Holographic device for obtaining a coded image of an object emit

Details Holographic device for obtaining a coded image of an object emit Holographic device for obtaining a coded image of an object emit

1976-12-15

1979-03-27

Stern, Ronald J.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250321, 250363S, 350162ZP, G03H 108, G03B 4116

Patent

active

041462955

ABSTRACT:
The invention provides a holographic device for X-ray or .gamma. ray imaging, especially for tomography in the medical field, in which low frequencies of radiation can be included in the image construction by virtue of having a mask with a particular transmittance law.
For example the transmittance law of the mask may be such that transmittance is a function of x.sup.2 +y.sup.2 or of .sqroot.x.sup.2 +y.sup.2 where x and y are spatial co-ordinates of the mask.

REFERENCES:
patent: 3829688 (1974-08-01), Barrett
patent: 3961191 (1976-06-01), Stoner et al.
Barrett et al., Optical Engineering, vol. 13, No. 6, Dec. 1974, pp. 539-549.
Miles, Applied Optics, vol. 7, No. 5, May 1968, pp. 976-977.
Barrett et al., Optical Engineering, vol. 12, No. 1, Feb. 1973, pp. 8-12.
Singleton et al., IEEE Transactions on Biomedical Engineering, vol. BME-23, No. 3, May 1976, pp. 239-246.

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