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Author Topic: Periscopic projection Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 04-08-2005 05:15 PM                     Aerial images created in space are usually the work of image condensers or optics to "relay" the image you want to focus on to a different location than the source ( film plane / image on a tube face ). An example on my animation stand I have a lens condenser to pick up the image from a slide or movie projector that is about 0.5 meter from the animation stand top. The image is focused on the condenser so the camera optics can focus on the image "in space". We worked with a 70mm dome show lens which used a camera optic to project the image....this required a set of optics to create an aerial image about 400 mm ahead of the film plane so the camera optic could focus on the image. These systems require high precision with all points collimated or you have light loss, poor image quality...most cinemas would be hard pressed to keep a system maintained. The dome lens was an example...it was cost effective compared to two - three other lenses available but the relay optics absorbed light to the point that the lens was an F/4 which required more lamphouse wattage to compensate and operators would sometimes bump the front portion of the lens enough to knock it out of collimation = image problems.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 04-10-2005 11:37 AM                       quote: Richard Fowler An example on my animation stand What stand do you have, Richard?  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 04-10-2005 12:53 PM                     It is a custom stand based on Mechanical Concepts design. Besides normal x/y/z/ controls horizontal travel is three feet to handle special backgrounds. We had the unit set up until last year and is temporarily stored in out office until we move it to a new location with enough height. My smaller title stand with limited movement I recently sold to a studio and they are converting it to a digital scanner for artwork. With computers and programs such as Toonz and Maya, I am the prehistoric guy in regards to the stands. Justin, our computer animator, bangs out two - three 10 second clips a day on Maya but he has noticed on on simple set ups the stands where up to speed in creating an end product.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 04-10-2005 01:05 PM                       I didn't know you were into filmmaking. Do you have any of your work online? Btw, I use Animo and Toon Boom for 2D stuff -- Maya, Bryce, and Carrara for 3D. You mentioned the stand so I wondered if you were using it somehow. Great!  |  IP: Logged

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