Register to reply

Optic lens to collimate/focus light from a LED.

by David_woo
Tags: collimate or focus, lens, light, optic
Share this thread:
David_woo
#1
Jan4-13, 10:50 AM
P: 2
Hello.

I'm looking for a lens that can collimate (or focus far away >500mm ) a light coming out from a LED.

before I give more details is this even possible?

Thanks.
Attached Thumbnails
focucer.jpg  
Phys.Org News Partner Physics news on Phys.org
Vibrational motion of a single molecule measured in real time
Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field
Bubbling down: Discovery suggests surprising uses for common bubbles
Integral
#2
Jan4-13, 12:12 PM
Mentor
Integral's Avatar
P: 7,318
Take a pick, do you want it collimated or focused?
David_woo
#3
Jan4-13, 01:07 PM
P: 2
if the focused focal is far away it doesn't matter, I just looking for divergent/convergent angle smaller to 1 degree.

but if you want a pick lets said collimator.

Integral
#4
Jan4-13, 01:53 PM
Mentor
Integral's Avatar
P: 7,318
Optic lens to collimate/focus light from a LED.

A point source at the focal distance of a lens will produce a parallel beam out. So you want a 10-30mm focal length lens.

You need the thin lens equation.


Register to reply

Related Discussions
How big should a lens be to focus enough light to reach 1000 Celcius? General Physics 2
Contact Lens: How to focus light 1mm away General Physics 2
Lens can focus the light to a smaller spot by ...? General Physics 3
Question on light intensity at the focus of a lens. General Physics 2