Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 1 (Q.No. 17)
17.
Diopter is the power of a lens having a focal length of
Discussion:
12 comments Page 2 of 2.
Er Meghanada (Bhadrak.Odisha) said:
8 years ago
Chromatic Aberration ? :
->For Single Lenses the focal length of blue light will be slightly shorter than that for red light is know as Chromatic aberration,
Spherical Aberration:
->In Real Spherical lenses these outer rays do not focus at exactly the same point because of spherical aberration,
F = Focal Length ,
P = 1/F power lenses.
1 diopter equal 100 c.m./1 m.
->For Single Lenses the focal length of blue light will be slightly shorter than that for red light is know as Chromatic aberration,
Spherical Aberration:
->In Real Spherical lenses these outer rays do not focus at exactly the same point because of spherical aberration,
F = Focal Length ,
P = 1/F power lenses.
1 diopter equal 100 c.m./1 m.
(1)
Rixu said:
6 years ago
@Sharad Sethi.
25 is the minimum sight distance to see an object clearly, don't get confused here with diopter.
25 is the minimum sight distance to see an object clearly, don't get confused here with diopter.
(1)
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