概要信息：

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(2) *	¿½þÿ½ØÓû‡ûã
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2 ¤ì^ä
1Ʋ9ÙN‡, -1ì, û‡†, ²¡º, 1&ÿC˜, ‡Å, ‹<Å
3 ¢n
¢X­ïÄÅFÙ¤û,^²1Ýp-1Š1
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Ú*	¶ÑƒàÃ
¡.
3.1 ü¿ÅFÙ¤û
éü¿ÅFÙ¤û,\1rOŽúª
Iθ = I0(
sinu
u
)2, u = πa
sin θ
λ
²L{‡©Û,ŒÙÌ4rÝ:
sin θ = ±1.43
λ
a
, ±2.46
λ
a
, ...
ƒAV« ˜:
sin θ = ±λ
a
,±2
λ
a
, ...
¦^1˜g4rOŽ¿°:
a =
1.43λ
sin θ′
≈ 1.43λ
∆X ′/Z
Ù¥∆X ′1˜g4r1˜Ì4r ˜ƒ,Zû‡1&ÿC˜&ÿµål
1
3.2 õ¿ÅFÙ¤û
éõ¿ÅFÙ¤û,\1rOŽúª
Iθ = I0(
sinu
u
)2(
sinNβ
sinβ
)2, β = πd
sin θ
λ
†þ¡ü¿ûƒ'õ
˜‡ZÏf,´duN‡°a,måd²1d¿ƒmZE¤,ùK

õ¿û1r©ÙÌ.¢|^Ì4rÿþ©OÿþV¿û¿°Ú¿må,¿°Óü¿û,¿°
¦^V«OŽ
a =
λ
sin θ′
≈ λ
∆X ′/Z
¿mådeª‰Ñ
d =
kλ
sin θ′
≈ kλ
∆X ′/Z
3.3 1rÝÿþ†1»‚ £Daì
¢æ^714+ÿ½1r,
û݌±ÏLÿþû¶þ^«ål5¼,¢¥¦^
1»‚ £Daì5ÿ½.Ӟ±o‡Ågě›ÚÿþÃã,¢yêâ1>=†,A/D=†Ýêiz
?n±9w«,‹<ÚäDѯõõU.
4 ¢SN
ÄkUì¢C˜«¿ãN!1´Ó¶p.©Oÿþü¿û1r©Ù¿ŠâêâOŽÑü¿°
Ý.,ÿþV¿1r©Ù,¿±dOŽÑV¿¿°Ú¿må.
5 êâL‚
5.1 ü¿û
Z = 59.08 cm
¸ (mm) ¸Š
Ì4r 0.925 2745
1˜g4r 4.855 12.975 144 135
V« 6.015 11.720
2
5.2 V¿û
Z = 60.58 cm
¸ (mm) ¸Š
Ì4r 14.795 1782
Ì4r1‡¸ 10.765 18.740 1051 984
ûV« 5.125 24.105
6 êâ?n9(J
6.1 ü¿û
1r©ÙXã:
Œ±OŽ¿°:
λ = 632.8 nm, ∆X ′ =
1
2
(12.975− 4.855) = 4.060 (mm)
a =
1.43λ
∆X ′/Z
= 131.7 µm
3
6.2 V¿û
1r©ÙXã:
Œ±OŽ¿°:
λ = 632.8 nm, ∆X ′ =
1
2
(24.105− 5.125) = 9.490 (mm)
a =
λ
∆X ′/Z
= 40.40 µm
ÏLÌ4rSÜZ^«måOŽV¿må:
k = 1, ∆X ′ =
1
2
(18.740− 10.765) = 3.988 (mm)
d =
kλ
∆X ′/Z
= 96.138 µm
7 ?Ø9g
g¢(¢°Ý,‡¦ü¿û¢¥,Ì4r1rI0†ü‡1˜g4r1rI1, I2A÷v
δ =
I1 + I2
2I0
∈ (4%, 5.5%)
±9
δ′ =
|I1 − I2|
(I1 + I2)/2
< 10%
‘\êâŒδ = 5.1%±9δ′ = 5.7%þÎ܇¦.
,˜¡,K´1´7L÷v™¶^‡
λ < ρ < 103λ
²y÷v.
4