Article analyzer apparatus by silhouette projection

Details Article analyzer apparatus by silhouette projection Article analyzer apparatus by silhouette projection

1982-01-08

1985-02-05

Nelms, David C.

Optics: measuring and testing

For size of particles

2502222, G01N 1502

Patent

active

044975767

ABSTRACT:
Particle analyzer apparatus using the silhouette projecting method, comprising a fixed laser, a reflecting fixed cylinder of axis orthogonal to the direction of the incident laser beam, and adapted to send back the light towards and through a sheet of particled material, a light receiving device generating signals representative of the light received, means for processing the said signals and display means.
The receiving device may be constituted by a linear array of photodiodes, associated to a system for digitizing the projected silhouettes of the grit particles and for displaying same in the form of a television type image.
Said receiving device may also be constituted by a battery of lenses in the focal point of which are placed analog photoelectrical cells in order to generate signals representative of the covering power of the particles.

REFERENCES:
patent: 3712469 (1973-01-01), Dwyer et al.
patent: 3984154 (1976-10-01), Chin et al.
patent: 4075462 (1978-02-01), Rowe
patent: 4105925 (1978-08-01), Rossol et al.
Pfoutz "Digital Optics for Accurate Gaging", Instruments & Control Systems, vol. 49, No. 11, Nov. 1976, pp. 67-69.
Lehrer "A Fast, Non Contact Approach to Accurate Gauging", Instrument & Control Systems, vol. 49, No. 3, Mar. 1976, pp. 51-57.
Vorobev et al., "Determination of the Particle Composition . . . Contact Free Methods", Stroite'nye Materialy, Moscow, USSR, 1978, No. 7, pp. 17-18.

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