I have some students that are working on a project where they need a fairly small, focused beam of light. The beam will need to be fairly focued with no spillover ( not too knowledgeable with the technical verbage ), and will need to be strong enough to activate a light sensor over the span of about 20 feet. The focus of the beam needs to be pretty small ( an inch diameter or possibly even less would be ideal ).
They were using a laser beam to do the job, but are no longer allowed to use that as an activator as it has been deemed unsafe for usage in this project by the administrators.
Budget is definietly a concern as they are not allowed to spend a lot of money.
Is there a type of flashlight that will achieve this? and also is it possible to shape the beam into a square or a semi-circle once they have the light source?
Help!
They were using a laser beam to do the job, but are no longer allowed to use that as an activator as it has been deemed unsafe for usage in this project by the administrators.
Budget is definietly a concern as they are not allowed to spend a lot of money.
Is there a type of flashlight that will achieve this? and also is it possible to shape the beam into a square or a semi-circle once they have the light source?
Help!