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Problems using desktop lamp as light source

 
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dragonblade



Joined: 18 Oct 2014
Posts: 154

PostPosted: Wed Apr 25, 2018 8:53 am    Post subject: Problems using desktop lamp as light source Reply with quote

Normally, I use my microscope's built-in LED light source. The problem is that it's a very small light source. Not really an issue with the 40x objective because the field of view is so narrow. However, when it's used with the 4x and 10x objectives, the lighting is uneven. This is worse with the 4x objective due to the wider field of view.

Recently, Ive been doing some experimenting with a desktop lamp and newly purchased globe in combination with the microscope's mirror. Without a slide in place, the lighting is quite bright and even generally. However, not quite as bright as I would like when used with the 40x objective. Other than that, not too bad. Unfortunately, the results are pretty poor as soon as I add a slide. The lighting provided by the desktop globe becomes so much dimmer. And part of the image is blurry. And when using the 4x objective, half of the field of view looks like it's in shadow. Overall, the image through the microscope is of very poor quality.

Though things are fine when I switch back to the built-in LED light source (except for the uneven lighting with the 4x and 10x objectives.)
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GaryB



Joined: 29 Jul 2016
Posts: 521

PostPosted: Fri May 11, 2018 4:46 am    Post subject: Reply with quote

It would be helpful if you could post a photo of the setup as you are using it, then it may be possible to narrow down what may be going wrong. Also, what wattage and type is the bulb, LED? Frosted? distance from mirror? Again, pictures would help.

To narrow down the problems we need more info than the symptoms. Relaying problems with no frame of reference to work from is difficult which is where pictures help, preferably as you've been using it with lamp and mirror.
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