|
|
Consider a ray parallel to the optic axis falling on the system. Then for the reflection on the first surface,
 /v1 - 1/ = ( -1)/R
After the reflection,
v2 = -v1
And for the 2nd refraction out of the lens,
1/v3 - /v2 = (1-)/R
v3 = R/2(-1)
which is the focal length
|
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
388
