An Elementary Treatise on Geometrical Optics |
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Page x
... Eye - pieces . 140. Huyghens ' eye - piece . 141. Ramsden's eye - piece . 142. The erecting eye - piece . 143 , 144. Telescopes with compound eye - pieces . 145 , 146. Herschel's telescope . 147-149 . Newton's telescope . 150-153 ...
... Eye - pieces . 140. Huyghens ' eye - piece . 141. Ramsden's eye - piece . 142. The erecting eye - piece . 143 , 144. Telescopes with compound eye - pieces . 145 , 146. Herschel's telescope . 147-149 . Newton's telescope . 150-153 ...
Page 103
... eye - piece ( also corrected for chro- matic dispersion ) . The two lenses constitute an ordinary astronomical telescope . If therefore the rays from the prism be received on a telescope , by focusing the telescope we shall be able to ...
... eye - piece ( also corrected for chro- matic dispersion ) . The two lenses constitute an ordinary astronomical telescope . If therefore the rays from the prism be received on a telescope , by focusing the telescope we shall be able to ...
Page 116
... eye - piece excentrically diverging from the image formed by the object - glass . The images formed by the lenses of the eye - pieces are formed exactly as if the rays diverged from a real object , except that the rays from any point of ...
... eye - piece excentrically diverging from the image formed by the object - glass . The images formed by the lenses of the eye - pieces are formed exactly as if the rays diverged from a real object , except that the rays from any point of ...
Page 145
... eye - piece , to be described presently . It consists of two plano - convex lenses whose focal lengths are in the proportion of 1 : 3 , the plane surfaces being turned towards the object , and the lens of shorter focal length being ...
... eye - piece , to be described presently . It consists of two plano - convex lenses whose focal lengths are in the proportion of 1 : 3 , the plane surfaces being turned towards the object , and the lens of shorter focal length being ...
Page 157
Robert Samuel Heath. close to the eye - glass . The two lenses of an eye - piece are therefore separated by an interval . We have therefore five quantities at our disposal , namely , the four radii of curvature of the four surfaces of ...
Robert Samuel Heath. close to the eye - glass . The two lenses of an eye - piece are therefore separated by an interval . We have therefore five quantities at our disposal , namely , the four radii of curvature of the four surfaces of ...
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An Elementary Treatise on Geometrical Optics (Classic Reprint) R. S. Heath No preview available - 2016 |
Common terms and phrases
achromatic angle of incidence aperture apparent magnitude astronomical telescope axis B₁ called caustic centre circle coloured concave concave lens conjugate foci converge convex lens corresponding Crown 8vo denote direction distinct vision Edited emerge parallel emergent ray equal equation extreme pencils eye-glass eye-lens eye-piece field of view final image focal length focal plane glass Hence illuminated inches incident ray inclined infinity instrument k₁ lenses linear magnitudes luminous magnifying power meet nodal points normal object object-glass object-mirror P. G. Tait pair of conjugate perpendicular placed plane mirror point Q position principal focus principal plane principal points prism pupil radii radius ray of light rays diverging reflected rays reflexion refracting surface refractive index respectively retina right angles second medium seen small mirror spectrum sphere spherical surface subtended suppose tangent theorem triangles vertex visual angle
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