I have this idea for a theatrical effect but I've become concerned about its safety the more I learn about lasers. I thought it would be a much better idea to discuss possible options on here before I try something stupid and blind myself.
The idea is pretty simple. There would be a high power laser on a moving head which would have two sets of diffraction grating wheels with several different shapes and patterns. The laser would ideally be a diode (for low maintenance) with enough power to be seen without any fog/haze and with a fair amount of ambient light.
Alright first question... I've taken apart a couple star field laser effects and they use a piece of stationary diffraction grating glass and an identical piece rotating directly infront of it to create a spinning, crossing array of beams. If you placed a diffraction grating of dots (lets say in a circle) infront/behind a piece that projected a star would you get a circle of stars or would you get a circle of pieces of a star?...
Secondly and most importantly... How can I shine just the laser beam, or the beam through one layer of diffraction, or through two layers of diffraction into an audience without causing damage?
I absolutely love the clean line lasers make but it's not worth anyones eyesight and a lawsuit. Would I be better off using a different light source with a collimated lens and a prism and sacrifice the thin, clean beam?
I want to avoid using any kind of lamp which leaves me with laser/LED diodes and I'm not sure I can get enough punch out of LEDs to get a similar effect...
Ideas?
The idea is pretty simple. There would be a high power laser on a moving head which would have two sets of diffraction grating wheels with several different shapes and patterns. The laser would ideally be a diode (for low maintenance) with enough power to be seen without any fog/haze and with a fair amount of ambient light.
Alright first question... I've taken apart a couple star field laser effects and they use a piece of stationary diffraction grating glass and an identical piece rotating directly infront of it to create a spinning, crossing array of beams. If you placed a diffraction grating of dots (lets say in a circle) infront/behind a piece that projected a star would you get a circle of stars or would you get a circle of pieces of a star?...
Secondly and most importantly... How can I shine just the laser beam, or the beam through one layer of diffraction, or through two layers of diffraction into an audience without causing damage?
I absolutely love the clean line lasers make but it's not worth anyones eyesight and a lawsuit. Would I be better off using a different light source with a collimated lens and a prism and sacrifice the thin, clean beam?
I want to avoid using any kind of lamp which leaves me with laser/LED diodes and I'm not sure I can get enough punch out of LEDs to get a similar effect...
Ideas?