Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled
Patent
1989-11-30
1991-11-19
Lazarus, Ira S.
Illumination
Vehicle steering mechanism or element moves pivoted lamp or...
Tie rod element controlled
362297, 362346, 362347, B60Q 100
Patent
active
050670530
ABSTRACT:
In a headlamp having a light-diverging concave mirror, the inner reflecting surface of the concave mirror is a composite paraboloidal surface of revolution made of multiple different paraboloidal surfaces of revolution taking as common focus a predetermined point on the optical axis and smoothly joined to each other, and the lamp bulb is so disposed as to have the center thereof disposed as substantially coincident with the common focus. Each of the different paraboloidal surfaces of revolution composing the inner reflecting surface reflects the rays incident from the lamp bulb in directions away from the optical axis in a horizontal plane in which the optical axis lies, in directions parallel to the optical axis or in directions nearer to the optical axis. Since the angles of the reflected rays with respect too the optical axis are different depending upon their distances from the common focus, the luminous intensity distribution pattern can have an ample amount of light and the pattern can be extended nearly uniformly from its center horizontally to the right and left, and also the light amount can be adjusted. Therefore, the rays emitted from the lamp bulb can be utilized most effectively for illumination of the road surface.
REFERENCES:
patent: 4422135 (1983-12-01), McCamy
patent: 4704661 (1987-11-01), Kasmatka
patent: 4779179 (1988-10-01), Oyama et al.
patent: 4825344 (1989-04-01), Ichihara et al.
patent: 4905133 (1990-02-01), Mayer et al.
patent: 4916585 (1990-04-01), Nino
Hagarman Sue
Ichikoh Industries Ltd.
Lazarus Ira S.
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