The Next Big Thing, or, Back To The Future

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
wporter
Posts: 353
Joined: Wed Oct 21, 2015 10:18 pm
Location: United States

The Next Big Thing, or, Back To The Future

#1 Post by wporter » Mon Nov 05, 2018 9:47 pm

OK, ditch all of those pathetic little light sources: XBOs, HBOs, halogen, and especially those weak-kneed, new-fangled LED things! Below is the microscope light you all have been waiting for, languishing somewhere in an antique vendor's back room:

https://www.ebay.com/itm/VINTAGE-BAUSCH ... 1438.l2649


And, if you need the instructions:

https://www.ebay.com/itm/2-Bausch-Lomb- ... 1438.l2649


(Please, someone buy at least the instruction book, to post here. Looks like a hoot!)
Attachments
B&L arclamp instructions.png
B&L arclamp instructions.png (125.48 KiB) Viewed 5042 times
B&L arclamp.png
B&L arclamp.png (185.97 KiB) Viewed 5042 times

Hobbyst46
Posts: 4277
Joined: Mon Aug 21, 2017 9:02 pm

Re: The Next Big Thing, or, Back To The Future

#2 Post by Hobbyst46 » Mon Nov 05, 2018 10:28 pm

Sometimes a new very specific use is found for an archaic method, but I doubt that carbon arc lamps have any use besides a museum item.
If anyone thinks otherwise, then before actually turning on this lamp, take precautions against strong UV irradiation.

Bryan
Posts: 101
Joined: Mon Sep 17, 2018 11:31 pm

Re: The Next Big Thing, or, Back To The Future

#3 Post by Bryan » Tue Nov 06, 2018 12:31 am

It looks like it could blow your eyeballs out of the back of your head. :shock:

MichaelG.
Posts: 3976
Joined: Mon Apr 10, 2017 8:24 am
Location: North Wales

Re: The Next Big Thing, or, Back To The Future

#4 Post by MichaelG. » Tue Nov 06, 2018 6:57 am

Bryan wrote:It looks like it could blow your eyeballs out of the back of your head. :shock:
... and that appearance is not deceptive

http://edisontechcenter.org/ArcLamps.html

http://donklipstein.com/carbarc.html

MichaelG.
Too many 'projects'

Hobbyst46
Posts: 4277
Joined: Mon Aug 21, 2017 9:02 pm

Re: The Next Big Thing, or, Back To The Future

#5 Post by Hobbyst46 » Tue Nov 06, 2018 8:23 am

Thanks Michael for the link to interesting and enjoyable reviews of the history of carbon arc lamps. It puts some perspective into the plus and minus of early electric lamps in comparison to the gas, oil and coal devices.

MicroBob
Posts: 3154
Joined: Sun Dec 25, 2016 9:11 am
Location: Northern Germany

Re: The Next Big Thing, or, Back To The Future

#6 Post by MicroBob » Tue Nov 06, 2018 9:36 am

One of the members of our microscopy group once demonstrated an arc beam projection microscope. It used a thick glass filter against ir radiation and was able to project an acceptable image of ca. 0,8m diameter in a dimly lit room. A Zeiss projection microscope was the first big investment of our group ca. 100 years ago costing several thousand Deutsche Mark. This must have been an incredible sum at this time!

With the older carbon arc lamps you had to adjust the carbon sticks permanently by hand. Later they invented clockworks to advance the carbon sticks. One of our members first job as a teenager at the group meetings was exactly this tending of the projector lamp. :lol: This was in the late 1950s.

Bob

Post Reply