aspherical question

[trout]

Not really sure where to ask as it is a bike light I am doing .

I am building a couple of MCE bike lights and have been playing around
with a cheap aspheric lens from DX

so here goes do you need a reflector also when using aspherical lenses

I am wanting to have a moveable lens so i can go from piercing long range beam to wide flood for the different riding

If this is a rubbish idea then please say so I can abandon it.

Thanks

 

[saabluster]

Not really sure where to ask as it is a bike light I am doing .

I am building a couple of MCE bike lights and have been playing around
with a cheap aspheric lens from DX

so here goes do you need a reflector also when using aspherical lenses

I am wanting to have a moveable lens so i can go from piercing long range beam to wide flood for the different riding

If this is a rubbish idea then please say so I can abandon it.

Thanks

It would be rubbish with the reflector in there as well if that is your question. You could just leave it at max focus and then have a diffuser that could be put over it when you wanted flood. That would be a very easy way to do it any way. It is not common knowledge around here but I have done a lot of experiments and have gotten the reflector to work but it requires two things. The reflector needs to be as small as possible and you need to use a light diffusion material to blend it ever so slightly.

 

[trout]

Thank you Saabluster
That answers my question perfectly