Abstract

Spot size and peak intensity of a light spot focused by a GRIN rod lens using a collimated laser-diode beam were measured as a function of the amount of defocus and of lens tilt. Assuming only primary spherical aberration, the wave aberration of the GRIN lens was estimated by diffraction theory taking the presence of aberrations into account. In a point-to-point imaging system, the spot size was measured as a function of the distance between lens and light source.

© 1984 Optical Society of America

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References

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  4. K. Iga, Appl. Opt. 19, 1039 (1980).
    [CrossRef] [PubMed]
  5. T. Yamagishi, K. Fujii, I. Kitano, Appl. Opt. 22, 400 (1983).
    [CrossRef] [PubMed]
  6. K. Fujii, H. Ueno, T. Yamagishi, in Technical Digest, Topical Meeting on Gradient-Index Optical Imaging Systems (Japan Society of Applied Physics, Kobe, 1983), paper E4.
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    [CrossRef] [PubMed]

1983

1980

1970

Born, M.

M. Born, E. Wolf, Principles of Optics (Pergamon, New York, 1959), Chap. 9.

Fujii, K.

T. Yamagishi, K. Fujii, I. Kitano, Appl. Opt. 22, 400 (1983).
[CrossRef] [PubMed]

K. Fujii, H. Ueno, T. Yamagishi, in Technical Digest, Topical Meeting on Gradient-Index Optical Imaging Systems (Japan Society of Applied Physics, Kobe, 1983), paper E4.

Herriott, D. R.

Iga, K.

Ishihara, S.

Kikuchi, K.

Kitano, I.

Kubo, T.

McKenna, J.

Miyazawa, T.

Nishizawa, K.

Okada, K.

Rawson, E. G.

Shimada, J.

Shimizu, H.

Tomlinson, W. J.

Ueno, H.

K. Fujii, H. Ueno, T. Yamagishi, in Technical Digest, Topical Meeting on Gradient-Index Optical Imaging Systems (Japan Society of Applied Physics, Kobe, 1983), paper E4.

Wolf, E.

M. Born, E. Wolf, Principles of Optics (Pergamon, New York, 1959), Chap. 9.

Yamagishi, T.

T. Yamagishi, K. Fujii, I. Kitano, Appl. Opt. 22, 400 (1983).
[CrossRef] [PubMed]

K. Fujii, H. Ueno, T. Yamagishi, in Technical Digest, Topical Meeting on Gradient-Index Optical Imaging Systems (Japan Society of Applied Physics, Kobe, 1983), paper E4.

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Figures (8)

Fig. 1
Fig. 1

Illustration using a GRIN lens in an optical disk pickup: 1, actuator; 2, collimator lens; 3, laser diode: 4, beam splitter; 5, quarterwave plate; 6, cylindrical lens; 7, photodetector.

Fig. 2
Fig. 2

Schematic diagram of the measuring system of focusing properties.

Fig. 3
Fig. 3

Spot size (open circle) and peak intensity (closed circle) on the optical axis. Broken line indicates the calculation of Eq. (3). B corresponds to the primary spherical aberration.

Fig. 4
Fig. 4

Intensity profile at best focus

Fig. 5
Fig. 5

Coordinates of the diffraction system.

Figure 6
Figure 6

The spot size and the peak intensity vs. GRIN lens-tilt.

Fig. 7
Fig. 7

Point-to-point imaging optics.

Fig. 8
Fig. 8

Spot size of the light focusing device shown in Fig. 7.

Tables (1)

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Table I Physical Properties of the GRIN Lens Employed Here

Equations (6)

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2 w = 5.16 2 π × λ N . A . ,
Z = - π λ f 2 z ,
C ( Z , ρ , B ) + i S ( Z , ρ , B ) = 2 π 0 a exp i [ Z r 2 + k B ( r a ) 4 ] J 0 ( 2 π λ f ρ r ) r d r ,
I ( Z , 0 , B ) = C ( Z , 0 , B ) + i S ( Z , 0 , B ) .
1 X + 1 L = 1 f .
2 w = 5.16             λ f L π             2 a ( L - f ) .

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