Abstract

A holographic lens is used in conjunction with a pulsed ruby laser for machining single and multiple spots on a 0.12-μm thin film of tantalum deposited on glass. Spot sizes as small as 14 μm have been obtained with hologram diffraction efficiencies as great as 30%. Imaging of two spots separated by 3.18 mm has resulted in the simultaneous machining of two 30-μm spots having equal intensity and spot shape. The resolution that has been obtained with the high powered laser and the observed durability of the dichromated gelatin holograms for very high energy densities are encouraging and suggest a number of possible applications.

© 1971 Optical Society of America

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References

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  1. L. H. Lin, Appl. Opt. 8, 963 (1969).
    [CrossRef] [PubMed]
  2. E. B. Champagne, “A Qualitative and Quantitative Study of Holographic Imaging,” Ph.D. Thesis, Dept. of Electrical Engineering, Ohio State University (July1967). University Microfilm No. 67-10876; see also J. Opt. Soc. Amer. 57, 51 (1967).
  3. L. H. Lin, BTL, private communication.

1969 (1)

Champagne, E. B.

E. B. Champagne, “A Qualitative and Quantitative Study of Holographic Imaging,” Ph.D. Thesis, Dept. of Electrical Engineering, Ohio State University (July1967). University Microfilm No. 67-10876; see also J. Opt. Soc. Amer. 57, 51 (1967).

Lin, L. H.

L. H. Lin, Appl. Opt. 8, 963 (1969).
[CrossRef] [PubMed]

L. H. Lin, BTL, private communication.

Appl. Opt. (1)

Other (2)

E. B. Champagne, “A Qualitative and Quantitative Study of Holographic Imaging,” Ph.D. Thesis, Dept. of Electrical Engineering, Ohio State University (July1967). University Microfilm No. 67-10876; see also J. Opt. Soc. Amer. 57, 51 (1967).

L. H. Lin, BTL, private communication.

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Figures (7)

Fig. 1
Fig. 1

(a) Recording geometry for constructing a hologram with two point sources. (b) Playback geometry for reconstructing a hologram of a point source with a plane wave.

Fig. 2
Fig. 2

Ruby laser configuration used to obtain a low moded output at a wavelength of 0.6943 μm.

Fig. 3
Fig. 3

Optical configuration for reconstructing a point source using a holographic lens.

Fig. 4
Fig. 4

Mode structure of the collimated beam as it emerged from the hologram. The large beam is the undiffracted radiation, and the small beam is the radiation that is diffracted by the hologram into a focused spot.

Fig. 5
Fig. 5

(a) Series of spots machined at various energy levels using a single spot hologram. (b) Enlarged view of the 14-μm spot which is the second spot from the right in (a). (c) Enlarged view of the 67-μm spot which is the spot at the left of (a).

Fig. 6
Fig. 6

Set of two spots machined simultaneously on thin film tantalum and separated by 3.2 mm.

Fig. 7
Fig. 7

(a) Enlarged view of the 30-μm focused spot shown on the right of Fig. 6. (b) Enlarged view of the 30-μm focused spot shown on the left in Fig. 6.

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