?? ??(optical glass)??. ? ?? ??? ??? ??? ??? ??????,

1
?? ??
??? ??? ? ??? ??? ?? ???? ??? ?? ??? ??? ??
??(optical glass)??. ? ?? ??? ??? ??? ???
??????, ? ??? ??? ? ?? ??? ?? ??? (refractive
index) ? ?? ??(dispersion number) ??. ??? ??
???? ?? ?? ? ?? ???, ??? ? ?? ?? ? ???.
??? ??? ?? ???? ??? ?? ??? ??(dispersion) ?? ??,
?? ???? ??? ??? ???? ???? ??? ?? ??????.   ??
??? ?? ?? ?(Abbe number) ? ??. ??? F, C, d ?? ??
????? ? ??? ?? ?? ?? ??? ??? ????.
                                                  
              
2
??? ? ??? ????? ????? ??? ???? ??? ?? ? ??. ???
??? ??? ?? Glass Table?? ??.
?? ??
3
(No Transcript)
4
Aberration
??? ????

• ??(Aberration)??
• Ray ?? Wavefront? Thin Lens Formula?? ???? ??

• 2? ??? ???? ?? ??? ?? ??? ??
• ??? ??, ??? ??, ?? ?? ?? ???
• ??? ???? ???? ??? ?

????, ???? ????, ???? ????, ???
5
????(Spherical Aberration, SA)
??? ?? ????? ??? ??
??? ??? ?? ?? ??
6
??? ??? ???
7
Episode with the Hubble Space Telescope
?? ?? ?? ?? ??? ???
8
???? (Comatic Aberration)
Java

• Comatic aberrations are similar to spherical
  aberrations, but they are mainly encountered with
  off-axis light fluxes.
• The magnification changes with the distance from
  the optical axis.
• Shapes like a Comet ! ? COMA
• Aperture size dependent

9
???? (Comatic Aberration)
10
????(Astigmatic Aberration)

• ???? ????? ?? ???? ??? ?? ??
• tangentially (meridionally) or sagitally
  (equatorially).

11
Astigmatism