Δώστε ζωή στα μοντέλα σας και τις μακέτες σας με φωτισμό χρησιμοποιόντας FIBER OPTICS
Fiber Optics- Practical Application Tips
How does it work? Think of optical fiber as magical moving a piece of light from the source (a distant light bulb) to the point where you want it. To move hundreds of points of light to the exact places they are needed can easily be done, provided you do a little planing. These hints will help you successfully plan how to light your model using optical fiber.
Note: Wiese instructions may at first glance seem difficult, but do not despair. It is rather like trying to describe how to tie a knot without waiving your hands to aid the description process. Lighting with optical fiber is easy once you have done it.
The first design question when using optica1 fiber is "Where will the Light Come From?" Most models have an internal cavity. A small model can often hold a pen size flashlight, if the batteries can be replaced and the light turned on and off, the model will be able to be independent of at base. Another option for getting the light into the fiber is to have the bulb (halogen works well) in the cavity, with current wires running to the bulb through the supports. With large displays, such as architectural models, putting the light source in the base and running the fiber into the model works well. This allows for air flow to cool a more intense light source, as well as lighting several separate buildings at the same time.
Think about heat! If you run a 100 watt bulb in a box with out ventilation it is going to get hot. Provide ventilation if you plan to use more than 15 watts. For the best effect use a small bulb with the fiber abutted to the bulb. At temperatures over 80C the plastic fiber will slowly yellow, over 95C will soften and melt.
Having decided where the fiber is to be positioned cut more than the right length of fiber, a least a few inches on each end for handling. The fiber is easily trimmed, but is very hard to splice. Attach the fiber at the external end first, and gather the fibers into a loose bundle that terminates beyond the light source (this allows a working and handling length), The emitting end of the fiber, the one that is seen, can be trimmed flush with the face of the model, or left standing depending on the effect desired. Often this means drilling a hole for the optical fiber in your model. Position the fiber in the hole with an extra inch hanging out, glue the fiber and pull it through from the far side so the glue is pulled into the hole. When the glue is dry trim the fiber with a sharp knife.
Leave a bit of slack when tacking it down at the second end. This assures you that the fiber is not bearing any load or stressing the model. Group the inpUt ends together into a bundle, The fibers will accept more light if they are polished and do not cast shadows on each other, Trim the longest input ends with a knife. Loosely twist-tie it into a bundle with wire, tap the group end flat and tighten. Dip the bundle tip in clear epoxy so that it wicks up between the fibers. When dry sand with 440 grit paper or file the grouped end flat, and polish by rubbing on white bond paper or with extra fine jewelers rouge. It is common to have several separate bundles using the same light source.
Use two part epoxy rather than super glue or other one part glues! The solvent base of many one part glues dissolves the fiber. Test your glue on a piece of fiber before attaching to your model. (Devcon five minute epoxy works well, but if you have access to another type, try it first.)
Colored lights are made by tinting the incoming light. Use either colored cellophane or translucent paint. The lights can be made to blink different colors by passing a clear wheel between the fiber bundle and the light source. Paint the wheel with translucent colors to match the pattern of output you desire. Turn the wheel with a clock motor.
The fiber can be made to expand by heating it. The results vary with time and temperature, and a steady hand helps. By passing the end near a heat source (such as a soldering iron) it will contract in length and expand in diameter. The fiber will burn if you pass it through an open flame, so use caution.