Suppression of color fringing in lamps

Details Suppression of color fringing in lamps Suppression of color fringing in lamps

1976-08-23

1978-07-11

Moses, Richard L.

Illumination

Light source and modifier

Including reflector

F21M 300, F21P 500

Patent

active

041005945

ABSTRACT:
In a beam-projecting lamp such as a vehicle headlamp or theatre spotlight which has a mask to delimit the edge of the beam, color fringing due to the mask is reduced by the use of a mask having separate front and rear edges or by splitting the projection lens into upper and lower halves, the arrangement in each case producing both a virtual erect mask image from one half of the projection lens and a real inverted mask image from the other half.

REFERENCES:
patent: 3914593 (1975-10-01), Laribe
patent: 3949214 (1976-04-01), Jones et al.
patent: 3955077 (1976-05-01), Jones et al.
patent: 3999056 (1976-12-01), Faulhaber

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