Un-Split Optics
From Lumenlab
- page was renamed from Simple Optics
For the best image quality the LCD should have nothing between it and the triplet. The design in fig 2 is perhaps the easiest projector to build and the projection is quite good if attention is paid to optical alignment. In this case the glass ‘isolation’ plate (2) is to isolate the lamp’s heat from the LCD module (4). Most consumer grade LCD modules have an upper temperature limit of 105ºƒ (check your specs) so care must be made to ensure the panel doesn’t overheat. We will discuss cooling system design later.
As you can see from area A, much of the available light is ‘wasted’. But it some of it can be gathered with the use of a spherical reflector, which isn’t shown in the fig below, (see split optics) The lamp used in this design is the Lumenlab lamp, available from the Lumenlab store.
1. Light source Lamp
2. Tempered glass ‘isolation’ plate, 1/8” thick
3. 2 Fresnel lenses: a) 220mm FL collimator (condenser) and b) 317mm FL collector (field). Or, Pro fresnels a) 220mm FL collimator (condenser) and b) 650mm FL collector (field).]
4. LCD module, 15” (See ["Compatible Monitors"] or the Forums for a comprehensive database of usable panels)
5. Projection Lens: S15 Projection Lens Triplet 60mm clear diameter, 320mm FL. Or, Pro Projection Lens Triplet 100mm clear diameter, 500mm FL.
6.Screen
A. Wasted Light
B. Light path
Continue to Split Optics or go back to Light Flow.
