Illumination apparatus
AssigneeVictor Company of Japan, Ltd.
InventorRyusaku Takahashi
Life of this patent
Estimating the term…
Abstract
An Illumination apparatus according to the present invention is provided with a light source, a mirror that reflects a light emitted by the light source and converts it to a convergent light beam, and a collimator lens that collimates the convergent light beam reflected by the mirror to a collimated light beam. Here, the collimator lens is provided with a region positioned at a central region with respect to an optical axis and having a negative focal distance, and a plurality of concentric annular regions centering with respect to the optical axis and having focal distances different from each other.
Claims3
An illumination apparatus comprising:
- a light source;
- a mirror reflecting a light emitted by the light source and converting the light to a convergent light beam;
- and
- a collimator lens converting the convergent light beam exited from the mirror to a collimated light beam,
- wherein the collimator lens is provided with a region positioned at a central region with respect to an optical axis and having a negative focal distance, and a plurality of concentric annular regions centering with respect to the optical axis and having focal distances different from each other.
Dependencies are inferred from the claim text.