A PRACTICAL EXAMPLE AFTER GAUSS i 1 5 



sured from A ; P'= principal point measured from B 

 3 ] 3 



-~~- 1 E = 2 _I - 2 - ' /" ] ^ 1 =_ 1 - 

 3 ~3 ' ' r' ~ IT" 2 



' 



( > \ 7 f 7 l 19 

 /< (u a) a u u' = +/"= o = 1'583 



1 1 



- V 



d u' 22 3 



"12 



= A + -158 . (i) 



1 2 



P / =B + ^-^- 5 _ ? = B +~|= B-^ 



"12 



= B -21 . /ii) 



3 



^L p 18 

 15- -19 

 "12 



(iii) 

 3 



y/ = p /_ M _ p , L. = p' + ! 8 



12 



=P'+-947 . (iv) 



9 

 Lens No, 2 : Data. Radius C = 8==/ - ; radius 1) = x = /': 



1 8 



f ", /"',/'"; thickness = ]0 =</ ; ^ = - ; Q = principal point 



measured from C ; Q'=priiicipal point measured from D. 



8 -l 8 --l 



., 1 r; g , ( 1 r 



~8 



64 ^1 8 



~75 - " 7"> 



>=( ( + 9 



75 



i 2 



