Illumination – Photographic lighting – Heat responsive or control
Patent
1978-04-17
1980-01-08
Lechert, Jr., Stephen J.
Illumination
Photographic lighting
Heat responsive or control
362264, 362293, 355 71, G03B 1502
Patent
active
041830750
ABSTRACT:
Illumination system for photographic enlargers having a chamber mounted between the lamp and the negative aperture and consisting of heat-insulating, non-staining material of high light reflective and scattering power. In addition to the light entry and exit apertures, a further opening has a wall-segment inserted therein for cooling the mixing chamber and this wall segment consists of a material having a greater heat conductivity than the polyalkene foam.
REFERENCES:
patent: 3927941 (1975-12-01), Yamaguchi
Ernst Leitz Wetzlar GmbH
Lechert Jr. Stephen J.
Wells Gilbert L.
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