Thread replies: 5
Thread images: 2
Thread images: 2
File: Parabolrinne_2.jpg (175KB, 800x600px) Image search:
[Google]
175KB, 800x600px
I have LEDs with an viewing angle of 120°. For my application i d like to reduce that to 60-80°. There is a solution but it involves buying clips and reflectors for each led. This would further blow up the costs by 100 bucks.
As the application will have the LEDs aligned in a strip i was thinking of using a parabolic trough like in pic related (only narrower).
With a circular parabolic mirror i can understand the reflection pattern but the trough gives me a hard time anticipating it because of the added Z-axis.
>>
>>1137027
Parabolic trough will focus the led strip spread across the width of the trough. How much depends on the geometry of the trough and mounting of the LED strip. The beam will not be focused along the axis of the trough, so the beam will spread at 120 degrees in this plane.
>>
>>1137129
What about the rays between the axis of the trough and the cut section? I have no clue how to calculate this..
>>
Make the LED strip pass through a lengthwise slit a short distance away.
>>
File: 1374030538947.jpg (537KB, 2048x1224px) Image search:
[Google]
537KB, 2048x1224px
Oh I see, gonna start growing some lord of the rings pipe stuffing?
Thread posts: 5
Thread images: 2
Thread images: 2