Abstract

An unusually short close-up imaging system about 8.5 cm (3⅜ in.) long has been developed for document copiers, oscilloscope cameras, and computer peripheral hard-copy cameras. Arrays of simple lenses are molded in rows and columns on two parallel plastic lens plates. Each lens on the first lens plate forms a demagnified, inverted, intermediate image of a small area of the object in the space between lens plates. Each lens in the second plate erects and magnifies an intermediate image and places the resulting final image in partially overlapped registration with adjacent images, forming an erect uniform composite image of the whole object.

© 1979 Optical Society of America

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References

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  1. J. P. C. Southall, Mirrors, Prisms and Lenses (Dover, New York, 1964), p. 405.
  2. G. A. Boutry, R. Auerbach, Instrumental Optics (Interscience, New York, 1962), pp. 299, 300.
  3. R. H. Anderson, Optical Apparatus Including a Pair of Mosaics of Optical Imaging Elements, U.S. Patent RE 28,162 (1974).

Anderson, R. H.

R. H. Anderson, Optical Apparatus Including a Pair of Mosaics of Optical Imaging Elements, U.S. Patent RE 28,162 (1974).

Auerbach, R.

G. A. Boutry, R. Auerbach, Instrumental Optics (Interscience, New York, 1962), pp. 299, 300.

Boutry, G. A.

G. A. Boutry, R. Auerbach, Instrumental Optics (Interscience, New York, 1962), pp. 299, 300.

Southall, J. P. C.

J. P. C. Southall, Mirrors, Prisms and Lenses (Dover, New York, 1964), p. 405.

Other

J. P. C. Southall, Mirrors, Prisms and Lenses (Dover, New York, 1964), p. 405.

G. A. Boutry, R. Auerbach, Instrumental Optics (Interscience, New York, 1962), pp. 299, 300.

R. H. Anderson, Optical Apparatus Including a Pair of Mosaics of Optical Imaging Elements, U.S. Patent RE 28,162 (1974).

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Figures (9)

Fig. 1
Fig. 1

The images are restored to an upright position by undergoing a second inversion.

Fig. 2
Fig. 2

Parallel optical trains viewing the same object have a characteristic plane of coincidence in which their images are in registration with each other.

Fig. 3
Fig. 3

The shortest system and the three systems shown below it do not fully cover the object field when stacked in an array.

Fig. 4
Fig. 4

The basic components of the lens-array camera include three different types of apertured baffle-plates.

Fig. 5
Fig. 5

The system is a special case in the theory of stops in which two entrance pupils occur.

Fig. 6
Fig. 6

The composite-image demagnification due to the converging axes must match the demagnification of each lens-pair.

Fig. 7
Fig. 7

Lens plates and baffle plates stacked together with spacers make a typical initial test setup.

Fig. 8
Fig. 8

The first fully developed lens-array oscilloscope camera has a demagnification of ×0.87 and diagonal rows of lenses.

Fig. 9
Fig. 9

Good uniformity and resolution are achieved in a typical oscilloscope waveform photograph.

Equations (3)

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M I = H I C D = T S - Δ Y 2 T S + Δ Y 1 = T S - T H ( R Q - T S R T ) T S + T C ( R Q - T S R T ) .
M n = ( N R ) / ( R C ) · ( T H ) / ( N T ) .
N R R C · T H N T = T S - T H ( R Q - T S R T ) T S + T C ( R Q - T S R T ) .

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