Apparatus for testing the quality of a sheath of the polyethylen

Details Apparatus for testing the quality of a sheath of the polyethylen Apparatus for testing the quality of a sheath of the polyethylen

1993-09-20

1995-07-04

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503581, 2503591, G01N 2101, G01N 2188, G01N 2189

Patent

active

054302960

ABSTRACT:
An apparatus for testing the quality of a sheath of the polyethylene type on a test piece based on the transparency of polyethylene to infrared radiation. The apparatus includes a glass tank (5) containing a bath (4) of refractive index that is close to the refractive index of polyethylene, a test piece (1) received in the tank, a lighting assembly (11) for illuminating the test piece by a light beam (12) of limited aperture angle (a) passing through a light-diffusing screen (10) having narrow diffusion lobes, and an infrared detection assembly (15, 16) for detecting the beam passing through the test piece. The apparatus may be applied for testing the sheaths on splice boxes and on repeater casings.

REFERENCES:
patent: 2922887 (1960-01-01), Jacobs
patent: 3629584 (1971-12-01), Blomgren, Jr.
patent: 4208126 (1980-06-01), Cheo et al.
patent: 4363966 (1982-12-01), Cheo
patent: 4550255 (1985-10-01), Sve et al.
patent: 4988875 (1991-01-01), Ortiz et al.
Oriel Catalog, `Optics and Filters`, vol. III, pp. 4-7.
Cheo, P. K. "Far-infrared Laser System for Detection of Defects in Polyethylene-Insulated Power Cables", Optical Society of America, vol. 2, No. 2, Feb. 1978 pp. 42-44.

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