Optics: image projectors – Temperature control – Blower
Patent
1988-10-11
1990-03-27
Haroian, Harry N.
Optics: image projectors
Temperature control
Blower
353 66, G03B 2106
Patent
active
049108735
ABSTRACT:
An image projector is provided with increased light magnification through lenses positioned between the light source and the platen section of the projector. In addition to increased light magnification, increased image magnification is provided between the platen section and the mirror. Cooling air is directed separately over the light source and exhausted separately to dissipate additional heat generated with the increased magnification of light upstream and downstream from the platen section. The increased magnification and cooling air allows the clear projection of delicate items, such as photographs, which are otherwise not projectable by prior projectors.
REFERENCES:
patent: 1807614 (1931-06-01), Bauersfeld et al.
patent: 2047002 (1936-07-01), Cantwell
patent: 2818771 (1958-01-01), Armbruster
patent: 4721380 (1988-01-01), Gryglas
Haroian Harry N.
Livingston Edward M.
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