Back to results
US 5,180,218 AGranted
Automotive projection type headlamp having no ultraviolet rays output
AssigneeKoito Manufacturing Co., Ltd.
InventorHirohiko Ohshio
Life of this patent
Estimating the term…
Abstract
A projection-type automotive headlamp which includes a lamp body, an outer cover defining a lamp chamber with the lamp body, a projection unit consisting of a substantially elliptic reflector on which a discharge-type bulb is mounted and a projection lens secured on a front opening of the reflector which are unitary formed with each other, a cylindrical UV rays shielding glove surrounding the discharge-type bulb, and a UV rays shielding layer formed on the projection lens.
Claims24
An automotive projection-type headlamp comprising:
- a headlamp body;
- an outer cover mounted on said headlamp body for defining a lamp chamber;
- and
- a projector unit accommodated in said lamp chamber, said projection unit comprising:
- a substantially elliptic reflector having a front opening;
- a cylindrical holder fixed to said front opening of said reflector;
- a projection lens secured to said holder;
- a light source comprising a discharge-type bulb located at a first focal point of said reflector;
- first ultraviolet (UV) shielding means for cutting off UV rays part of light beams radiating from said discharge bulb and directing toward said reflector;
- and
- second UV shielding means for cutting off UV rays part of light beams passing through said projection lens.
8 more elements
Dependencies are inferred from the claim text.