1. Range from Focus Based on the work of Eric Krotkov And Jean Paul Martin

2. Problem statement

3. Problem statement cont.

4. Theory of Defocus

5. The Optical Transfer Function

6. Wave Aberation

7. The Object plane, the image plane and the pupil planes

8. The Wave aberation QQ

9. A different choice of reference system for wave aberation

10. Notation

11. The displacement of the detector plane is = to introduction of wave aberation by amount

12. In terms of the amount of defocus

13. Figure 2. Cross-section of the OTF of a defocused incoherent system

14. Focus Quality

15. Focus criterion functions

16. Focus criterion functions cont.

17. Implementation

18. Search Strategy

19. Fibonacci search technique

20. The search Algorithm

21. Computing the range

22. Thin lens geometry

23. Computing the range

24. Algorithm

25. Limitations

26. The effect of depth of field

27. Focus data

28. Range errors