Abstract

The Fresnel zone of optical gratings—the region behind the grating where secondary interference between the light coming through the different openings produces real images of the grating—can be understood by comparison with other types of wave phenomena. In the Fresnel zone of light diffracted by an optical grating, different types of amplitude modulation of the wave front are observable. Gratings of stationary ultrasonic waves, being phase gratings to the light passing through them, produce similar, though not identical Fresnel patterns. Between the planes in which the secondary interference patterns are true images of the gratings, the modulation changes from amplitude to phase modulation. This change can be demonstrated by an ultrasonic wave analog. Patterns formed by the diffraction of ultrasonic waves by an amplitude grating are given. Similar patterns in surface waves are given for both the phase grating and the amplitude grating analog.

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Bachem, Ch.

H. Falkenhagen and Ch. Bachem, Z. Elektrochem. 41, 570 (1935).

Bär, R.

R. Bär, Helv. Phys. Acta 8, 591 (1935).

Falkenhagen, H.

H. Falkenhagen and Ch. Bachem, Z. Elektrochem. 41, 570 (1935).

Hiedemann, E.

E. Hiedemann and E. Schreuer, Z. Physik 107, 463 (1937).

E. Hiedemann, Ergeb. exakt. Naturw. 14, 219 (1935).

E. Hiedemann and K. Osterhammel, Proc. Indian Acad. Sci. 8, 275 (1938).

Menzel, C.

E. and C. Menzel, Optik 3, 247 (1948).

E. and C. Menzel, Optik 4, 22 (1948).

Nath, N.

N. Nath, Proc. Indian Acad. Sci. 4, 262 (1936).

C. Raman and N. Nath, Proc. Indian Acad. Sci. 3, 119 (1936).

Nomoto, O.

O. Nomoto, J. Phys. Soc. Japan 2, 41 (1947).

O. Nomoto, Proc. Phys.-Math. Soc. Japan 19, 337 (1937).

O. Nomoto, Proc. Phys.-Math. Soc. Japan 18, 402 (1936).

Osterhammel, K.

E. Hiedemann and K. Osterhammel, Proc. Indian Acad. Sci. 8, 275 (1938).

Parthasarathy, S.

S. Parthasarathy, Proc. Indian Acad. Sci. 4, 55 (1936).

Pisharoty, P.

P. Pisharoty, Proc. Indian Acad. Sci. 4, 27 (1936).

Raman, C.

C. Raman and N. Nath, Proc. Indian Acad. Sci. 3, 119 (1936).

Rayleigh, Lord

Lord Rayleigh, Phil. Mag. 11, 196 (1881).

Schreuer, E.

E. Hiedemann and E. Schreuer, Z. Physik 107, 463 (1937).

Talbot, H.

H. Talbot, Phil. Mag. 9, 401 (1836).

Wolfke, M.

M. Wolfke, Ann. Physik 38, 385 (1912).

M. Wolfke, Ann. Physik 37, 96 (1912).

M. Wolfke, Ann. Physik 34, 277 (1911).

M. Wolfke, Ann. Physik 39, 569 (1912).

M. Wolfke, Ann. Physik 37, 797 (1912).

M. Wolfke, Ann. Physik 40, 194 (1913).

Zernike, F.

F. Zernike, Physica 1, 689 (1934).

F. Zernike, Physik. Z. 36, 848 (1935).

Other

Lord Rayleigh, Phil. Mag. 11, 196 (1881).

H. Talbot, Phil. Mag. 9, 401 (1836).

M. Wolfke, Ann. Physik 34, 277 (1911).

M. Wolfke, Ann. Physik 37, 96 (1912).

M. Wolfke, Ann. Physik 37, 797 (1912).

M. Wolfke, Ann. Physik 38, 385 (1912).

M. Wolfke, Ann. Physik 39, 569 (1912).

M. Wolfke, Ann. Physik 40, 194 (1913).

F. Zernike, Physica 1, 689 (1934).

F. Zernike, Physik. Z. 36, 848 (1935).

E. and C. Menzel, Optik 3, 247 (1948).

E. and C. Menzel, Optik 4, 22 (1948).

E. Hiedemann, Ergeb. exakt. Naturw. 14, 219 (1935).

O. Nomoto, Proc. Phys.-Math. Soc. Japan 18, 402 (1936).

O. Nomoto, Proc. Phys.-Math. Soc. Japan 19, 337 (1937).

H. Falkenhagen and Ch. Bachem, Z. Elektrochem. 41, 570 (1935).

S. Parthasarathy, Proc. Indian Acad. Sci. 4, 55 (1936).

E. Hiedemann and E. Schreuer, Z. Physik 107, 463 (1937).

N. Nath, Proc. Indian Acad. Sci. 4, 262 (1936).

C. Raman and N. Nath, Proc. Indian Acad. Sci. 3, 119 (1936).

P. Pisharoty, Proc. Indian Acad. Sci. 4, 27 (1936).

R. Bär, Helv. Phys. Acta 8, 591 (1935).

E. Hiedemann and K. Osterhammel, Proc. Indian Acad. Sci. 8, 275 (1938).

O. Nomoto, J. Phys. Soc. Japan 2, 41 (1947).

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