Difference between revisions of "File:Lens construct.gif"

Revision as of 22:28, 7 January 2006

Construction of image points for the parallax situation. Parallel rays, focal rays and center ray are shown:

0₁ and 0₂: Object points 1 and 2
I₁ and I₂: Image points 1 and 2
F and F': Focal points 1 and 2
P and P': Principal planes (both in identical position)
The object distances o₁ and o₂ are the distances from the object positions 0₁ and 0₂ to the principal plane P (not shown in image)
The image distances i₁ and i₂ are the distances from the image positions I₁ and I₂ to the principal plane P' (not shown in image).
The focal length f and f' are the distances from the focal points F and F' to the principal plane P (not shown in image). Both focal length are identical if the medium on both sides of the lens is identical (air, in our case).

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-Construction of image points for the parallax situation
+Construction of image points for the parallax situation. Parallel rays, focal rays and center ray are shown:
+* '''0<sub>1</sub>''' and '''0<sub>2</sub>''': Object points 1 and 2
+* '''I<sub>1</sub>''' and '''I<sub>2</sub>''': Image points 1 and 2
+* '''F''' and '''F'''': Focal points 1 and 2
+* '''P''' and '''P'''': Principal planes (both in identical position)
+* The object distances '''o<sub>1</sub>''' and '''o<sub>2</sub>''' are the distances from the object positions '''0<sub>1</sub>''' and '''0<sub>2</sub>''' to the principal plane '''P''' (not shown in image)
+* The image distances '''i<sub>1</sub>''' and '''i<sub>2</sub>''' are the distances from the image positions '''I<sub>1</sub>''' and '''I<sub>2</sub>''' to the principal plane '''P'''' (not shown in image).
+* The focal length '''f''' and '''f'''' are the distances from the focal points '''F''' and '''F'''' to the principal plane '''P''' (not shown in image). Both focal length are identical if the medium on both sides of the lens is identical (air, in our case).