Camera module and portable terminal
A camera module includes a lens module including a plurality of lenses having refractive power, a first optical path folding unit disposed on the object side of the lens module and configured to refract or reflect incident light in an optical axis direction of the lens module. Among the lenses constituting the lens module, an effective radius of a lens closest to the first optical path folding unit may have substantially the same size as an effective radius of an exit surface of the first optical path folding unit.
1. A camera module comprising:
a lens module; and
a first optical path folding unit disposed on an object side of the lens module and configured to refract or reflect incident light in an optical axis direction of the lens module,
wherein 1.0<PRh/LES1<1.10, where PRh is a maximum effective radius of an exit surface of the first optical path folding unit and LES1 is a maximum effective radius of a lens closest to the object side in the lens module.
2. The camera module of claim 1 , wherein the first optical path folding unit comprises an antireflection layer disposed thereon.
3. The camera module of claim 2 , wherein the antireflection layer is disposed on one or both of an incident surface of the first optical path folding unit and the exit surface of the first optical path folding unit.
4. The camera module of claim 2 , wherein the antireflection layer comprises a plurality of protrusions.
5. The camera module of claim 2 , wherein the antireflection layer comprises:
a first antireflection layer disposed on an incident surface of the first optical path folding unit and including a first protrusion; and
a second antireflection forming layer disposed on the exit surface of the first optical path folding unit and including a second protrusion.
6. The camera module of claim 5 , wherein the first protrusion and the second protrusion have different sizes.
7. The camera module of claim 5 , wherein a formation gap of the first protrusion is different from a formation gap of the second protrusion.
8. The camera module of claim 1 , wherein at least one or more of lenses constituting the lens module are configured to have different sizes in a first direction and a second direction intersecting an optical axis.
9. The camera module of claim 1 , wherein the lens module comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially disposed from the object side of the lens module.
10. The camera module of claim 9 , wherein the first lens, the third lens and the fifth lens have a positive refractive power, and
the second lens and the fourth lens have a negative refractive power.
11. The camera module of claim 9 , wherein at least four of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens have a convex object-side surface.
12. The camera module of claim 9 , wherein at least three of the first lens, the second lens, the third lens, the fourth lens, and fifth lens have a concave image-side surface.
13. The camera module of claim 1 , further comprising a second optical path folding unit disposed between the lens module and an image plane.
14. The camera module of claim 13 , wherein a second antireflection layer includes a protrusion and is disposed on one or both of an incident surface of the second optical path folding unit and an exit surface of the second optical path folding unit.
15. A portable terminal comprising the camera module according to claim 1 .