 7467 times
darkfield.jpg
darkfield.jpg (115.39 KiB) Viewed 7467 times
darkfieldcircles.jpg
darkfieldcircles.jpg (61.88 KiB) Viewed 7467 times
reinbergfilters.jpg
reinbergfilters.jpg (86.69 KiB) Viewed 7467 times

User avatar
janvangastel
Posts: 533
Joined: Mon Dec 03, 2018 7:05 pm
Location: Huizen, Netherlands
Contact:

Re: Darkfield and Reinberg filters

#2 Post by janvangastel » Mon Jul 27, 2020 11:40 am

Nice filters and a nice effect.

User avatar
Maryfox
Posts: 57
Joined: Fri Jan 04, 2019 5:10 pm
Location: Florida, USA

Re: Darkfield and Reinberg filters

#3 Post by Maryfox » Mon Jul 27, 2020 12:45 pm

Thanks for posting this. I am currently trying to psych myself up to make these filters. Watching Microbehunter's video on them gives me encouragement and I love your examples.

BramHuntingNematodes
Posts: 1536
Joined: Tue Jan 21, 2020 1:29 am
Location: Georgia, USA

Re: Darkfield and Reinberg filters

#4 Post by BramHuntingNematodes » Mon Jul 27, 2020 12:47 pm

Can't argue with those results! Esslinger sells a large variety of watch face glass in fractional mm sizes for a pretty reasonable price, if anyone wonders where to find such a thing online.
1942 Bausch and Lomb Series T Dynoptic, Custom Illumination

DrPhoxinus
Posts: 316
Joined: Mon Jan 28, 2019 5:17 pm
Location: Rochester Hills, MI

Re: Darkfield and Reinberg filters

#5 Post by DrPhoxinus » Mon Jul 27, 2020 1:56 pm

They can be found on eBay

However I just check and for a number of sellers the 32 mm size is out of stock


Gerard

User avatar
Maryfox
Posts: 57
Joined: Fri Jan 04, 2019 5:10 pm
Location: Florida, USA

Re: Darkfield and Reinberg filters

#6 Post by Maryfox » Wed Jul 29, 2020 1:57 pm

I just now ordered from Esslinger: 8 watch glasses: 32mm, 1mm thick @$1.25 each. Shipping via USPS first class $3.63
The website says that they may be back ordered on some items, but does not specify which ones. At that price I can wait a while if necessary.
Last edited by Maryfox on Wed Jul 29, 2020 6:37 pm, edited 2 times in total.

perrywespa
Posts: 112
Joined: Mon Jun 15, 2020 9:13 pm
Location: Georgia

Re: Darkfield and Reinberg filters

#7 Post by perrywespa » Wed Jul 29, 2020 3:38 pm

What a great idea to use watch faces. I had cut some out of old CD cases, what a chore! And thanks for the Esslinger source. Just ordered some 31mm and can't wait to try some Rheinberg filters!
Perry
Insatiably curious.

User avatar
Maryfox
Posts: 57
Joined: Fri Jan 04, 2019 5:10 pm
Location: Florida, USA

Re: Darkfield and Reinberg filters

#8 Post by Maryfox » Wed Jul 29, 2020 6:39 pm

Update to previous post:
Three hours after I placed my order with Esslinger I have received an email that my order has shipped.. WOW

EYE C U
Posts: 288
Joined: Wed Jul 15, 2020 5:18 pm

Re: Darkfield and Reinberg filters

#9 Post by EYE C U » Tue Sep 22, 2020 2:37 am

I came across these too..i wondered if anyone here tried them ..but you beat me too it..10 32mm for 5 bucks ..on the way now ;-)..

i'm thinking i'll machine a 32mm x 1/2mm deep pocket on my spin table head that they can sit in..then i can paint on any kind of circle :)

Greg Howald
Posts: 1183
Joined: Tue Oct 20, 2020 6:44 am

Re: Darkfield and Reinberg filters

#10 Post by Greg Howald » Fri Oct 23, 2020 2:38 am

Thanks so much for this. I've made many dark field and reinberg filters using flat clear plastic which is pretty flimsy. Never would I have thought of watch face lenses.
What a really good idea. Thanks for sharing.
Greg

Post Reply