Intermediate range intensity modification of gaussian beam using optical integration means

Claim 2

Optical projection apparatus comprising: a multi-element source projecting a beam having a generally Gaussian intensity distribution along an optical axis towards an output plane; a rod of optically transmitting material disposed coaxially with the optical axis, the rod having an entrance face and an exit face; an objective lens disposed between the rod exit face and the output plane, said objective lens having a given focal length; and optical means for moving the image of the rod entrance face that would otherwise be created between the lens and the output plane to a position between the rod exit face and the lens; whereby the intensity of the beam projected along the optical axis from the exit face to the output plane has a generally uniform intensity throughout the length of the projected beam.

Claim 3

The apparatus of claim 1 wherein said optical means comprises a spherical surface on the exit face.

Claim 4

The apparatus of claim 2 wherein the spherical exit face surface is adapted to image the rod entrance face at substantially the front focal length of the lens.

Claim 5

The apparatus of claim 3 wherein the entrance face of the rod is faceted.

Claim 6

The apparatus of claim 4 wherein the entrance face is defined by four triangular-shaped surfaces meeting at an apex disposed substantially coaxially with the optical axis.

Claim 7

Optical projection apparatus for projecting a light beam of substantially uniform intensity along an optical axis towards an output plane, said apparatus comprising: a multi-element, nonplanar source of light projecting a beam along the optical axis towards the output plane; a rod of optically transmitting material having its length disposed coaxially with the beam projected from the source, said rod having a substantially rectangular cross section throughout its length between an entrance face and an exit face, said entrance and exit faces having different geometric configurations adapted to effectively invert the intensity of the beam entering the entrance face thereby producing a beam at the exit face in the form of a plane source of forwardly directed light; an objective lens disposed between the rod exit face and the output plane; and optical means formed in the rod for moving an image of the entrance face that otherwise would be created between the lens and the output plane to a position between the rod exit face and the lens; whereby the beam projected between the rod to the output plane has a substantially uniform intensity throughout its entire length.

Claim 8

Optical projection apparatus for projecting a light beam of substantially uniform intensity along an optical axis towards an output plane, said apparatus comprising: a multi-element, nonplanar source of light projecting a beam along the optical axis towards the output plane; a rod of optically transmitting material having its length disposed coaxially with the beam projected from the source, said rod having a substantially rectangular cross section throughout its length between an entrance face and an exit face, said entrance and exit faces having different geometric configurations adapted to effectively invert the intensity of the beam entering the entrance face thereby producing a beam at the exit face in the form of a plane source of forwardly directed light; an objective lens disposed between the rod exit face and the output plane; and optical means formed in the rod for moving an image of the entrance face that otherwise would be created between the lens and the output plane to a position between the rod exit face and the lens; whereby the beam projected between the rod to the output plane has a substantially uniform intensity throughout its entire length.

Claim 9

The apparatus of claim 6 wherein the entrance face has faceted surfaces.

Claim 10

The apparatus of claim 6 wherein the optical means is a spherical surface integrally formed on the exit face of the rod.

Claim 11

The apparatus of claim 8 wherein the spherical surface is adapted to focus the image of the entrance face at substantially the front focal plane of the lens

Claim 12

The apparatus of claim 6 wherein said rod is constructed of a single piece of quartz material.

Claim 13

Optical projection apparatus comprising: a nonplanar laser diode array projecting a beam along an optical axis to an output plane; a quartz rod having a generally rectangular cross sectional area, a faceted entrance face and a spherical exit face; an objective lens disposed between the rod exit face and the output plane, said lens having a given focal length; and said rod exit face having a sufficient radius to image the rod entrance face at a location substantially coinciding with the front focal length of the objective lens; whereby the beam projected from the exit face of the rod to the output plane has a substantially uniform intensity distribution throughout its length.

Claim 14

Optical projection apparatus comprising: a nonplanar laser diode array projecting a beam along an optical axis to an output plane; a quartz rod having a generally rectangular cross sectional area, a faceted entrance face and a spherical exit face; an objective lens disposed between the rod exit face and the output plane, said lens having a given focal length; and said rod exit face having a sufficient radius to image the rod entrance face at a location substantially coinciding with the front focal length of the objective lens; whereby the beam projected from the exit face of the rod to the output plane has a substantially uniform intensity distribution throughout its length.