■ Calculation List for Focused Range

.
kind of probe The curvatures and focusing depth(mm) of element
fre-
quency		 element angle of refraction SA
 (R30)		 SB
(R50)		 SC
(R70)		 SD
(R100)		 SG
(R150)		 SE
(R200)		 SH
(R250)		 SF
(R300)		 SI
(R350)		 SJ
(R400)		 SK
(R500)		 SL
(R800)
2 20 A45 　 ~23 ~31 ~40 ~47 　 　 　 　 　 　 　
25 　 　 ~35 ~49 ~64 22~73 24~79 　 　 　 　 　
30 　 　 　 21~52 27~75 31~90 33~101 35~109 37~115 38~121 　 　
40 　 　 　 　 37~83 45~110 51~132 56~149 59~164 62~176 66~194 　
50 　 　 　 　 44~81 56~113 65~142 73~170 80~193 85~214 94~248 　
75 　 　 　 　 48~67 67~100 83~134 98~167 112~201 124~233 145~295 190~450
5 10 3.5~13 5.5~21 7~26 7.6~30 　 　 　 　 　 　 　 　
15 6~13 10.5~25 13.5~36 17~48 20~62 22~69 24~75 　 　 　 　 　
20 　 13~24 18~37 24~55 31~80 35.5~97 39~110 41~119 43~126 45~133 　 　
25 　 　 21~35 29~55 40~86 48~112 52~134 58~151 61~165 64~177 68.5~194 　
30 　 　 22~32 32~52 46~86 57~117 65.5~145 72.5~170 78~191 83~210 90.5~240 104~293
2 20 A60 　 　 　 ~22 ~27 　 　 　 　 　 　 　
25 　 　 　 ~27 10.5~36 12~41 13~45 　 　 　 　 　
30 　 　 　 10.5~29 14~42 16~51 18~58 19~62 20~66 20.5~69 　 　
35 　 　 　 12~29 17~45 20~58 22.5~68 24.5~75 26~81 27~85.5 29~93 　
40 　 　 　 13~28 19.5~46.5 24 ~62 27.5~75 30~85.5 32.5~94 34~101 37~112 　
50 　 　 　 13.5~24.5 22~44 29~63 35~80.5 40~96 43~110 46~122 51.5~142 60.5~178
5 10 　 3~12 3.5~14 4~17 　 　 　 　 　 　 　 　
15 　 5.5~14 7.5~21 9.6~28 11.5~36 12.5~40 13~44 　 　 　 　 　
20 　 　 9.5~21 13~31 17~46 20~56 21.5~63 23~69 24~73 25~77 　 　
25 　 　 11~19.5 16~31 22.5~49 27~65 30~77 33~88 35~96 36.5~103 39~113 　
30 　 　 11~17 17~29 25.5~49 32~67 37~84 41~98 44~111 47~122 51.5~139 59.5~170
2 20 A70 　 　 　 　 3~14 　 　 　 　 　 　 　
25 　 　 　 　 5~18.5 6~21 3~23.5 　 　 　 　 　
30 　 　 　 　 7~21 8~26.5 9~30 9.5~32 10~34 10.5~36 11~38.5 　
35 　 　 　 　 8~23 10~30 11.5~35 12.5~39 13~42 13.5~44.5 14.5~48 　
40 　 　 　 　 9.5~23.5 12~32 13.5~38.5 15~44 16~48.5 17~52 18.5~58 　
50 　 　 　 　 　 14.5~32.5 17.5~41.5 20~49.5 22~57 23.5~63.5 26~74 31~93
5 10 　 1.5~6.5 2~8 2~9 　 　 　 　 　 　 　 　
15 　 2.5~7.5 3.5~10.5 4.5~14.5 5.5~18.5 6.5~21 7~23 　 　 　 　 　
20 　 　 5~10.5 6.5~16.5 9~24 10~29 11~33 12~36 12.5~38 13~40 　 　
25 　 　 5.5~9.5 8~16 11~25.5 13.5~33.5 15.5~40 16.5~45.5 18~50 18.5~53.5 20~59 　
30 　 　 　 8.5~15 13~25 16~34.5 19~43.5 21~51 22.5~57.5 24~63.5 26.5~72.5 30.5~89
2 25 N 　 　 15.5~28.5 18.5~39 22.5~52.5 24.5~62 26~68 27~73 28.5~77 　 　 　
30 　 　 17~28 21.5~40 27~58 31~72 33.5~82.5 35.5~91 37~97 38.5~102 40.5~110 　
35 　 　 18.5~27 24~40 31.5~60 36.5~78 40.5~93 44~104.5 46~114.5 49~122 52~135 　
40 　 　 19.5~26 26~39 35~60.5 41.5~80.5 47~98 51~114 55~127 58~138 62.5~157 70.5~190
45 　 　 　 27.5~38 37.5~60 46~81 52.5~101 58~119 63~135 66.5~150 73~174 84.5~220
50 　 　 　 　 40~59 49~80.5 57~101.5 64~121 69.5~140 74.5~157 83~187 98.5~249
75 　 　 　 　 46~53.5 59~74 71~96 82.5~117 92.5~139 102.5~160 120~203 159~320
100 　 　 　 　 　 　 　 90.5~109 10.5~103 116~151 139~194 198~324
5 10 　 8~18.5 9.5~23 10.5~27.5 11.5~31.5 　 　 　 　 　 　 　
15 　 12~20.5 14.5~28.5 17.5~38.5 21~50.5 23~59 24~64 25~68.5 26~72 　 　 　
20 　 14~19 18~28 23~40.5 29~59.5 33~75 36.5~87 38.5~96.5 40.5~104 42~110 44.5~119 　
25 　 　 20~27 26.5~40 35~61 41.5~81 47~98 51~114 54.5~127 57.5~137 62~156 69.5~187
30 　 　 　 28~37.5 39~59.5 47.5~81 55~101 61~120 66.5~138 70.5~154 78~181 91.5~235
35 　 　 　 29.5~36.5 41.5~58 52~80 61~101 69~122 76~142 82.5~161 92.5~196 113~273
40 　 　 　 30.5~35 43.5~56 55.5~77 66~99 75.5~121 84~142 91.5~163 105~202 133~300
　
　
 
 

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