Optical: systems and elements – Lens – With variable magnification
Patent
1991-04-23
1992-07-21
Howell, Janice A.
Optical: systems and elements
Lens
With variable magnification
359831, 362336, 362337, 362338, B60Q 102
Patent
active
051328470
ABSTRACT:
The invention relates to a motor vehicle headlight glass suitable for being mounted in a position where it slopes relative to a vertical plane, and being of the type that comprises a plurality of stripes for the purpose of spreading the light emitted by the headlight substantially in a lateral direction. Each stripe in at least one given group of stripes has a stripe surface which is ruled and without slope discontinuity, having tangency planes which define a set of unit prisms whose prism angles and whose slopes relative to the vertical vary together in such a manner that an incident ray on any one of the prisms is deflected laterally by the prism by an amount that varies depending on the prism, but without being subjected to vertical deflection. The invention also provides a method of making a mold die for mass producing the glass, and a method of manufacturing the glass by molding.
REFERENCES:
patent: 3877815 (1975-04-01), Hubert
patent: 3989495 (1976-11-01), Siegmund
patent: 4041303 (1977-08-01), Ricard
patent: 4272801 (1981-06-01), Fratty
patent: 4338012 (1982-07-01), Matsumura et al.
patent: 4930051 (1990-05-01), Golz
Howell Janice A.
Nguyen Kiet T.
Valeo Vision
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