Issue with UST projectors

Dear all,

UST (Ultra Short Throw) projectors are not very common in the flight simulator community (and we normally don't use it!). But they are ideal when you have a very limited space and you need a very large picture und you can only provide a very small distance between projector and wall.

Vivitek DH758UST

We are using a Vivitek projector and we are really happy with it. Amazing peace of technique. This projector has an external mirror to enable this extremely wide picture.

Unfortunately we had to learn that this mirror is deforming when the projector heats up. you cannot see this only with your eyes and normally this would not matter at all. But within a warping environment this causes lots of troubles as you can see on the video. The picture will change during warm-up. And unfortunately also during normal operation. It seems that it "breathes". In every case it's not possible to get a constant exact blending.

 

We don't write this to blame Vivitek. But we know that our blog is read by a lot of people and some of you adapt our ideas for their home cockpits (which is great!). We will live with that behavior but we thought we should spend a little time to inform you about this quite unusual issue.

 

The video shows a loop of the first 20 minutes after lighting the projector. Look closely when the loop starts from the beginning.

 

 

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