Philosophical MagazineTaylor & Francis., 1879 - Physics |
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Page 263
... aperture had then the effect of bringing the smaller star into a more favourable position for detection ; but in general the advantage of increased aperture was very appa- rent even when attended by considerable aberration . The ...
... aperture had then the effect of bringing the smaller star into a more favourable position for detection ; but in general the advantage of increased aperture was very appa- rent even when attended by considerable aberration . The ...
Page 406
... aperture giving an extreme aberration of from a quarter to half a period , and that with an increased aperture aberration is not so much a direct cause of deterioration as an obstacle to the attainment of that improved definition which ...
... aperture giving an extreme aberration of from a quarter to half a period , and that with an increased aperture aberration is not so much a direct cause of deterioration as an obstacle to the attainment of that improved definition which ...
Page 411
... aperture . Taking the greatest admissible value of has equal to 1 , we shall see that of must not exceed the value given by δf = λα - 2 . ( 18 ) As a practical example , we may take the case of a single lens of glass collecting parallel ...
... aperture . Taking the greatest admissible value of has equal to 1 , we shall see that of must not exceed the value given by δf = λα - 2 . ( 18 ) As a practical example , we may take the case of a single lens of glass collecting parallel ...
Contents
FIFTH SERIES | 1 |
JULY 1879 | 17 |
Mr F Guthrie on the Fracture of Colloids Plates II III | 33 |
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