<!-- from fixya rte -->White spots or dots on the image problems - Office Equipment & Supplies

1,white spots appeared on screen,means the DMD chip is broken,you need a new DMD chip.we supply the DMD chip

We supply original projector parts: lamp, bulb, Lcd panel, Lens, DMD chip, color wheel,
motherboard, powersupply ... with high quality and competitive price.
Jerry
Lampdeng Limited

This is a dlp projector and has a bad DMD chip. Most models are very similar. Here is a video of a similar repair.

I have been having the same problem with a Canon camcorder photo mode. 1st try cleaning the lens in case there are spots on it showing up in resulting images. 2nd, add more lighting to the subject, direct overhead if possible, or adjust the white balance to match the lighting situation, rather than using automatic white balance.

Sounds like the monitor is going.

If you focus the image on a screen up close to the projector and notice small rectangular black and white spots, then you have pixel failures.

It's not a problem with your NV monocular. These spots will occur on any image intensifier tube. EXAMPLE: Military standard states that if more than one black spot appears on the tube, then this image tube is rejected for use by the US Military Now like you NewCon Optik DN 140M it manufactured in Russia and they quality control doesn't even match the US Military Standards. On scale 1 to 10; US Military rating for the image tube would be 10+ while the Russian maybe 2+ and I said maybe. Another thing to remember here is that no two image intensifier tubes are the same. It just like finger prints on people not two are the same. It normally. stewbison

I have the same problem. I think we need a class action!

http://s1231.photobucket.com/upload/albums/m3231/?location=projector+spots

Does the camer have a removable lens. Is it an SLR camera. If so, there probably is microscopic dust on your sensor, or you have some dead pixels on your sensor. If you can get to the sensor, you can easily clean it with a cleaning kit. The most effective way of cleaning is to blow it off with clean air. Be gentle. On an SLR it is necessary to lock the mirror up. Your instruction book will explain how to do that. For more suggestions, Google cleaning my camera sensor and you will get a lot of suggestions. :-)

Are these dots moving with image or stationary under a moving image. This is a key identifier

Ensure focusing is spot on. if your image is a black dot surrounded by white light (like a doughnut) then your not in focus. Look at making a Hartmann Mask (really easy, just google for it), which fits over the front lens. It has 2 or more holes in it,this means when you look through the eye piece you will see double images, adjust focus until the images merge into one (if the images go further apart turn the focuser the other way), when they are merged remove the mask and presto you should be in optimum focus. Always remember telescopes are very sensitive and focussing requires delicate adjustments.
Regards and Clear Skies
Carl