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Old 16th January 2006, 04:10 PM   #11
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Fig. 1 - Projector Front View
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Old 16th January 2006, 04:10 PM   #12
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Fig. 2 - Projector Front View, bottom half open, upper half containing lens can also be lifted so that all elements inside can be adjusted
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Old 18th January 2006, 09:17 PM   #13
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Depending on queries in different forums, I have updated my following web page to include materials used by us and their sources of supplies, web resources on diy projectors and links to our threads in different forums:-
www.drtsolutions.com/Projector.htm
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Old 18th January 2006, 11:51 PM   #14
dracul is offline dracul  Brazil
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in Fig. 3 - Long throw lens assembly,

how is the lens secured to the wood inside. What I mean is when this mount is secured to the rest of the box you want to slide this entire mount away and towards the box to focus. In order to do this the mount show in figure 3 would have to lock the lens in that wooden hole. Another words the lens cannot slide withing the hole of the mount. These lenses dont have any mounting points. So how did you secure it there so it does not rotate or slide withing the hole?
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Old 19th January 2006, 12:10 AM   #15
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Dear Dracul,
While making the wooden assembly for the lens, the hole has been made for tight fit to the extent that the lens can be moved with hand with little pressure. It remains in the position due to gravity and friction.
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Old 27th January 2006, 12:39 AM   #16
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The innovative front opening is in two parts and adjustments can be carried out with the projection lens being in place. Now we are working on image sharpness and enhancements. Further details on these aspects may be seen by clicking the link below:-
http://www.drtsolutions.com/Projector.htm
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Old 6th February 2006, 11:17 PM   #17
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After the last post of 16th January, there were several queries and accordingly we have updated our web page. Visitors particularly new comers may be benefitted by our experience. The details may be seen at the following link to our web page:-
http://www.drtsolutions.com/Projector.htm
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Old 21st February 2006, 09:28 PM   #18
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After continuous interactions in four forums, we have now added a bowl reflector and reduced the distance between the bulb and fresnel lens till the brightness became uniform from corner to corner. The brightness also increased and is sufficient for dark viewing. We also added a front surface coated mirror which improved sharpness as well as brightness,
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Old 24th February 2006, 06:57 AM   #19
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On 24.02.06 we shot the following pictures of the screen 120" wide at 22 feet from the projector placed at ceiling height on an almirah. Wife Padma is standing before the screen. The pictures are quite bright and brightness can be further enhanced as it is at 50% default value of LCD. The digital camera is set at auto with ISO 50 setting. The reflector has been made out of a bowl which was got nickel plated.
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Old 24th February 2006, 07:00 AM   #20
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Further picture is as under
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