Quick Dukane OHP question

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4003

I have the 4003 here....

it has 2 switches on/off and the extra lightpush

the 4003 is the same as the infocus 410.
Dukane made them for Infocus and put that co's tag on it.
There is a slider to change from bulb to bulb without opening the projector, it contains 2 bulbs at the same time.

pretty good and very compact projector, one disadvantage though... because the projector is so compact, they had to cheat with some optics.
That is why they located the bulbs on the topside, they used a tilted mirror in order to reflect the light upwards. That mirror only serves when you open the bottom of the ohp and let it fall out... this results in opening the bottom of theprojector soo much that a lot of light leaks out and makes the room light. I did build a small screen made out of photopaperboard around the lightleaks, I did pay attention to the fan as it is essential to have a good airflow. One thing I am extremelysatisfied about is the fact that the glass/fresnel where the panel rests on, is extremely cool, not hot at all! saving the panel quite a bit!
Jean-Pierre
 
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