08 the microscope condenser - for lighting and resolution
Вставка
- Опубліковано 30 сер 2014
- The microscope condenser is the often overlooked optical element of a microscope. But you ignore it at the peril of losing good illumination and best resolution. This video discusses the key points of the condenser and its use.
Part of the series Understanding and Using the Light Microscope - Наука та технологія
If you wish to understand condensers and iris diaghrams this is a great starter video. Ive watched it numerous times and it sums it up well
Thank you for a proper video. Got my first microscope and wanted to know what the hell a condenser was since i kept hearing about it.
Excellent overview of the condenser...Thank you for sharing your knowledge.
If the NA of a condenser is adjusted by opening/closing the diaphragm, how does this relate to the NA value which is printed on the condenser? Is this value the maximum possible NA for the condenser (the NA which is achieved when the diaphragm is 100% open)?
hello, interesting video, im triyng to learn how to make a homemade light condenser for my home made microscope...i alredy made one, but with out light condenser, it was no more than a powerfull magnifing glass.. i want more power, there is some diagram so i can figure to use some scrap from useless digital cameras, photocopier or sanner or old computer components.
thanks you
Apologies for the delay in replying. As a condenser you use any lens that will project an image of the LIGHT SOURCE EXIT APERTURE (NOT the light filament) onto the sample. How you do this is shown in my book's quick reference sheet on pages 8-9, available to see free here issuu.com/miltoncontact/docs/microscopy-booklet-issuu. The video 02 Best way to set up your microscope, also shows how to do this from about 5minutes 40 seconds onwards. The technique is called Köhler illumination and is described in Wikipedia here www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=kohler%20illumination.
These two guys (and this video) are great but I wish you had added two learners to the video. This poor girl is a little outnumbered here and I'd imagine that more good questions would come from one or two more learners--they might not feel so intimidated.
Good point Prometheus! Fortunately the girl is my daughter and normally it is she who is quite capable of intimidating me :-) I hope that the video was still useful as the condenser is really a critical part of getting the best images, resolution and brightness wise.
Having questions from more people is a good idea and I would have to give it some thought about how to stage the scene and film it.
If you are interested, this is what we actually did. The 8 videos in the session were all recorded on one day in a special studio we hired. Mot of it was actually impromptu once we had decided on the subject for a video. The set-up was deliberately kept simple with characters and material. I'd start the filming, and Lewis would start explaining based on his extensive and deep knowledge and past experience in teaching. Louise had no idea what he was going to say so her reactions and questions were true reactions. I'd butt in occasionally if a point needed to be mentioned. It was exhausting but we had great fun and a minimum of retakes!