Flat top beam shaper optics?

[nikosb]

Are there any optics for LEDs that would produce a narrow top-hat like beam like shown below?

I looked for TIR lens but they ones that I found adjust only the FWHW angle while keeping a Gaussian like beam profile.

 

[znomit]

An Aspheric lens will do that... it basically projects an image of the LED die, so you get a tight square beam.

http://www.candlepowerforums.com/vb...-headlamps-)&p=3590586&viewfull=1#post3590586

 

[Optical Inferno]

Have a look at back lighting optics from Ledil and Carclo. They tend to smooth the lambertian profile that most LEDs emit. I think the optic from Ledil is the Emerald and I'm not sure what the one from Carclo is. Think you can order both from Digikey.