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Author Topic: Laser Alignment Kits Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 12-25-2009 03:13 AM                     Steve, all the Kinoton light projectors we've bought for fiml and DLP systems in the last 5 years or so have been green LED, and bright it is too! Jeremy I'd go and check mine, but it's in the back of the car under many feet of snow. Merry Christmas one and all  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-25-2009 09:19 AM                     I can believe that...ours is older than 5 years...I want to say it is from around 2000. I hope the LED puts as clear an image as the light bulb does. Steve  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 12-25-2009 10:26 AM                     Could someone explain what a "light projector" is and how it is used? Maybe a diagram or photo if not a few paragraphs? The laser alignment tools seem easy to understand... --jhawk  |  IP: Logged Jeremy Weigel Phenomenal Film Handler Posts: 1062 From: Edmond, OK, USA Registered: Mar 2007 posted 12-25-2009 01:34 PM                     quote: Pete Naples Jeremy I'd go and check mine, but it's in the back of the car under many feet of snow. I can relate to that. We received 14"+ with drifts as high as 5-6ft. My mustang got buried at work in a 3ft drift... I got all my employees out of there in time before the heaviest snow fall came in. Guess the captain always goes down with the ship...  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-25-2009 02:59 PM                     The Kinoton light projector "projects" a circular area of light onto the reflector (it mounts where the lens goes...just like a laser). The face of the light projector is flat. The light that comes back forms interference rings on the face of the projector. When the rings are circular and centered on the face, you have everything aligned. As you may know, I can not post the manual for it or I would. Next time I have it out, I'll try and snap a photo of it. Steve  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 12-26-2009 05:50 PM                        I happened to take a snapshot of the light projector in action the other day with my cell phone. The image quality is pretty basic, but it still gives you a rough idea what it looks like: What you see here is the light projector on the right, inserted in the lens collar, here of a DP70. On the side of the light projector, there are markings which show you how far to insert it into the lens collar for the two different types of Kinoton reflectors (300mm and 340mm) and which help you verify the correct working distance. This only works with Kinoton lamphouses, with other lamphouses you have to move the light projector forward and backward to find a good spot in which you can see the concentric circles. In some positions further away from the relfector, the image typically collapses slowly and the edges start forming an X mark on the front of the light projector. The green LED is indeed very bright, so the image here is washed out by it, but in real life, the rings can be seen very clearly. You can also typically see a rectangular shape which is the light coming through the aperture. If the reflector is correctly adjusted, you can see all this centered around the opening in the middle of the front of the light projector which is where the light from the LED comes out of. Once this is done, there is another useful application for it with lamphouses in which the xenon lamp sits on an adjustable anode support post, e.g. Strong lamphouses. A very common mistake is that this post is not properly adjusted vertically, and sometimes, you also have to turn them very slightly to achieve the best horizontal alignment. Often, people just use the bulb focus control plate in the back of these lamphouses to make up for that, and then everything gets progressively more out of alignment. The bulb focus control plate should be more or less perfectly centered and only used for minor finetuning adjustments. If you look at a lamphouse which is set up so that the plate is not close to its centered position, you immediately know there are other problems. When you put in the xenon lamp with the light projector still in the lens holder, you can actually see a small bright ball of green light floating in the lamp. This is the light from the green LED which is concentrated by the reflector in its focal point where in operation, the plasma ball at the tip of the cathode will be. So if you adjust the front bulb support and the lamp focus so that the green ball of light is sitting completely centered on the tip of the the cathode, then you have almost perfect lamp alignment. Then you just back the lamp up a bit because during operation, the plasma ball where most of the light comes from is burning right in front of the tip. If you then remove the light projector, install the lens and switch on the lamphouse, you immediately have nearly perfect lamphouse alignment, with typically only very minor finetuning necessary at that point.  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 12-27-2009 02:42 AM                     Couldn't have put it better myself, cheers Michael!  |  IP: Logged David E. Nedrow Master Film Handler Posts: 368 From: Columbus, OH, USA Registered: Oct 2008 posted 12-29-2009 12:29 AM                        Is the Align-O-Tron still sold? Source?  |  IP: Logged

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